08-30-2023, 11:19 AM
After looking at Mike's coil I'd like to revise my turns count number down to 24 rather than 50. The 86 and 87 use the same coil all 3 of them. For what it's worth pn 3075A.
Both sets a Neutrodyne. That means that it uses neutralize triodes as rf amplifier. The 87 is a Neutrodyne Plus [Image: https://philcoradio.com/phorum/images/sm...prised.gif]
It's not uncommon to find what is called green dot disease. The demise of the copper in the winding of the coil. Sometime it's a small dot you can see thru the wax. Other times the winding will show a high resistance.
Both sets a Neutrodyne. That means that it uses neutralize triodes as rf amplifier. The 87 is a Neutrodyne Plus [Image: https://philcoradio.com/phorum/images/sm...prised.gif]
It's not uncommon to find what is called green dot disease. The demise of the copper in the winding of the coil. Sometime it's a small dot you can see thru the wax. Other times the winding will show a high resistance.
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
