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Philco 16B Restoration
prado.au
Junior Member
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Posts: 4
Threads: 1
Joined: Nov 2013
City: Australia
#1

11-01-2013, 06:14 PM
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
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Messages In This Thread
Philco 16B Restoration - by prado.au - 11-01-2013, 06:14 PM
RE: Philco 16B Restoration - by Arran - 11-01-2013, 10:17 PM
RE: Philco 16B Restoration - by prado.au - 11-05-2013, 03:30 AM
RE: Philco 16B Restoration - by prado.au - 11-05-2013, 03:51 AM
RE: Philco 16B Restoration - by prado.au - 11-17-2013, 05:11 PM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration