[GreenKeys] ITTY to ASR33

[Rob Jarratt]

I don’t seem to be able to find a PK232, but in any case, I think I am going to look into using minimodem and possibly adapting it for my needs. I rather like the idea of a software-based solution anyway.

 

Thanks for all the inputs. Lots to look into.

 

Regards

 

Rob

 

From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net> On Behalf Of David Wade
Sent: 06 October 2024 17:02
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] ITTY to ASR33

 

Rob,

Sorry, I disposed of a  PK232 a while ago but I do have a couple of spare RTTY decoders which I don´t use. Perhaps one of those will suffice, but I am in Spain for a couple of weeks so can´t check

Dave

On 06/10/2024 16:29, Jeffrey Golas wrote:

I keep forgetting about these. They can also be used in pairs as a converter; send ASCII in, have it talk RTTY to another (or a TU) as an ascii to baudot adapter. 





On Oct 6, 2024, at 10:28 AM, John Lawson  <mailto:john at tubetestingpros.com> <john at tubetestingpros.com> wrote:

 

 

  I hve used an AEA PK-232 to do this. The 33 is connected to the PK-232’s console port, which is configured for 110 ASCII. (The 232 has an ‘autodetect’ feature which will set itself up for the correct terminal device)

The the 232 is commanded into Baudot mode (By typing ‘BA’ on the 33) and incoming AFSK will appear on the console device. It’s quite wierd to have the ASR33 clacking away at 45 baud – less than half it’s “normal” speed – but it works well and I have used it at several demos I’ve run with Baudot and ASCII machinery running in parallel at the same time.  I’ve also decoded Morse this way.

 

I know that there were several other similar devices available which also used an RS-232 / ASCII console and decoded various signal on their audio inputs. The PK-232 is the one I’m familiar with and seems to work well.  And the are not hard to find – I’ve had several of them over the years. Documentation is also archived in various places.  Look for HAL, Heathkit, Kantronics, etc.

 

Finally one could use a USB – to Serial converter and run MTTY, FLDIGI, or similar, and send the output to the ‘serial’ port ad thus to the ASR33

 

 

Cheers

John KB6SCO

Carson City

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