[Phlogiston]

The only failures I've found inside the catacomb have been the interstage transformers. And you really have to dig into it to change those.

I have a couple of 26 "portables". Still trying to find either a complete horn or a horn driver for one of them. In the meantime, I have a 2" transistor radio speaker glued inside the original horn driver encasement, and an output transformer across the output. It sort of works, but I sure want to get it done right some day.

Also trying to find some appropriate material to replace the vibration dampers (lack thereof is keeping me from reassembling the radio and enjoying it). Any ideas?

I find their choice of IF frequency intriguing... 40 KHz. Lets me get strong stations pretty much anywhere on the dial I want.

I am not familiar or don't remember that chassis but if you are talking about the isolation bands like on a Radiola III or the early Federal radios (59, 58, 61 and such) then I use heavy rubber strips cut from flat material that I got somewhere(?) probably old Telco projects/waste. I think I used the last of what I had yesterday to mount the C supply (transformer supply removed from a wall-wart) inside of my new power supply project. I am going to have to see if I can find some more. It is a little less than 1/8 " thick, black rubber.

Radiola IIIA:

I also replated the structural components in this radio.

   

Closeup of anti-vibration/microphonics suspension.

   

Also (again) I would not try "digging" out anything in a catacomb or any other potted device , like an AK power supply. I use a oven, also outdoors and carefully monitor the temperature to de-pot these devices. The setup prevents unexpected movement (weight CHANGES as the tar/wax melts) and catches the tar for repotting. All of these devices are completely rewired.


An AK supply After/Before rebuilding. You know that the transformer can put 800+ volts on some of that crispy old wire. Every time somebody says "just dig out the caps" it make me cringe