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Dynaco FM-3 revival
#1

Well, it's been sitting on my bench taking up space and it's time to get it up and running. Abay find. Wasn't expensive. Found 2 actually, but one is missing most tubes, etc and looks like might have taken a lightning hit at some point, so for the most part - it's parts. The one I'm reviving is complete with all the tubes, so I brought it up on a dim bulb and much to my surprise, it worked! Not stellar, but I could get some stations. I ran it long enough to learn it doesn't drift and the filter can gets pretty warm. I also learned that it had been dropped or something and the whole chassis was bent around the power trans and the tuner didn't work the best. I straightened the chassis best I could and then the tuner wouldn't work like it should. There's a shaft inside a shaft, where the inside shaft is hooked to the tuning knob and the outside shaft is connected to the dial. The two didn't interact anymore! Some of the ball bearings were coming out of the end of the shaft on the tuner too, so I did a swap, since the tuner on the parts chassis seemed to work. Got that swapped last night and it worked, but wasn't very sensitive. I did some light adjusting on the tuner screws and improved it a lot, but the stations are off and not sure how to align those. I don't have much experience aligning tuners, so I stopped there until I can get some info.

The next thing was to redo the filter can to avoid either a ka-boom or that magic smoke. Since I didn't happen to have a suitable can laying around and really didn't want to spend $50 ordering one, I did the individual caps. Probably not the prettiest thing but it's not for looks either, and it worked. So - got that done and it works pretty good overall, but think it could use an alignment touch up. I also need to test tubes to make sure I don't have any weak ones messing up things. Looks like it's got some hours on it but don't see evidence of much tinkering other than finding some "Groove Tubes" in those shields. 

I included a picture of the knobs - they are quite dull. Does anyone know a way to brighten up those to look better? Something to soak them in maybe?

   
   
   
   
   

If I could find the place called "Somewhere", I could find "Anything" Icon_confused

Tim

Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44


Messages In This Thread
Dynaco FM-3 revival - by TV MAN - 04-28-2026, 09:24 AM
RE: Dynaco FM-3 revival - by TV MAN - 04-28-2026, 09:30 AM
RE: Dynaco FM-3 revival - by morzh - 04-28-2026, 10:26 AM
RE: Dynaco FM-3 revival - by TV MAN - 05-01-2026, 12:10 AM
RE: Dynaco FM-3 revival - by morzh - 05-01-2026, 02:26 PM
RE: Dynaco FM-3 revival - by MrFixr55 - 05-02-2026, 01:29 AM
RE: Dynaco FM-3 revival - by TV MAN - 05-25-2026, 12:10 AM
RE: Dynaco FM-3 revival - by morzh - 05-25-2026, 11:49 AM
RE: Dynaco FM-3 revival - by TV MAN - 05-27-2026, 10:21 AM
RE: Dynaco FM-3 revival - by morzh - 05-27-2026, 10:24 AM
RE: Dynaco FM-3 revival - by radiorich - 06-16-2026, 01:28 AM
RE: Dynaco FM-3 revival - by TV MAN - 06-22-2026, 02:38 PM
RE: Dynaco FM-3 revival - by radiorich - 06-22-2026, 04:13 PM
RE: Dynaco FM-3 revival - by TV MAN - 06-26-2026, 10:50 AM
RE: Dynaco FM-3 revival - by TV MAN - 06-26-2026, 10:18 PM
RE: Dynaco FM-3 revival - by MrFixr55 - 06-27-2026, 12:30 AM
RE: Dynaco FM-3 revival - by radiorich - 06-27-2026, 01:55 AM
RE: Dynaco FM-3 revival - by TV MAN - 07-05-2026, 03:17 PM
RE: Dynaco FM-3 revival - by Arran - 07-06-2026, 08:21 PM
RE: Dynaco FM-3 revival - by TV MAN - 07-08-2026, 02:02 PM



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