[GreenKeys] Does anyone have any experience using the L-Com RS232 to Current Loop Converter with a Mod 33 Teletype?

[tony.podrasky]

GA OMs;

MY 35-KSR was 20ma (current loop).

I bought an adapter to convert the RS-232/EIA to 20ma.

I had to play with the jumpers in the converter as well
as making sure that the wires were connected correctly
because if they were flipped it didn't work - and I don't
recall if it ran "open" or just didn't do anything.

UE,
K2EAA - TONY
NNNN
ZCZC

On 10/19/2018 02:46 PM, john at toebes.com wrote:
> Ok I’ve gotten my Current Loop Converter adapter (
> http://www.l-com.com/serial-converters-controller-cards-economy-rs232-to-current-loop-converter-with-4-pin-terminal-block
>
>  ) and what I thought was the obvious way of connecting it doesn’t
> seem to result in success.
>
> I’ve connected
>
> 1 <-> TTY Send pin 3
>
> 2 <-> TTY Send pin 4
>
> 3 <-> TTY Receive Positive Pin 7
>
> 4 <-> TTY Receive Negative Pin 6
>
> Switches:
>
> 20ma                         DCE
>
> RX Passive               TX Passive
>
> I’ve got a nice RS232 Mini-Tester with LEDS to give me a good
> indication of communication and every combination of Null modem/RS232
> Gender changer available, connecting it to a USB->RS2-2 adapter.
>
> So far I’ve not had any success getting an indication that things are
>  communicating.  Has anyone else used this particular converter with
>  success and can offer any advice?
>
> Thanks in advance!
>
> * John Toebes
>
>
>
> ______________________________________________________________
> 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
>

-- 
       Seen on a sweatshirt:

       I am a bomb technician.
If you see me running, try to keep up.