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

Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Threaded Mode
Is this a xformer quick fix?
DKinYORKpa
Member
***
Posts: 193
Threads: 50
Joined: Oct 2011
City: York PA
#1

02-13-2012, 07:01 PM
I have 2 working Philco 70s on my bench. The one has a later looking repair on the first detector transformer (part #6). There's a 150K resistor across the primary and a .02 cap across the primary and secondary. Was this a quick fix for a bad transformer?
Find
Radioroslyn
Phorum Expert
*****
Posts: 7,323
Threads: 270
Joined: Dec 2009
City: Roslyn Pa
#2

02-13-2012, 11:02 PM
Sounds like it. Measure the resistance of the coil.
Terry
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!

Terry
Find
DKinYORKpa
Member
***
Posts: 193
Threads: 50
Joined: Oct 2011
City: York PA
#3

02-14-2012, 08:49 AM
You mean disconnect one side of that 150K resistor and measure the primary, right? It measures 14 ohms on the other 70. Let's say it is indeed open, what then?
Find
DKinYORKpa
Member
***
Posts: 193
Threads: 50
Joined: Oct 2011
City: York PA
#4

02-14-2012, 09:05 PM
It's open. I sent Ron a coil rewind request.
Find
« Next Oldest | Next Newest »
Thread Closed




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM
Preliminary work on wife's Silvertone 2014
Hello roy, that great news glad it worked out for you !! Sincerely Richardradiorich — 10:50 PM
Preliminary work on wife's Silvertone 2014
Safety caps arrived today.  Soldered one in and had a successful first power-up.  No magic smoke escaped and it tunes in...glyphmon — 09:53 PM

[-]
Who's Online
There are currently no members online.

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