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Which tuner to get and getting the most from it. Thank God, for the radio!

Yes, the 6V4/EZ80 is the rectifier tube




Glad that replacing the rectifier reduced your hum. I would also consider replacing the 'hot to the touch' quad (can) capacitor in the power supply, either with a direct replacement, or preferably I'd follow Cougar's advice and see if SDS Labs (link below) still has any of their FM-3 power supply boards for sale, although he no longer lists them.

There's also a site called Dynaco Designs offering the cap boards, here:

https://dynacodesigns.wordpress.com/fm-3-kits-and-parts/

Also, if you're soldering anyway, you might consider replacing R-11 and R-13 on PC-8 (both 10K @ 2 watt) with 5 watt equivalents. I believe it was the late Bill Thomas who said here on the Asylum:

"On the FM3, one resistor as-supplied is 2-watts, and runs at about 1.9999-> watts. Going to 5 watts is a very good thing."




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