[GreenKeys] GreenKeys Digest, Vol 234, Issue 5
David Saul
davesaul at pacbell.net
Sun Nov 19 15:39:43 EST 2023
Sent from my iPad
> On Jul 15, 2023, at 12:41 PM, greenkeys-request at mailman.qth.net wrote:
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> Today's Topics:
>
> 1. Re: RTTYART Capture Program (Skip Macaulay)
> 2. Re: 400 Hz MITE Power Supply (steve bennett)
> 3. RTTYArt Program (Skip Macaulay)
> 4. Mite keyboard (THOMAS SMITH)
> 5. Mystery RTTY Project (B. Smith)
> 6. Re: Mystery RTTY Project (Skip Macaulay)
> 7. Re: Mystery RTTY Project (Harold Hallikainen)
> 8. Re: Mystery RTTY Project (Alf Fisher)
> 9. Re: Mystery RTTY Project (Ralph Mowery)
> 10. Re: Mystery RTTY Project (Harold Hallikainen)
> 11. Re: Mystery RTTY Project (Jones, Douglas W)
> 12. Re: Mystery RTTY Project (Harold Hallikainen)
> 13. Re: Mystery RTTY Project (Jeffrey Golas)
> 14. OT TEST 1 (John, W9DDD)
> 15. Re: Mystery RTTY RY Comparison (B. Smith)
> 16. MITE 400 Hz unit ITTY test (William Wuttke)
> 17. Re: MITE 400 Hz unit ITTY test (Paul Heller)
> 18. Re: MITE 400 Hz unit ITTY test (B. Smith)
> 19. Re: Posting problem (w9ddd at tapr.org)
> 20. Re: MITE 400 Hz unit ITTY test (Harold Hallikainen)
> 21. Fwd: Where was the typewriter invented? (Don Robert House)
> 22. Re: Fwd: Where was the typewriter invented? (Harold Hallikainen)
> 23. All Electronic Closing (Richard Knoppow)
> 24. Re: All Electronic Closing (Jeff Albrecht)
> 25. Re: All Electronic Closing (Doug Alderdice)
> 26. Re: All Electronic Closing (k6tfz)
> 27. Re: All Electronic Closing (Harold Hallikainen)
> 28. Re: All Electronic Closing (Jeff Albrecht)
> 29. Sandy's Electronics (k6tfz)
> 30. Kleinschmidt TT-4/TG Teletype (Pete G)
> 31. Model 28ASR etc (RODNEY HOGG)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 7 Jul 2023 09:46:14 -0600
> From: Skip Macaulay <ve6bgt at gmail.com>
> To: W2HX <w2hx at w2hx.com>
> Cc: Greenkeys <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] RTTYART Capture Program
> Message-ID:
> <CAAm=MFawNMZ5x2GA4fV_G92QkFveA_QPziCfVKp_Nk6OdbD=ew at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hello Eugene.. Well I know what your saying about ascii conversion etc..
> I read the documents that are with the program and he describes it as
> simply getting the TTY loop converted to RS232 for the computer is all..
> The program has many selections in the setup to select Baudot and different
> setting for it..
>> From what I can read thats all there is..
> At one point he says just connect after setting it up and type on the TTY
> and it will show up in the monitor screen of the computer.. The capture
> side shows the data being recieved and then stored, it looks like it's
> working there..
> But nothing but garbage all over the monitor screen.. So am curious what I
> am missing.. Skip
>
> On Fri, Jul 7, 2023, 7:06 AM W2HX, <w2hx at w2hx.com> wrote:
>
>> Are you converting from baudot to ascii? Otherwise it will look like
>> garbage on the PC
>>
>>
>>
>>
>>
>> 73 Eugene W2HX
>> Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos
>>
>>
>>
>> *From:* greenkeys-bounces at mailman.qth.net <
>> greenkeys-bounces at mailman.qth.net> *On Behalf Of *Skip Macaulay
>> *Sent:* Thursday, July 6, 2023 10:39 PM
>> *To:* Greenkeys <greenkeys at mailman.qth.net>
>> *Subject:* [GreenKeys] RTTYART Capture Program
>>
>>
>>
>> Hello group, I have been trying to make the RTTYART capture program to
>> work with my TTY setup. I have sampled off my demodulator output a TTL
>>
>> signal which is fed onto the UART circuit that feeds the model 28
>> normally and works.. This TTL signal I fed into a MAX232 chip to
>> convert back to a RS232
>>
>> signal and is connected to my serial port on the computer.. I installed
>> the program and set it up as best as I can figure after reading the
>> documents but
>>
>> all I get is garbage on the display.. Groups of letters sometimes and so
>> on.. I am monitoring the ITTY signal as the source and my question is this:
>>
>> Should I be seeing what the ITTY signal is being printed on my 28
>> machine?? The point where I am sampling the TTY signal is the normal 60
>> WPM signal
>>
>> before it goes to the UART and is converted up to 100 WPM for my 28 that
>> is geared for 100 WPM...
>>
>> Any suggestions will be appreciated.. Skip
>>
>>
>>
>> --
>>
>> Skip Macaulay
>>
>> VE6BGT
> Skip MacAulay
> VE6BGT
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> ------------------------------
>
> Message: 2
> Date: Fri, 7 Jul 2023 16:30:27 +0000 (UTC)
> From: steve bennett <raleigh_ranger at yahoo.com>
> To: William Wuttke <wcwuttke at gmail.com>
> Cc: GREENKEYS BULLETIN BOARD <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] 400 Hz MITE Power Supply
> Message-ID: <1504912020.984377.1688747427893 at mail.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
>
> Got plans for that 400hz supply? I got some aircraft instruments to play with and they need 400hz.-Steve
>
>
> com
>
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> ------------------------------
>
> Message: 3
> Date: Fri, 7 Jul 2023 18:37:09 -0600
> From: Skip Macaulay <ve6bgt at gmail.com>
> To: Greenkeys <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] RTTYArt Program
> Message-ID:
> <CAAm=MFaD1X24f9v=2ZstqsZh1e=uV_Gdrc+ncfkO-KsxR9fJ+w at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> I have had some success with this program.. I realized later that the TTL
> signal I was sampling was inverted so once I got that straightened out the
> program was copying the
> TTY signal, mostly.. The only issue I have is that the cursor isnt always a
> straight line but more a thick black block like you see in a text program
> with the INSERT key on your
> keyboard selected.. This black block overwrites the TTY character at the
> time and does make a mess of things.. Sometimes its ok and its all good. I
> suspect its a computer issue and I was able to capture and save a simple
> pix I had from a perf tape.. I was able to load it in the editor section of
> the program and it looked good.. I sent it out on the autostart feed and it
> went through just fine..
> So it seems to work mostly.. Just a report.. Skip
>
> --
> Skip Macaulay
> VE6BGT
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> ------------------------------
>
> Message: 4
> Date: Sat, 8 Jul 2023 00:13:52 -0500
> From: THOMAS SMITH <n5ama at att.net>
> To: GreenKeys at mailman.qth.net
> Subject: [GreenKeys] Mite keyboard
> Message-ID: <189A345D-73C1-4E3B-B49C-2A921A1D7BD3 at att.net>
> Content-Type: text/plain; charset=us-ascii
>
>
> I have a nice Mite unit but it is without a keyboard. Is there keyboards available? If so, could you please provide source information.
>
> Thanks in advance for any help.
> Tom N5AMA
>
>
> Sent from my iPad
>
>
> ------------------------------
>
> Message: 5
> Date: Sat, 8 Jul 2023 18:20:25 -0400
> From: "B. Smith" <smithab11 at comcast.net>
> To: greenkeys at mailman.qth.net
> Subject: [GreenKeys] Mystery RTTY Project
> Message-ID: <efe89364-41fc-cc3d-f0b7-b20599939e5f at comcast.net>
> Content-Type: text/plain; charset="utf-8"; Format="flowed"
>
> Several have figured out the project. The RY's are generated by sending
> a square wave using a 555. The 555 then drives an HSR series optical
> switch which keys the local loop. Dovetron does a similar operation with
> their RY generator. There are plenty of Chink 555 boards on ePay that
> are all ready built and cost is around 2 bucks.
> Photo Attached.
> K4CHE
> http://k4che.com/Tempvideo/RTTY%20Mystery%20Project/Mystery%20K4CHE.mp4
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> ------------------------------
>
> Message: 6
> Date: Sat, 8 Jul 2023 16:41:28 -0600
> From: Skip Macaulay <ve6bgt at gmail.com>
> To: "B. Smith" <smithab11 at comcast.net>
> Cc: Greenkeys <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] Mystery RTTY Project
> Message-ID:
> <CAAm=MFb_jPLt2Uf06A=6V4w_OHfU99UxiN2F572b+F0d1wC08A at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Wild project, real bread " board" stuff !!
> Skip
>
> Skip MacAulay
> VE6BGT
>
> On Sat, Jul 8, 2023, 4:20 PM B. Smith, <smithab11 at comcast.net> wrote:
>
>> Several have figured out the project. The RY's are generated by sending
>> a square wave using a 555. The 555 then drives an HSR series optical
>> switch which keys the local loop. Dovetron does a similar operation with
>> their RY generator. There are plenty of Chink 555 boards on ePay that
>> are all ready built and cost is around 2 bucks.
>> Photo Attached.
>> K4CHE
>> http://k4che.com/Tempvideo/RTTY%20Mystery%20Project/Mystery%20K4CHE.mp4
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>> https://teletype.net/gksearch
>>>>> 2002-to-present greenkeys archive:
>> http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive:
>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>> http://comcents.com/tty/greenkeyssearch.html
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to ve6bgt at gmail.com
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> ------------------------------
>
> Message: 7
> Date: Sat, 8 Jul 2023 15:49:40 -0700
> From: "Harold Hallikainen" <harold at w6iwi.org>
> To: "Skip Macaulay" <ve6bgt at gmail.com>
> Cc: Greenkeys <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] Mystery RTTY Project
> Message-ID:
> <318d4138ba17b2a3435763a13dd5a14b.squirrel at hallikainen.org>
> Content-Type: text/plain;charset=iso-8859-1
>
> That IS pretty clever! I assume the printer has auto CRLF since the
> generator would only generate RY. Also, all bits would be the same length,
> including the stop bit which, for 60 wpm is usually 31 ms long compared to
> 22 ms for the other bits. But, if we are sampling in the middle of the
> bit, it seems like any stop bit longer than 11 ms would work. Thinking
> about the square wave, I get
>
> 0 - start
> 1 - D0
> 0 - D1
> 1 - D2
> 0 - D3
> 1 - D4
> 0 - stop
>
> So, it seems like we'd get framing errors on a square wave since the stop
> bit is a 0.
>
> Harold
> https://w6iwi.org
>
> On Sat, July 8, 2023 3:41 pm, Skip Macaulay wrote:
>> Wild project, real bread " board" stuff !!
>> Skip
>>
>> Skip MacAulay
>> VE6BGT
>>
>> On Sat, Jul 8, 2023, 4:20 PM B. Smith, <smithab11 at comcast.net> wrote:
>>
>>> Several have figured out the project. The RY's are generated by sending
>>> a square wave using a 555. The 555 then drives an HSR series optical
>>> switch which keys the local loop. Dovetron does a similar operation with
>>> their RY generator. There are plenty of Chink 555 boards on ePay that
>>> are all ready built and cost is around 2 bucks.
>>> Photo Attached.
>>> K4CHE
>>> http://k4che.com/Tempvideo/RTTY%20Mystery%20Project/Mystery%20K4CHE.mp4
>>> ______________________________________________________________
>>> GreenKeys mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:GreenKeys at mailman.qth.net
>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>> https://teletype.net/gksearch
>>>>>> 2002-to-present greenkeys archive:
>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>>> 1998-to-2001 greenkeys archive:
>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>> http://comcents.com/tty/greenkeyssearch.html
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to ve6bgt at gmail.com
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>> https://teletype.net/gksearch
>>>>> 2002-to-present greenkeys archive:
>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive:
>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>> http://comcents.com/tty/greenkeyssearch.html
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to harold at w6iwi.org
>
>
> --
> Not sent from an iPhone.
>
>
> ------------------------------
>
> Message: 8
> Date: Sun, 9 Jul 2023 00:19:09 +0100
> From: Alf Fisher <alffisher2 at gmail.com>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Mystery RTTY Project
> Message-ID: <46d70718-6c12-8055-80ea-abedeacf64f3 at gmail.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Harold,
> I cant see how a square wave would work.
> If you listen to an off-air RY signal it has rhythmical brrr, brrr, brrr
> but a square wave wouldn't have the rhythmical breaks that make the stop
> bits.
>
> There was an article for an RY generator by W7ZTC in the March 71 issue
> of Ham Radio.
> It used some really old RTL chips MC-890-P and MC-824-P.
> Maybe someone could redesign the circuit using standard LS TTL or CD4000
> series chips.
>
> Alf G3WSD
>
>
>
> On 08/07/2023 23:49, Harold Hallikainen via GreenKeys wrote:
>> That IS pretty clever! I assume the printer has auto CRLF since the
>> generator would only generate RY. Also, all bits would be the same length,
>> including the stop bit which, for 60 wpm is usually 31 ms long compared to
>> 22 ms for the other bits. But, if we are sampling in the middle of the
>> bit, it seems like any stop bit longer than 11 ms would work. Thinking
>> about the square wave, I get
>>
>> 0 - start
>> 1 - D0
>> 0 - D1
>> 1 - D2
>> 0 - D3
>> 1 - D4
>> 0 - stop
>>
>> So, it seems like we'd get framing errors on a square wave since the stop
>> bit is a 0.
>>
>> Harold
>> https://w6iwi.org
>>
>> On Sat, July 8, 2023 3:41 pm, Skip Macaulay wrote:
>>> Wild project, real bread " board" stuff !!
>>> Skip
>>> Skip MacAulay
>>> VE6BGT
>>> On Sat, Jul 8, 2023, 4:20 PM B. Smith, <smithab11 at comcast.net> wrote:
>>>> Several have figured out the project. The RY's are generated by sending
>>>> a square wave using a 555. The 555 then drives an HSR series optical
>>>> switch which keys the local loop. Dovetron does a similar operation with
>>>> their RY generator. There are plenty of Chink 555 boards on ePay that
>>>> are all ready built and cost is around 2 bucks.
>>>> Photo Attached.
>>>> K4CHE
>>>> http://k4che.com/Tempvideo/RTTY%20Mystery%20Project/Mystery%20K4CHE.mp4
>>>> ______________________________________________________________
>>>> GreenKeys mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:GreenKeys at mailman.qth.net
>>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>> https://teletype.net/gksearch
>>>>>>> 2002-to-present greenkeys archive:
>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>>>> 1998-to-2001 greenkeys archive:
>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>> http://comcents.com/tty/greenkeyssearch.html
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> Message delivered to ve6bgt at gmail.com
>>> ______________________________________________________________
>>> GreenKeys mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:GreenKeys at mailman.qth.net
>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>>> https://teletype.net/gksearch
>>>>>> 2002-to-present greenkeys archive:
>>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>>> 1998-to-2001 greenkeys archive:
>>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>>> http://comcents.com/tty/greenkeyssearch.html
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to harold at w6iwi.org
>
>
>
> ------------------------------
>
> Message: 9
> Date: Sat, 8 Jul 2023 20:55:52 -0400
> From: "Ralph Mowery" <rmowery42 at charter.net>
> To: <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] Mystery RTTY Project
> Message-ID: <003501d9b200$1c206710$54613530$@net>
> Content-Type: text/plain; charset="utf-8"
>
> Seems that the Arduino could be coded to do that and have the 31 ms stop bit. Most any speed could be set and the cr/lf added after a set number of characters.
>
> Ralph ku4pt
>
>
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of B. Smith
> Sent: Saturday, July 08, 2023 6:20 PM
> To: greenkeys at mailman.qth.net
> Subject: [GreenKeys] Mystery RTTY Project
>
> Several have figured out the project. The RY's are generated by sending a square wave using a 555. The 555 then drives an HSR series optical switch which keys the local loop. Dovetron does a similar operation with their RY generator. There are plenty of Chink 555 boards on ePay that are all ready built and cost is around 2 bucks.
> Photo Attached.
> K4CHE
> http://k4che.com/Tempvideo/RTTY%20Mystery%20Project/Mystery%20K4CHE.mp4
>
>
>
> ------------------------------
>
> Message: 10
> Date: Sat, 8 Jul 2023 18:38:37 -0700
> From: "Harold Hallikainen" <harold at w6iwi.org>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Mystery RTTY Project
> Message-ID:
> <ce605e2ef87b9ef3e6cf895106918341.squirrel at hallikainen.org>
> Content-Type: text/plain;charset=iso-8859-1
>
> Could also do it with a PIC10F200
> (https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/40001239F.pdf
> ) for 60 or 70 cents. Add a power supply and an SSR to key the loop.
>
> Harold
> https://w6iwi.org
>
> On Sat, July 8, 2023 4:19 pm, Alf Fisher wrote:
>> Harold,
>> I cant see how a square wave would work.
>> If you listen to an off-air RY signal it has rhythmical brrr, brrr, brrr
>> but a square wave wouldn't have the rhythmical breaks that make the stop
>> bits.
>>
>> There was an article for an RY generator by W7ZTC in the March 71 issue
>> of Ham Radio.
>> It used some really old RTL chips MC-890-P and MC-824-P.
>> Maybe someone could redesign the circuit using standard LS TTL or CD4000
>> series chips.
>>
>> Alf G3WSD
>>
>>
>>
>> On 08/07/2023 23:49, Harold Hallikainen via GreenKeys wrote:
>>> That IS pretty clever! I assume the printer has auto CRLF since the
>>> generator would only generate RY. Also, all bits would be the same
>>> length,
>>> including the stop bit which, for 60 wpm is usually 31 ms long compared
>>> to
>>> 22 ms for the other bits. But, if we are sampling in the middle of the
>>> bit, it seems like any stop bit longer than 11 ms would work. Thinking
>>> about the square wave, I get
>>> 0 - start
>>> 1 - D0
>>> 0 - D1
>>> 1 - D2
>>> 0 - D3
>>> 1 - D4
>>> 0 - stop
>>> So, it seems like we'd get framing errors on a square wave since the
>>> stop
>>> bit is a 0.
>>> Harold
>>> https://w6iwi.org
>>> On Sat, July 8, 2023 3:41 pm, Skip Macaulay wrote:
>>>> Wild project, real bread " board" stuff !!
>>>> Skip
>>>> Skip MacAulay
>>>> VE6BGT
>>>> On Sat, Jul 8, 2023, 4:20 PM B. Smith, <smithab11 at comcast.net> wrote:
>>>>> Several have figured out the project. The RY's are generated by
>>>>> sending
>>>>> a square wave using a 555. The 555 then drives an HSR series optical
>>>>> switch which keys the local loop. Dovetron does a similar operation
>>>>> with
>>>>> their RY generator. There are plenty of Chink 555 boards on ePay that
>>>>> are all ready built and cost is around 2 bucks.
>>>>> Photo Attached.
>>>>> K4CHE
>>>>> http://k4che.com/Tempvideo/RTTY%20Mystery%20Project/Mystery%20K4CHE.mp4
>>>>> ______________________________________________________________
>>>>> GreenKeys mailing list
>>>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>> Post: mailto:GreenKeys at mailman.qth.net
>>>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>> https://teletype.net/gksearch
>>>>>>>> 2002-to-present greenkeys archive:
>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>>>>> 1998-to-2001 greenkeys archive:
>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>> http://comcents.com/tty/greenkeyssearch.html
>>>>> This list hosted by: http://www.qsl.net
>>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>>> Message delivered to ve6bgt at gmail.com
>>>> ______________________________________________________________
>>>> GreenKeys mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:GreenKeys at mailman.qth.net
>>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>>>> https://teletype.net/gksearch
>>>>>>> 2002-to-present greenkeys archive:
>>>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>>>> 1998-to-2001 greenkeys archive:
>>>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>>>> http://comcents.com/tty/greenkeyssearch.html
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> Message delivered to harold at w6iwi.org
>>
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>> https://teletype.net/gksearch
>>>>> 2002-to-present greenkeys archive:
>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive:
>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>> http://comcents.com/tty/greenkeyssearch.html
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to harold at w6iwi.org
>
>
> --
> Not sent from an iPhone.
>
>
> ------------------------------
>
> Message: 11
> Date: Sun, 9 Jul 2023 02:06:32 +0000
> From: "Jones, Douglas W" <douglas-w-jones at uiowa.edu>
> To: "harold at w6iwi.org" <harold at w6iwi.org>, Skip Macaulay
> <ve6bgt at gmail.com>
> Cc: Greenkeys <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] Mystery RTTY Project
> Message-ID:
> <DM6PR04MB5003FAD41EDE4932A7904382A833A at DM6PR04MB5003.namprd04.prod.outlook.com>
>
> Content-Type: text/plain; charset="us-ascii"
>
> From: Harold Hallikainen via GreenKeys [greenkeys at mailman.qth.net] -- Saturday, July 8, 2023 5:49 PM
>
>> So, it seems like we'd get framing errors on a square wave
>
> Mechanical asynch receivers like TTYs don't detect framing errors, nor do they much care about them.
>
> Here's what I would have expected.
> 1 --- idle line
> 0 - start
> 1 - D0
> 0 - D1
> 1 - D2
> 0 - D3
> 1 - D4
> 0 - stop (framing error, but note*
> 1 --- idle line, note **
> 0 - start
> 1 - D0
> 0 - D1
> 1 - D2
> 0 - D3
> 1 - D4
> 0 - stop
> 1 --- idle line, note **
> 0 - start
>
> Note*: yes, a framing error, but the TTY doesn't care, it's simply insensitive to the state of the line for about 31 ms
> Note**: for 9 ms, the line is ignored as part of the stop bit, the remaining 13 ms of this 1 bit are seen as an idle line.
>
> The net result? I wouldn't have expected RYRYRY, I'd have expected RRRRRR from just a square wave.
>
> Unless what is happening is the following:
> 1 --- idle line
> 0 - start
> 1 - D0
> 0 - D1
> 1 - D2
> 0 - D3
> 1 - D4
> 0 - stop also sensed as a start bit for the next character ***
> 1 - note ****
> 0 - D0
> 1 - D1
> 0 - D2
> 1 - D3
> 0 - D4
> 1 - stop (not a framing error)
> 0 - start
>
> Note***: framing error, clutch remains engaged, shaft continues to spin.
> Note****: 0-1 transition was 9 ms before expected end of stop bit, too little time for it to matter.
>
> This would give RYRYRY, but it would probably be rather sensitive to the rangefinder setting. I'd expect the RYRYRY to sound a bit syncopated, that is, more like RY RY RY RY (not printing spaces, but a little off in the timing).
>
> Doug Jones
> jones at cs.uiowa.edu
>
> ------------------------------
>
> Message: 12
> Date: Sat, 8 Jul 2023 19:47:07 -0700
> From: "Harold Hallikainen" <harold at w6iwi.org>
> To: "Jones, Douglas W" <douglas-w-jones at uiowa.edu>
> Cc: Greenkeys <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] Mystery RTTY Project
> Message-ID:
> <55f0945336381217fc2d470fc7d901c0.squirrel at hallikainen.org>
> Content-Type: text/plain;charset=iso-8859-1
>
> Good analysis! I agree that the "framing error" results in the shaft
> continuing to rotate and go onto the next character. With a valid
> character, I'd EXPECT (but do not know) that the shaft would stop rotating
> 11 ms into the stop bit (center of a 22 ms bit time, even though the stop
> is usually 31 ms long). If there is an invalid stop bit (space), it would
> "roll into" the next character with the start bit starting 11 ms after the
> end of D4. It would then sample D0 33 ms later (22 ms for start bit and 11
> ms to center in D0).
>
> The software UART (
> https://github.com/HaroldHallikainen/DSP_TU/blob/master/src/BaudotUart.c )
> in my DSP TU (https://w6iwi.org/rtty/DspTU/ ). Detects the mark to space
> transition for the beginning of the start bit and checks it again 11 ms
> later to make sure it was a good start. If so, it then samples the input
> every 22 ms to pick up the data bits. After the last data bit, it samples
> another 22 ms later for the middle of the stop bit. If the stop bit is not
> mark, it increments an error counter. I'm planning on reporting a ROUGH
> error rate by comparing bad stop bits to good start bits.
>
> By the way, I've started assembly of the DSP TU PCB (
> https://w6iwi.org/rtty/DspTU2/ ). After soldering a few 0603 resistors
> with a soldering iron, I ordered a hot air solder station and solder
> paste. That should be here Monday.
>
> Harold
> https://w6iwi.org
>
>
>
>
> On Sat, July 8, 2023 7:06 pm, Jones, Douglas W wrote:
>> From: Harold Hallikainen via GreenKeys [greenkeys at mailman.qth.net] --
>> Saturday, July 8, 2023 5:49 PM
>>
>>> So, it seems like we'd get framing errors on a square wave
>>
>> Mechanical asynch receivers like TTYs don't detect framing errors, nor do
>> they much care about them.
>>
>> Here's what I would have expected.
>> 1 --- idle line
>> 0 - start
>> 1 - D0
>> 0 - D1
>> 1 - D2
>> 0 - D3
>> 1 - D4
>> 0 - stop (framing error, but note*
>> 1 --- idle line, note **
>> 0 - start
>> 1 - D0
>> 0 - D1
>> 1 - D2
>> 0 - D3
>> 1 - D4
>> 0 - stop
>> 1 --- idle line, note **
>> 0 - start
>>
>> Note*: yes, a framing error, but the TTY doesn't care, it's simply
>> insensitive to the state of the line for about 31 ms
>> Note**: for 9 ms, the line is ignored as part of the stop bit, the
>> remaining 13 ms of this 1 bit are seen as an idle line.
>>
>> The net result? I wouldn't have expected RYRYRY, I'd have expected RRRRRR
>> from just a square wave.
>>
>> Unless what is happening is the following:
>> 1 --- idle line
>> 0 - start
>> 1 - D0
>> 0 - D1
>> 1 - D2
>> 0 - D3
>> 1 - D4
>> 0 - stop also sensed as a start bit for the next character ***
>> 1 - note ****
>> 0 - D0
>> 1 - D1
>> 0 - D2
>> 1 - D3
>> 0 - D4
>> 1 - stop (not a framing error)
>> 0 - start
>>
>> Note***: framing error, clutch remains engaged, shaft continues to spin.
>> Note****: 0-1 transition was 9 ms before expected end of stop bit, too
>> little time for it to matter.
>>
>> This would give RYRYRY, but it would probably be rather sensitive to the
>> rangefinder setting. I'd expect the RYRYRY to sound a bit syncopated,
>> that is, more like RY RY RY RY (not printing spaces, but a little off in
>> the timing).
>>
>> Doug Jones
>> jones at cs.uiowa.edu
>
>
> --
> https://w6iwi.org
>
>
> ------------------------------
>
> Message: 13
> Date: Sun, 9 Jul 2023 01:35:01 -0400
> From: Jeffrey Golas <jeffg at junknet.net>
> To: Ralph Mowery <rmowery42 at charter.net>
> Cc: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Mystery RTTY Project
> Message-ID: <0F2DA166-AC96-4ED8-B25A-D2074DDBF236 at junknet.net>
> Content-Type: text/plain; charset=utf-8
>
> It can, theres a project on hackaday that does work.
>
> Jeff
>
>> On Jul 8, 2023, at 8:56 PM, Ralph Mowery <rmowery42 at charter.net> wrote:
>>
>> ?Seems that the Arduino could be coded to do that and have the 31 ms stop bit. Most any speed could be set and the cr/lf added after a set number of characters.
>>
>> Ralph ku4pt
>>
>>
>> -----Original Message-----
>> From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of B. Smith
>> Sent: Saturday, July 08, 2023 6:20 PM
>> To: greenkeys at mailman.qth.net
>> Subject: [GreenKeys] Mystery RTTY Project
>>
>> Several have figured out the project. The RY's are generated by sending a square wave using a 555. The 555 then drives an HSR series optical switch which keys the local loop. Dovetron does a similar operation with their RY generator. There are plenty of Chink 555 boards on ePay that are all ready built and cost is around 2 bucks.
>> Photo Attached.
>> K4CHE
>> http://k4che.com/Tempvideo/RTTY%20Mystery%20Project/Mystery%20K4CHE.mp4
>>
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to jeffg at junknet.net
>
>
> ------------------------------
>
> Message: 14
> Date: Sun, 9 Jul 2023 16:09:00 -0500
> From: "John, W9DDD" <w9ddd at tapr.org>
> To: Green Keys <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] OT TEST 1
> Message-ID: <ac6680c4-890e-0154-592f-6d1e779a053f at tapr.org>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> Sorry, but something isn't right.
>
> --
> ---
> ----
> You said "tomorrow" yesterday.
>
> The above comments or recommendations are SWAG. Use at your own risk.
> John, W9DDD
>
>
>
> ------------------------------
>
> Message: 15
> Date: Sun, 9 Jul 2023 20:18:09 -0400
> From: "B. Smith" <smithab11 at comcast.net>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Mystery RTTY RY Comparison
> Message-ID: <706cd55f-d364-786b-619d-0f2e02cbdac0 at comcast.net>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> I was curious about Doug's remark that the RY sequence created by the
> 555 Square Wave generator might sound "syncopated".? His comment below.
> So? I made a short comparison video of? the 555 generator RYs and
> another RY source.
> k4che
> http://k4che.com/Tempvideo/RY%20Comparison/555RYComp.mp4
>
> "This would give RYRYRY, but it would probably be rather sensitive to the rangefinder setting. I'd expect the RYRYRY to sound a bit syncopated, that is, more like RY RY RY RY (not printing spaces, but a little off in the timing)."
>
> T
>
> On 7/8/2023 10:06 PM, Jones, Douglas W wrote:
>> From: Harold Hallikainen via GreenKeys [greenkeys at mailman.qth.net] -- Saturday, July 8, 2023 5:49 PM
>>
>>> So, it seems like we'd get framing errors on a square wave
>> Mechanical asynch receivers like TTYs don't detect framing errors, nor do they much care about them.
>>
>> Here's what I would have expected.
>> 1 --- idle line
>> 0 - start
>> 1 - D0
>> 0 - D1
>> 1 - D2
>> 0 - D3
>> 1 - D4
>> 0 - stop (framing error, but note*
>> 1 --- idle line, note **
>> 0 - start
>> 1 - D0
>> 0 - D1
>> 1 - D2
>> 0 - D3
>> 1 - D4
>> 0 - stop
>> 1 --- idle line, note **
>> 0 - start
>>
>> Note*: yes, a framing error, but the TTY doesn't care, it's simply insensitive to the state of the line for about 31 ms
>> Note**: for 9 ms, the line is ignored as part of the stop bit, the remaining 13 ms of this 1 bit are seen as an idle line.
>>
>> The net result? I wouldn't have expected RYRYRY, I'd have expected RRRRRR from just a square wave.
>>
>> Unless what is happening is the following:
>> 1 --- idle line
>> 0 - start
>> 1 - D0
>> 0 - D1
>> 1 - D2
>> 0 - D3
>> 1 - D4
>> 0 - stop also sensed as a start bit for the next character ***
>> 1 - note ****
>> 0 - D0
>> 1 - D1
>> 0 - D2
>> 1 - D3
>> 0 - D4
>> 1 - stop (not a framing error)
>> 0 - start
>>
>> Note***: framing error, clutch remains engaged, shaft continues to spin.
>> Note****: 0-1 transition was 9 ms before expected end of stop bit, too little time for it to matter.
>>
>> This would give RYRYRY, but it would probably be rather sensitive to the rangefinder setting. I'd expect the RYRYRY to sound a bit syncopated, that is, more like RY RY RY RY (not printing spaces, but a little off in the timing).
>>
>> Doug Jones
>> jones at cs.uiowa.edu
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to smithab11 at comcast.net
>
>
>
> ------------------------------
>
> Message: 16
> Date: Tue, 11 Jul 2023 16:37:44 -0700
> From: William Wuttke <wcwuttke at gmail.com>
> To: John Lawson <John at tubetestingpros.com>, Andrew Oxner
> <andrew at spectralprecision.com>, Mike <mmcauley at cox.net>, Harold
> Hallikainen <harold at w6iwi.org>, "GreenKeys at mailman.qth.net"
> <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] MITE 400 Hz unit ITTY test
> Message-ID:
> <CADo5+=Ljio4KQ-zYcLxDj6XzXfhgzHyC5nW=xycNQH9av8+Jsg at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> I want to run my 400 Hz MITE at 45 baud but only have a 50 baud speed gear.
> A side benefit of my 400 Hz power supply is that the frequency is
> adjustable. So, I adjusted the frequency to 360 Hz and voila! Now I can
> print at 45 baud!
>
> Here's the video:
> https://youtu.be/nEK7Kimp2U0
>
> Bill
> KE3BK
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20230711/b09968ec/attachment-0001.html>
>
> ------------------------------
>
> Message: 17
> Date: Tue, 11 Jul 2023 18:51:18 -0500
> From: Paul Heller <paul0926 at comcast.net>
> To: William Wuttke <wcwuttke at gmail.com>
> Cc: Andrew Oxner <andrew at spectralprecision.com>,
> GreenKeys at mailman.qth.net
> Subject: Re: [GreenKeys] MITE 400 Hz unit ITTY test
> Message-ID: <C199A2C7-988E-44AE-AF37-9D53F96F62D5 at comcast.net>
> Content-Type: text/plain; charset="us-ascii"
>
> An HTML attachment was scrubbed...
> URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20230711/180bb109/attachment-0001.html>
>
> ------------------------------
>
> Message: 18
> Date: Tue, 11 Jul 2023 20:57:44 -0400
> From: "B. Smith" <smithab11 at comcast.net>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] MITE 400 Hz unit ITTY test
> Message-ID: <4621b24c-67bf-5561-fa4a-03c09d6284b6 at comcast.net>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Beautiful,
> "Improvise - Adapt- Overcome"
> I sort of miss the ole governed motors.
> k4che
>
> On 7/11/2023 7:51 PM, Paul Heller wrote:
>> Nice! There is also a 50 baud itty feed at the standard European
>> frequencies that you could try.
>>
>> Paul
>> W2TTY
>>
>> ITTY: HTTP://INTERNET-TTY.NET:8000/ITTY
>> <http://internet-tty.net:8000/ITTY>
>> ITTY100: HTTP://INTERNET-TTY.NET:8010/ITTY100
>> <http://internet-tty.net:8040/EUROPE>
>> AUTOSTART: HTTP://INTERNET-TTY.NET:8030/AUTOSTART
>> <http://internet-tty.net:8030/AUTOSTART>
>> EUROPE: HTTP://INTERNET-TTY.NET:8040/EUROPE
>> <http://internet-tty.net:8040/EUROPE>
>>
>>> On Jul 11, 2023, at 6:38 PM, William Wuttke <wcwuttke at gmail.com> wrote:
>>> ?
>>> I want to run my 400 Hz MITE at 45 baud but only have a 50 baud speed
>>> gear. A side benefit of my 400 Hz power supply is that the frequency
>>> is adjustable. So, I adjusted the frequency to 360 Hz and voila! Now
>>> I can print at 45 baud!
>>> Here's the video:
>>> https://youtu.be/nEK7Kimp2U0
>>> Bill
>>> KE3BK
>>> ______________________________________________________________
>>> GreenKeys mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:GreenKeys at mailman.qth.net
>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>>> https://teletype.net/gksearch
>>>>>> 2002-to-present greenkeys archive:
>>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>>> 1998-to-2001 greenkeys archive:
>>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>>> http://comcents.com/tty/greenkeyssearch.html
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to phearvada at gmail.com
>>
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to smithab11 at comcast.net
>
>
>
> ------------------------------
>
> Message: 19
> Date: Tue, 11 Jul 2023 21:26:25 -0500
> From: "w9ddd at tapr.org" <w9ddd at tapr.org>
> To: Gil Smith <gil at baudot.net>
> Cc: GreenKeys at mailman.qth.net
> Subject: Re: [GreenKeys] Posting problem
> Message-ID: <79D72867-0BCB-43AF-9B4A-6B1943549070 at tapr.org>
> Content-Type: text/plain; charset="us-ascii"
>
> I think I found the problem.
>
> BTW I forgot to thank you for checking the account setting for me.
>
> ---
> ----
> You said "tomorrow" yesterday.
> The above comments or recommendations are SWAG. Use at your own risk.
> John, W9DDD
>
>> On Jul 11, 2023, at 8:36 PM, Gil Smith <gil at baudot.net> wrote:
>>
>> Hi John:
>>
>> Hmm, not sure what's happening there. Your account looks fine in the admin panel, and your test message (I presume from your desktop) went to the list properly.
>>
>> Ensure that your ipad is sending from the same email address. There could also be some spam blacklisting happening somewhere.
>>
>> gil
>>
>>
>>
>> ----- Original message -----
>> From: "John, W9DDD" <w9ddd at tapr.org>
>> To: Gil Smith <gil at baudot.net>
>> Subject: Posting problem
>> Date: Sunday, July 09, 2023 7:17 PM
>>
>> Hi Gil,
>>
>> I had to reset my iPad to factory to recover lost memory space. I got
>> all the settings back to where they were before the reset and can send
>> email to others, but my postings to GK seem to get lost. I can post
>> from my desktop (at least a short test message). Email smtp server uses
>> a different port for apple stuff (587) than it does for the desktop (993)
>>
>> Any ideas?
>>
>> --
>> ---
>> ----
>> You said "tomorrow" yesterday.
>>
>> The above comments or recommendations are SWAG. Use at your own risk.
>> John, W9DDD
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20230711/220263d0/attachment-0001.html>
>
> ------------------------------
>
> Message: 20
> Date: Tue, 11 Jul 2023 20:34:20 -0700
> From: "Harold Hallikainen" <harold at w6iwi.org>
> To: "William Wuttke" <wcwuttke at gmail.com>
> Cc: Andrew Oxner <andrew at spectralprecision.com>,
> "GreenKeys at mailman.qth.net" <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] MITE 400 Hz unit ITTY test
> Message-ID:
> <d62f32b2f4bb12e44ec379a4237730a2.squirrel at hallikainen.org>
> Content-Type: text/plain;charset=iso-8859-1
>
> That's great! My brother has a machine shop with a lot of variable
> frequency drives that are single phase in and three phase out. I've always
> wondered if they would drive a single phase load (a Teletype). They are
> amazingly cheap.
>
> Harold
> https://w6iwi.org
>
>
> On Tue, July 11, 2023 4:37 pm, William Wuttke wrote:
>> I want to run my 400 Hz MITE at 45 baud but only have a 50 baud speed
>> gear.
>> A side benefit of my 400 Hz power supply is that the frequency is
>> adjustable. So, I adjusted the frequency to 360 Hz and voila! Now I can
>> print at 45 baud!
>>
>> Here's the video:
>> https://youtu.be/nEK7Kimp2U0
>>
>> Bill
>> KE3BK
>
>
> --
> https://w6iwi.org
>
>
> ------------------------------
>
> Message: 21
> Date: Wed, 12 Jul 2023 12:22:29 -0500
> From: Don Robert House <drhouse42 at icloud.com>
> To: Greenkeys <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] Fwd: Where was the typewriter invented?
> Message-ID: <9BC67C54-AE8B-45DC-90C4-4250F68CCF27 at icloud.com>
> Content-Type: text/plain; charset="us-ascii"
>
> An HTML attachment was scrubbed...
> URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20230712/b438f9c6/attachment-0001.html>
>
> ------------------------------
>
> Message: 22
> Date: Wed, 12 Jul 2023 19:49:23 -0700
> From: "Harold Hallikainen" <harold at w6iwi.org>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Fwd: Where was the typewriter invented?
> Message-ID:
> <30f83cfcef8970a07b03272726f59884.squirrel at hallikainen.org>
> Content-Type: text/plain;charset=iso-8859-1
>
> Nice! A great movie about the typewriter is California Typewriter
> https://californiatypewritermovie.com/ .
>
> Harold
> https://w6iwi.org
>
>
>
>
> ------------------------------
>
> Message: 23
> Date: Wed, 12 Jul 2023 20:41:54 -0700
> From: Richard Knoppow <dickburk at ix.netcom.com>
> To: Greenkeys <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] All Electronic Closing
> Message-ID: <1b9d9ddc-6f03-265e-aaa1-7a425e39e2bd at ix.netcom.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> All Electronic, one of the last of the old time surplus stores, is
> closing at the end of August. Still in business and still have their
> walk in store in van Nuys CA but will be gone soon. I will try to get
> over there in a couple of days.
> --
> Richard Knoppow
> WB6KBL
> SKCC 19998
>
>
> ------------------------------
>
> Message: 24
> Date: Wed, 12 Jul 2023 20:50:00 -0700
> From: Jeff Albrecht <jeffa at rodaw.com>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] All Electronic Closing
> Message-ID: <2717de0c-cfa4-7f2a-139d-8619b1572c7b at rodaw.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> On 7/12/2023 8:41 PM, Richard Knoppow wrote:
>> All Electronic, one of the last of the old time surplus stores, is
>> closing at the end of August. Still in business and still have their
>> walk in store in van Nuys CA but will be gone soon. I will try to get
>> over there in a couple of days.
>
> Sadness. I've purchased some cool stuff during several walkins.... It
> was great to walk around for inspiration too.
>
> ?- Jeff
>
> --
> Jeff Albrecht KF7CRU @jhalbrecht
>
>
> ------------------------------
>
> Message: 25
> Date: Wed, 12 Jul 2023 23:58:33 -0400
> From: Doug Alderdice <dalderdi at verizon.net>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] All Electronic Closing
> Message-ID: <ec68ba62-6051-c622-f4ae-fc555dae2ac0 at verizon.net>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Indeed, sadness. I've never been in the store being on the other coast
> but I have sure ordered from their catalog many, many times over the years.
>
> Doug, KA2WFT
>
> On 7/12/2023 11:50 PM, Jeff Albrecht wrote:
>> On 7/12/2023 8:41 PM, Richard Knoppow wrote:
>>> All Electronic, one of the last of the old time surplus stores, is
>>> closing at the end of August. Still in business and still have their
>>> walk in store in van Nuys CA but will be gone soon. I will try to get
>>> over there in a couple of days.
>>
>> Sadness. I've purchased some cool stuff during several walkins.... It
>> was great to walk around for inspiration too.
>>
>> ?- Jeff
>
> ------------------------------
>
> Message: 26
> Date: Thu, 13 Jul 2023 17:04:50 +0000 (UTC)
> From: k6tfz <k6tfz at aol.com>
> To: "GreenKeys at mailman.qth.net" <GreenKeys at mailman.qth.net>
> Subject: Re: [GreenKeys] All Electronic Closing
> Message-ID: <1787362362.3039542.1689267890017 at mail.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
>
> I live about 1.5 miles from All Electronics and have been in there quite a few times. Several of months ago I noticed that all of the "Not for Sale" old test equipment was no longer there. Recent reports from around here first said that they were looking for a buyer with no luck but were possibly negotiating with employees to buy it but not successfully so far. A couple of days ago I heard that there might be some arrangement finally made with employees. We will see.
> While in high school (1960) I used to work Sundays at Thrifty Electronics also in Van Nuys on Burbank Blvd. selling tubes, lots of surplus capacitors, and resistors as well as other small parts. Al Ex's (the big boss) cigars were gross and I had to wash off that smell when I finished the day.
> Geoff, K6TFZ
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> ------------------------------
>
> Message: 27
> Date: Thu, 13 Jul 2023 10:23:25 -0700
> From: "Harold Hallikainen" <harold at w6iwi.org>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] All Electronic Closing
> Message-ID:
> <176565e61928abba42fcaf8fd21c680f.squirrel at hallikainen.org>
> Content-Type: text/plain;charset=iso-8859-1
>
> I remember getting printed catalogs from All Electronics (I assume it was
> the same company). It does seem like a difficult business to be in.
> Determining what to price stuff at and how much to pay for the stuff is a
> challenge. And, if you are going to sort stuff, write descriptions, take
> photographs for a printed catalog or a web page... even more work! But I
> do like "saving stuff from the dumpster."
>
> There was an interesting store in Indiana we found while visiting my
> sister-in-law. The store bought truckloads of surplus (appears to be
> mostly retail returns). On Wednesday, everything in the store was $5.
> Then, each day, the price was marked down a dollar. I imagine there was
> some stuff they could not even give away at the end, and I don't know what
> they did with that. But, this "reverse" or Dutch auction has always been
> interesting to me. I've sold several things on Craigs list that way.
>
> Here in Tucson, we are lucky enough to still have an electronic surplus
> store AND an electronics parts house (
> https://elliottelectronicsurplus.com/ ).
>
> Harold
> https://w6iwi.org
>
>
>
>
> ------------------------------
>
> Message: 28
> Date: Thu, 13 Jul 2023 10:31:42 -0700
> From: Jeff Albrecht <jeffa at rodaw.com>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] All Electronic Closing
> Message-ID: <1667067f-d782-d867-df94-53d0bd058631 at rodaw.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Some more OT nostalgia; How about "Sandy's" I think it was in the San
> Fernando Valley, Canoga Park on Saticoy, does anyone remember Saydy's? I
> was just a wee youngin', before the advent of Radio Shack. Good times
> with my Dad on Saturday outings.
>
> ?? - Jeff
>
>
> On 7/13/2023 10:04 AM, k6tfz via GreenKeys wrote:
>> I live about 1.5 miles from All Electronics and have been in there
>> quite a few times. Several of months ago I noticed that all of the
>> "Not for Sale" old test equipment was no longer there. Recent reports
>> from around here first said that they were looking for a buyer with no
>> luck but were possibly negotiating with employees to buy it but not
>> successfully so far. A couple of days ago I heard that there might be
>> some arrangement finally made with employees. We will see.
>>
>> While in high school (1960) I used to work Sundays at Thrifty
>> Electronics also in Van Nuys on Burbank Blvd. selling tubes, lots of
>> surplus capacitors, and resistors as well as other small parts. Al
>> Ex's (the big boss) cigars were gross and I had to wash off that smell
>> when I finished the day.
>>
>> Geoff, K6TFZ
>>
>> ______________________________________________________________
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>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to jeffa at rodaw.com
>
> --
> Jeff Albrecht KF7CRU @jhalbrecht
>
>
> ------------------------------
>
> Message: 29
> Date: Thu, 13 Jul 2023 22:11:38 +0000 (UTC)
> From: k6tfz <k6tfz at aol.com>
> To: "GreenKeys at mailman.qth.net" <GreenKeys at mailman.qth.net>
> Subject: [GreenKeys] Sandy's Electronics
> Message-ID: <1964907896.7764.1689286298268 at mail.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
>
> There was one in Canoga Park on Saticoy as you remember and one very near to me on the southeast corner of Coldwater and Vanowen in North Hollywood (now an Armenian bakery).?
> There is still Apex Electronics on San Fernando Road and near Lankershim in Sun Valley that has all kinds of things - parts and old electronic racks which are rented out to television and movie companies as props with only the lights flashing. That is a giant mess inside and a few employees or owners seem to know where everything is. It's amazing what they have in drawers and boxes in maybe 30-40 thousand square feet of space. A couple of months ago I went there to hopefully get 2 #4 ga insulated or uninsulated butt end connectors. It took someone all of maybe 15 seconds to come up with them at 50 cents each. Wire, tubes, mechanical things . . . it's always a surprise that they have it and a lot more.
> Geoff, K6TFZ
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> ------------------------------
>
> Message: 30
> Date: Thu, 13 Jul 2023 19:54:44 -0400
> From: Pete G <craneplc at gmail.com>
> To: GreenKeys at mailman.qth.net
> Subject: [GreenKeys] Kleinschmidt TT-4/TG Teletype
> Message-ID:
> <CAB=DZVqp3EphRH3rxmLKdjkByd=f4tzezOnA4uyAn7Zp4vAk+A at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Saw this while browsing.
> Appears to be in good condition. Is in Florida.
> Includes video of it running open
> I don't have any additional information.
> https://www.ebay.com/itm/374807422748
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> ------------------------------
>
> Message: 31
> Date: Sat, 15 Jul 2023 15:40:59 -0400 (EDT)
> From: RODNEY HOGG <radio_man at wbsnet.org>
> To: Greenkeys <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] Model 28ASR etc
> Message-ID:
> <66925552.8879470.1689450059165.JavaMail.zimbra at wbsnet.org>
> Content-Type: text/plain; charset="utf-8"
>
> It appears no-one is interested in coming to Western Kansas for the Model 28ASR,
> and boxes/rolls of paper and tape. Have had NO responses whatsoever. Next step
> will be to have salvage yard pick it up, Will get a few bux for it, they said can strip it of
> wiring and motor and scrap the steel. Then take the paper to the land fill. I'll hold
> off for a while before I take those measures. I really hate to do that. I have a lot
> of other stuff to dispose of also, mil gear, ARC-5. etc, most going to auction or scrap
> yard.
>
> 73,
> Rod
> K0EQH
> Scott City KS
>
>
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> ------------------------------
>
> _______________________________________________
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> GreenKeys at mailman.qth.net
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>
> End of GreenKeys Digest, Vol 234, Issue 5
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