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Christmas '18 Project: The Fisher FM-50-B
#4

Thanks, Nathan. I actually have that one (I have a rough FM-50 out in the garage too...trying to decide whether to fix it up, or not). I'll take a look at it. Obviously the FM-50 schematic will have no MPX detector but might have some useful info if it doesn't work upon initial power up.

This evening, I accomplished the following:

* Replaced the selenium rectifier with a terminal strip and individual 1N4007 diodes. I threw the old selenium rectifier in the trash; it made a sound as it hit the bottom of the can, so I know it was bad. Icon_smile
* Replaced the axial 20 uF, 250V electrolytic with a new Nichicon axial 22 uF, 350V.
* Replaced the death cap with a new X1/Y2 safety cap.

Still to come: Replacing two 0.1 uF dog turd caps with new yellow film, and the 8 uF axial electrolytic in the ratio detector circuit. Then comes the MPX decoder, and restuffing the electrolytic.

I won't finish it tomorrow. Probably sometime in January.

--
Ron Ramirez
Ferdinand IN





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