The good news is that these UGC-136BX models do support 45 baud (60wpm). 

The AX model that I have only goes to 50 baud, and we didn’t know about the BX until the boxes were opened. 

Nick England K4NYW
www.navy-radio.com


On Thu, Jul 24, 2025 at 4:16 PM Ray Fantini via groups.io <RAFANTINI=salisbury.edu@groups.io> wrote:

Think with all this talk about the UGC-136 stuff and the problems associated with them being 75 WPM or above this may be useful. Couple years back I was playing around with MX terminals that were 75 WPM  ASCII and built up converters around AY-5-1031 uart chips to do the conversion from 60 to 75 words per minute, also had to do language between five bit to eight bit but don’t think that will be an issue with the 136.

If anyone is interested in any more background information let me know, documented the entire project at the time.

You can see the MX terminal copying RTTY at:

 

https://www.youtube.com/watch?v=tMiDnn5a_xM&t=9s

 

Attached are two drawings showing the receive side and send side of the uart, remember you can do it all on one chip being each uart has a receiver and transmitter. I think the data levels will interface directly but never trued it being that I have never seen a 136 myself.

 

Ray F/KA3EKH

 

 

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