[GreenKeys] Teletype Clothing
Jim Hammock
ki0dn at hotmail.com
Sun Nov 16 04:54:58 EST 2014
Don,
Heck yeah!!!!!!! New address, new shack, soon new (to me) 28 ASR . . . need new QSL card with new hat to hide receding hair line,
Regards,
Jim Hammock
KI0DN
> On Nov 15, 2014, at 23:37, greenkeys-request at mailman.qth.net wrote:
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> Today's Topics:
>
> 1. Teletype clothing (Don Robert House K9TTY)
> 2. Re: Teletype clothing
> (Ed Sharpe Archivist for SMECC via GreenKeys)
> 3. Re: printing to KSR 28 was (John Nagle)
> 4. Re: Teletype clothing (Chuck)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 15 Nov 2014 22:48:06 -0600
> From: Don Robert House K9TTY <62.5milliamps at gmail.com>
> To: Greenkeys <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] Teletype clothing
> Message-ID: <4DA7438C-7CE8-4937-9890-3881F82C7722 at gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Is there still any interest in these caps?
>
> Just wondering
>
> Don K9TTY
>
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> ------------------------------
>
> Message: 2
> Date: Sun, 16 Nov 2014 00:06:01 -0500
> From: Ed Sharpe Archivist for SMECC via GreenKeys
> <greenkeys at mailman.qth.net>
> To: 62.5milliamps at gmail.com, greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Teletype clothing
> Message-ID: <6e858.b084fe6.41998ab8 at aol.com>
> Content-Type: text/plain; charset="us-ascii"
>
> sure Don we would add one to the display!
>
> Ed# _www.smecc.org_ (http://www.smecc.org)
>
>
> In a message dated 11/15/2014 9:48:30 P.M. US Mountain Standard Time,
> 62.5milliamps at gmail.com writes:
>
> Is there still any interest in these caps?
>
> Just wondering
>
> Don K9TTY
>
>
>
>
>
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> ------------------------------
>
> Message: 3
> Date: Sat, 15 Nov 2014 20:26:03 -0800
> From: John Nagle <nagle at animats.com>
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] printing to KSR 28 was
> Message-ID: <5468275B.7080300 at animats.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
>
>
>> Date: Fri, 14 Nov 2014 18:57:23 -0800
>> From:epvgk at limpoc.com
>> To: Jim Haynes<jhhaynes at earthlink.net>
>> Cc: John Foust<jfoust at threedee.com>, Green Keys
>> <greenkeys at mailman.qth.net>
>> Subject: Re: [GreenKeys] printing to KSR 28 was Re: OT: Radio Shack
>> near bankruptcy
>> Message-ID:<20141115025723.GA26931 at limpoc.com>
>> Content-Type: text/plain; charset=us-ascii
>>
>> On Fri, Nov 14, 2014 at 08:26:07PM -0600, Jim Haynes wrote:
>>>> I'm not familiar with the Black Box things being offered, but there
>>>> is this caution. Some 20/60 ma devices like Models 32, 33 and 35
>>>> operate at low voltage, so the converter circuit is pretty simple.
>>>> Models 15, 28, etc. normally operate with much higher voltage, so
>>>> the converter has to be able to withstand the voltage.
>>>>
>>>> We used to use bipolar transistors like MJE-340 but then the "sold
>>>> state relay" chips became available, offering both high voltage and
>>>> optical isolation. I've attached someone's document on the subject;
>>>> ask me by email if the attachment doesn't come through the system.
>>>>
>>>> Jim W6JVE
>> Haha, I'm that someone.
>> it's on my site athttp://heepy.net
>
> I have a simple board 60mA loop design using an optoisolator here:
>
> http://www.aetherltd.com/connecting.html
>
> There are lots of optoisolators that work. The Omron
> G3VM-401B, around $2 each, is known to work. I recommend
> using some R/C snubbing as shown if you're using a Model 14
> or 15; the inductive kick from the selector magnet can
> be a few hundred volts, and has to go somewhere. The Omron optoisolator
> can withstand 320V continuous.
>
> Unless you want a polar relay for historical reasons,
> don't bother.
>
> This still requires a 120VDC supply and a 2K ballast
> resistor. There are some more modern designs that generate
> the 120VDC from 5VDC with a boost converter.
>
> If you just need a 20mA current loop, buy a commercial
> converter.
>
> John Nagle
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sat, 15 Nov 2014 21:37:15 -0800
> From: "Chuck" <j-mcclurg at sbcglobal.net>
> To: <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] Teletype clothing
> Message-ID: <003201d0015f$6191cb50$8f01a8c0 at communiceykom5>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
>
> Yes Don I would like one......................................
>
> Chuck
> N7UVZ
>
>
>
> ----- Original Message -----
> From: Ed Sharpe Archivist for SMECC via GreenKeys
> To: 62.5milliamps at gmail.com ; greenkeys at mailman.qth.net
> Sent: Saturday, November 15, 2014 9:06 PM
> Subject: Re: [GreenKeys] Teletype clothing
>
>
> sure Don we would add one to the display!
>
> Ed# www.smecc.org
>
> In a message dated 11/15/2014 9:48:30 P.M. US Mountain Standard Time, 62.5milliamps at gmail.com writes:
> Is there still any interest in these caps?
>
> Just wondering
>
> Don K9TTY
>
>
>
>
>
> ______________________________________________________________
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>
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