National SW-54 Thoughts

[Dubis7]

Finally back with a major update.

Regarding the SG-8: It's finally working. It turns out that the generator fine the whole time, but my probe had an intermittent break in the cable. A new probe sorted it out, and I've been able to get steady and strong RF and AF output.

So now, back on the SW-54. I started at the input pin of the 50C5 (pin 5)and worked my way backwards. I got a steady, strong tone from Pin 5 of the 50C5, pin 7 of my 12AV6 (which is output but it means my network is good) and pin 5/6 of the 12AV6.

I ran into trouble at my 2nd IF transformer. Injecting the AF signal to pin 6 of the transformer block gave me a loud but heavily distorted signal, and injecting the AF signal into pin 1 of the block gave me a loud click but no signal.

So I'm thinking maybe my issue is inside my 2nd IF transformer, but I'm still seeking input before I do a swap. I have a spare if necessary.