[GreenKeys] RS232 to TTY Loop Boards

Sun Feb 15 17:57:06 EST 2015

Les,
At the very bottom of John's Aetheric Message webpage, he mentions that the 
original opto HSR-312L is obsolete and offers the Omron G3VM-401B as a pin 
compatible replacement which has been successfully used by Steve Garrison.

73
Alf
G3WSD

----- Original Message ----- 
From: "Lester Veenstra" <lester at veenstras.com>
To: "'Bob Camp'" <kb8tq at n1k.org>
Cc: <greenkeys at mailman.qth.net>
Sent: Sunday, February 15, 2015 10:19 PM
Subject: Re: [GreenKeys] RS232 to TTY Loop Boards

Bob:
  Is there a current part that is a better substitute for the HV opto
isolator, even if a PCB redesign would be required? (single part or
multiple parts)
   Les

Lester B Veenstra MØYCM K1YCM W8YCM
lester at veenstras.com

US Postal Address:
5 Shrine Club Drive
HC84 Box 89C
Keyser WV 26726
GPS: 39.336826 N 78.982287 W (Google)
GPS: 39.33682 N 78.9823741 W (GPSDO)

Telephones:
Home: +1-304-289-6057
US cell +1-304-790-9192
UK cell +44-(0)7849-248-749
Guam Cell: +1-671-929-8141
Jamaica: +1-876-456-8898

This e-mail and any documents attached hereto contain confidential or
privileged information. The information is intended to be for use only by
the individual or entity to whom they are addressed. If you are not the
intended recipient or the person responsible for delivering the e-mail to
the intended recipient, be aware that any disclosure, copying, distribution
or use of the contents of this e-mail or any documents attached hereto is
prohibited.

-----Original Message-----
From: Bob Camp [mailto:kb8tq at n1k.org]
Sent: Sunday, February 15, 2015 4:34 PM
To: lester at veenstras.com
Subject: Re: [GreenKeys] RS232 to TTY Loop Boards

Hi

Just a comment on that board:

In the configuration shown, the opto is rated to 250V. There is a drop in
part (the HSR412L) that is rated to 400V. All of
them are listed as "obsolete". You will be paying scalper prices for them.
Even so I'd go for the 412 rather than the 312.

With a 125V loop supply, the magnets fly back above 250V to ground pretty
fast. Neon bulb pairs across the magnets light up
pretty well ..

Bob

> On Feb 15, 2015, at 4:03 PM, Lester Veenstra <Lester at veenstras.com> wrote:
>
> Before I order some, does anyone have any of these boards available,
> populated or un-populated?
> http://www.aetherltd.com/connecting.html
>
> Lester B Veenstra  MØYCM K1YCM W8YCM
> lester at veenstras.com
>
> US Postal Address:
> 5 Shrine Club Drive
> HC84 Box 89C
> Keyser WV 26726
> GPS: 39.336826 N  78.982287 W (Google)
> GPS: 39.33682 N  78.9823741 W (GPSDO)
>
>
> Telephones:
> Home:                     +1-304-289-6057
> US cell                    +1-304-790-9192
> UK cell                    +44-(0)7849-248-749
> Guam Cell:              +1-671-929-8141
> Jamaica:                 +1-876-456-8898
>
> This e-mail and any documents attached hereto contain confidential or
> privileged information. The information is intended to be for use only by
> the individual or entity to whom they are addressed. If you are not the
> intended recipient or the person responsible for delivering the e-mail to
> the intended recipient, be aware that any disclosure, copying,
distribution
> or use of the contents of this e-mail or any documents attached hereto is
> prohibited.
>
>
>
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net
> [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of John Nagle
> Sent: Saturday, February 19, 2011 12:14 PM
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] RS232 to TTY Loop
>
>> From: Wa3frp<wa3frp at aol.com>
>> Subject: [GreenKeys] RS232 to TTY Loop
>>
>> I was wondering if anyone has a solution for me.
>> I am looking to key my 60 ma teleprinter loop from my laptop using the
> RS-232 interface.
>
>    Sure.  See
>
> http://www.aetherltd.com/connecting.html
>
> John Nagle
> ______________________________________________________________
> 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
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> 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
>
> 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

______________________________________________________________
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

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 

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