The Army units had an RFI suppressor on the keyboard. You can see the filter network in these drawings: https://deramp.com/downloads/teletype/Model%2015/TG-7-B%20Wiring%20Diagram.pdf

Mike

On Nov 13, 2021, at 11:18 AM, JOHN MCCARTY <[email protected]> wrote:



Keepers of the green keys;

   I have a model 15 KSR that used to be in a private home for TTD service. I got it off Craig's list some time back.

We use the machine as a demo unit at events and it works well. The crowds are always drawn to it. Here in Chicago we

have a 2 meter FM channel we run these on. The problem is we usually have other radios running at these events and

when the keyboard is in use it really rips up 20 meters. I ran a test using just one of my stations RX's and it was

far worse on 20 that 80 or 10 meters.

Is there somewhere I can hang a cap or two and quite things down a bit?

Thanks for your help

John n9hrt

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