10-31-2016, 02:55 PM
(10-28-2016, 07:34 PM)Radioroslyn Wrote: >What should I hear out of the speaker?
Depends. If the have the modulation turned off you won't hear much at all. With it on you should hear a 400cy tone.
I would leave the grid cap on the 6A7 and connect the generator to it. Keep the generator's output turned down so you can just hear the tone. As you adjust the IF trimmers for the loudest tone in the spkr.
What are you using for your service info?? Please post link to it as the Rider's is for an early model.
http://www.nostalgiaair.org/pagesbymodel...013793.pdf
400cy tone, that is what I expected but not happening. With the frequency generator set to int. mod./AF Out I can use my (modern) AM radio to listen to the generated frequency and hear the 400cy tone and zero beat it almost precisely on the set frequency.
The grid cap on my 6A7 was slightly loose. I ordered a nos 6A7 and will retry when it arrives. Will also try it with the grid clip connected.
I believe this is the correct procedure for the run 7 Model 60 -
