Author Topic: FM-33 radio  (Read 126 times)

TC Chris

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FM-33 radio
« on: March 06, 2019, 11:06:28 PM »
I've had the FM-33 radio sitting on end in a corner of the kitchen for quite a while.  It needs new filter caps, as when I plugged it in a couple years back it sounded hummy-grainy,  I was sort of hoping that my capacitor stash would hold whatever it needed.  So I took it out to the shop, on the table saw workbench, and took it apart.  As usual, there were a coupe hidden screws to slow em down.  When it was apart, I identified the caps' values and checked the stash.  Nope, not a one.  Mouser, here we come.  Lately I have been buying extras whenever I order parts like that so in the future when I need one, it will be there.  I have finally figured out the Mouser online ordering system so it's not too had.  The radio uses an 1893 lamp, and that's likely dead too, so  ordered a bunch of those.

The radio has a 6x9" speaker and a little cone tweeter.  The amplifier output transistors are push-pull and fairly sizeable.  It's a stereo radio but the second speaker unit wasn't with it when I got it. I'll make do with a misc. one until I get it working, and then maybe make up one to match the radio's shape and style. The chassis and cabinet both appear to be of Asian build.  The amplifier chassis caps are Nichicons.  I'm hoping that the Nichicons are still functional.  The power supply caps are less elegant. 

Now I've got to wait for the caps to arrive.  That may give me time to find a place for the GE radio in the house.   I got my little Zenith 6G05 table radio going after its rectifier lost 1/2 of its center-tapped heater.  The tube tester apparently only lights up the higher-voltage half, so it didn't show up as dead when I tested.  In the radio, however, it interrupted the series-string heater line and nobody lighted up.  A  new 35W4 solved the problem.

Chris Campbell

Bill

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Re: FM-33 radio
« Reply #1 on: March 07, 2019, 01:23:13 PM »
I need to ask Chris, what's a FM 33 radio?

Bill

TC Chris

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Re: FM-33 radio
« Reply #2 on: March 08, 2019, 12:42:59 AM »
Magnavox tabletop stereo radio (originally had separate 2nd speaker,; mine came without).  Solid-state.

Chris Campbell

Bill

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Re: FM-33 radio
« Reply #3 on: March 08, 2019, 11:51:59 PM »
Thank you, and very nice.

Bill

TC Chris

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Re: FM-33 radio
« Reply #4 on: March 09, 2019, 10:36:20 AM »
Mouser informed me that they had shipped my order of filter caps & dial lamps for the radio, so maybe it will be up and running soon.  It has a phono input (likely high-level, as for a ceramic cartridge, and without equalization) so I should be able to run other devices through it.  I have a few options for the 2nd channel speaker and will see which works best.  I may have to make up an enclosure and pop a 6x9 into it.

Chris Campbell