[GreenKeys] Electrically Noisy Model 15 KSR

[Mike Douglas]

You see the 92222 filter mounted on top of the keyboard switch contacts during the first 10 seconds of this video: https://www.youtube.com/watch?v=mSr5bgyCq-s

Mike

> On Nov 13, 2021, at 12:56 PM, Mike Douglas <deramp5113 at yahoo.com> wrote:
> 
> 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 <n9hrt at sbcglobal.net> 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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