[GreenKeys] XR2211 demodulator circuit boards?

Steve Garrison steve.n4tty at gmail.com
Sun Jan 24 12:18:44 EST 2021 

Well, right now I wouldn't be able to tackle that.  That is why I sent the note to Eric about the Gerber files.  Those I might be able to squeeze in with a shoehorn.

Steve G./N4TTY0

-----Original Message-----
From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net> On Behalf Of Don Cunningam
Sent: Sunday, January 24, 2021 9:53 AM
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] XR2211 demodulator circuit boards?

Steve,

I have a set of boards (TU and power supply) that was sold by a company called PEMCO, if my old memory is correct for the ST-5A which was Irv Hoff's ST-5 with autostart added.  I would donate them if you think you have somewhere that could duplicate them so others could build that.  I also have the old Hoff articles from an early QST that talks about tuning toroid coils and if followed on this TU, it is nearly as good as the HAL ST-6 was!!!  If that cant be done, Eric you can have these boards and I'll dig up some toroids to build it.  I don't have a TON of the toroids, but I have some left from MANY years of building TU's for Navy MARS folks back in the 70's,  I found this set of Pemco boards and info for sale and bought it a few years back to share with someone.  If you can do this, Steve, let me know and I'll ship the boards to you.

73,

Don, WB5HAK

On 1/24/2021 4:31 AM, Steve Garrison wrote:
> Eric,
>
> If you wouldn't mind sending the gerber files or any other files I'd 
> appreciate it.  I've been having several other boards that I have 
> designed for robot project I'm involved with made, so I could add the 
> demod board to the list.  Is the 2211 still readily available?
>
> Steve G./N4TTY
>
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net 
> <greenkeys-bounces at mailman.qth.net>
> On Behalf Of epvgk at limpoc.com
> Sent: Sunday, January 24, 2021 3:58 AM
> To: hwhall at compuserve.com
> Cc: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] XR2211 demodulator circuit boards?
>
> On Sun, Jan 24, 2021 at 08:46:10AM +0000, hwhall at compuserve.com wrote:
>> I'd encountered some of those pages when I was googling but still no 
>> PCB
> artwork. If someone has already laid them out, I could skip reinventing it.
>> WayneWB4OGM
> Here's the one I did that got manufactured that people on the list 
> have a bunch of.
>
> https://www.heepy.net/index.php/RTTY_demodulator_using_NJM2211
>
> I can dig up gerbers or whatever if you want!
>
> eric
>
>> -----Original Message-----
>> From: Harold Hallikainen <harold at w6iwi.org>
>> To: greenkeys at mailman.qth.net
>> Sent: Sat, Jan 23, 2021 11:19 pm
>> Subject: Re: [GreenKeys] XR2211 demodulator circuit boards?
>>
>>
>>> Are there any printed circuit boards for building an XR2211 based 
>>> RTTY demodulator? Â Google shows me all kinds of articles from 
>>> complex to over-simplified but doesn't lead me to any PCB artwork or
> vendors.
>>> I'm thinking I might build a demod to run a Model 15 from a laptop 
>>> running MMTTY. The program only outputs tones (no on-off output to 
>>> key a loop
>>> directly) so a PLL demod should be fine since noise won't be an 
>>> issue. Or should I look at something even smaller/simpler?
>>> Thanks!WayneWB4OGM__________________________________________________
>>> ____________
>> There's an evaluation board at
>> https://media.digikey.com/pdf/Data%20Sheets/MaxLinear%20PDFs/XR-2206-
>> 1 1-12_Man.pdf . I'd be tempted to wire wrap it, though.
>>
>> Several products I did using the XR2211 are at
>>
>> http://bh.hallikainen.org//wiki/uploads/HaroldHallikainen/20130416125
>> 3
>> 39_Part5.pdf
>>
>> http://bh.hallikainen.org//wiki/uploads/HaroldHallikainen/Harold_018.
>> p
>> df
>>
>> http://bh.hallikainen.org//wiki/uploads/HaroldHallikainen/20130416125
>> 3
>> 39_Part1.pdf
>>
>> http://bh.hallikainen.org//wiki/uploads/HaroldHallikainen/Harold_011.
>> p
>> df
>>
>> http://bh.hallikainen.org//wiki/uploads/HaroldHallikainen/20130416125
>> 5
>> 53.pdf#page=11
>>
>> The XR2211 is a fun chip. Before that, I used the NE565, but the
>> XR2211 includes the data comparator, a carrier detect, etc. The 
>> XR2206 is also a nice chip. It will generate a square wave, triangle 
>> wave, and
> sine waves.
>> It can do linear FM, AM (including double sideband suppressed 
>> carrier), and FSK. The FSK circuit has a logic input that switches 
>> between two timing resistors. But, during the transition, the 
>> frequency goes to zero for a very short time. I'd probably use the 
>> linear FM circuit and drive it with the data after running it through 
>> a low pass filter to limit bandwidth. It IS a nice chip, though. I 
>> used it as an upconverter (local oscillator and mixer) to upconvert 
>> subcarriers on FM broadcast stations to
>> 455 kHz where the signal then went through ceramic filters, IF 
>> amplifier, and a ceramic discriminator.
>>
>> Fun stuff!
>>
>> Harold
>> https://w6iwi.org
>>
>>
>> --
>> FCC Rules Updated Daily at http://www.hallikainen.com Not sent from 
>> an iPhone.
>> ______________________________________________________________
>> 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 
>> hwhall at compuserve.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 
>> epvgk at limpoc.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 
> steve.n4tty 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 
> wb5hak at arrl.net

--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

______________________________________________________________
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 steve.n4tty at gmail.com

More information about the GreenKeys mailing list