Yesterday, 08:20 AM
Arran
Yes, odd.
This said, one of the choke (the 2200 ohm one) quit, and it was working with overload (it is a 10mA choke that potentially saw 12-13mA current).
They might've wanted to really filter the output stage power to possibly diminish hum (I am yet to find out what it is) and so they used a separate LC with a lower DCR/higher current capacity choke, but they might've also wanted to decouple the output from the RF/OSC stage, so they used two.
Talking about odd: using the battery for the 1st Audio bias, how'bout it?
And yes, the bushing is, I think, a phenolic-impregnated fiber. So my nylon one should work just fine.
Yes, odd.
This said, one of the choke (the 2200 ohm one) quit, and it was working with overload (it is a 10mA choke that potentially saw 12-13mA current).
They might've wanted to really filter the output stage power to possibly diminish hum (I am yet to find out what it is) and so they used a separate LC with a lower DCR/higher current capacity choke, but they might've also wanted to decouple the output from the RF/OSC stage, so they used two.
Talking about odd: using the battery for the 1st Audio bias, how'bout it?
And yes, the bushing is, I think, a phenolic-impregnated fiber. So my nylon one should work just fine.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
