[prado.au]

Hi, a Philco shouldered 16B, code 125 tombstone landed on my workbench in need of restoration. I'm quite certain it is a Code 125 variant once I found a circuit etc. Tested and found all the tubes to be OK. There was a Type 37 fitted in the OSC socket so I replaced it with a spare 76 I had. The chassis is pretty much dead so I got the power supply up and running OK. Now for the fun bits.. There is no sign of any station signal on any band. I noticed that there is a wire coming from pin 3 of the RF 78 that is floating and not connected anywhere. I followed the circuit and all the 78 Grids are connected as indicated on the circuit. So I have a mystery wire. Connected a sig gen to the grid of the first DET and swept across the IF centre frequency and it appears to be peaking at around 440Khz... So the alignment may be a little off. BTW the OSC appears to be working..

I'm at a stage where I need to resolve the mystery wire issue. It would be appreciated if anyone has an under chassis photo of the wiring around the 78 RF section so I can compare with mine...

Also, is it a must to deal with the Philco Block Condensers?

In the mean time I will look for other issues.

Any help appreciated
Regards
Rob