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Loud buzz in National NC60
#5

So if you really want to dig into this thing here's a few ideas.

Lose the 35W4 and replace it w/a complementary output tube. Resize the hole where the 12av6 tube was to a 9pin socket and replace w/a 12ax7. This will be your 1st audio/phase inverter for the p/p output. Add a 1N34 for the detector diode. Resize hole for 6BA7 mixer 9pin socket and add same. Much quieter and more gain than the 12be6.

It won't turn your star roamer into a HRO 60 but it will give it a bit of a step up.

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry


Messages In This Thread
Loud buzz in National NC60 - by pbunn - 01-14-2024, 02:34 PM
RE: Loud buzz in National NC60 - by Radioroslyn - 01-14-2024, 06:24 PM
RE: Loud buzz in National NC60 - by David - 01-14-2024, 06:50 PM
RE: Loud buzz in National NC60 - by pbunn - 01-15-2024, 08:57 PM
RE: Loud buzz in National NC60 - by Radioroslyn - 01-15-2024, 11:27 PM
RE: Loud buzz in National NC60 - by pbunn - 01-17-2024, 10:42 PM



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