[GreenKeys] Handset for teletype model 28

[hwhall@aol.com]

It's not clear to me... are you hoping to feed ITTY tones into the phone coupler & the coupler to drive the teletype? Are you sure ITTY is sending out tones that are compatible with the phone coupler? (I haven't used ITTY yet.) IIRC, the phone line teletype operations used different tones than are commonly used in on-the-air AFSK RTTY. There may be a tone mismatch that's causing the poor copy.

Wayne
WB4OGM

On Wednesday, June 3, 2026 at 09:18:53 PM MDT, Gavin Wuchter via GreenKeys <greenkeys at mailman.qth.net> wrote: 

hello again!

I am having some success with my teletype model 28 ASR, I got it power on and typing! Very exciting, now I would love to get it to print information, like the ITTY broadcast. I currently have a phonetype coupler with it that I put together with a cell to Jack since that is the only thing I have on hand at the moment, but it being a cheap Bluetooth converter the quality isn’t near enough for the teletype to decode. but the cell to Jack also doesn’t natively play audio through its speaker, but with what I was able to put through it my model 28 was only able to get a few characters at most. So I am trying to find a way to if possible play the audio through a handset to get it to print information. 

Here is one option I have seen:
https://payphone.com/handset-with-3.5mm-trs-audio-jack-hs-trrs-1.html


I don’t know what other options are out there for me and this machine, 
I have owned other model 28s and also 15s and 33s. But this is the first time I am really trying to do something cool with a teletype.

For the handset I listed above I would plan to plug it into a laptop to get the signal through it,

But let me know what other people have tried and done before.

Thank you all in advance!

Sincerely,
Gavin Wuchter 

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