11-05-2016, 11:40 AM
Never have had good luck swapping 6C6 or 6D6's for 77 or 78's. Yes the pin out is the same but they seem hard to tame, getting them to work without oscillating has been a problem for me. I think the 77-78's where more popular haven't seen many 6C orD6's used in broadcasts set with the exception of low end TRF sets. They do turn up in communications receivers.
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
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
