Hi Eric,

Thanks for your suggestion and I did consider just running the motor of the 50 Hz mains supply, but most of the advice seems to be "don't do it" because the motor will run hot etc. leading to early failure. I had the inverter so it was no problem to run the machine on 60 Hz but it's not an elegant or a very efficient solution. The baud rate conversion is no problem but I'm more concerned about the machine reliability. Once I get the machine working properly I'll try running it at 50 Hz and see what happens...

Regards

Dale

On Tue, 14 Oct 2025 at 18:54, eric <epvgk@limpoc.com> wrote:

On 2025-10-12 16:54, Dale Hughes wrote:

I'm running it on a 75 baud 60 mA current loop and at 110 VAC 60 Hz through a sine-wave inverter because power here is 50 Hz.

If I'm not mistaken, if you're just echoing in a loop you should be fine on local 50hz power, you'll just be both sending and receiving at 62.5 baud rather than 75. It would of course be a problem if trying to copy RTTY over the radio, or talking to a fixed 75 baud interface from somewhere else.

If you end up using a computer interface of some sort you can probably just set it to 62.5 baud and be fine.