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

Thread Closed

Philco 71 restoration
#29

Makes sence..

I injected a 260kc tone into the grid cap of th 36 and I could hear it on my tracer and through the speaker. When I touched the cathode of the 36 tube the tone was pretty quiet, but when I put the probe on the plate it was louder.

I did take the OSC coil out and I noticed that the secondary of the outside coil is reading high.

According to riders the coil should read:

Primary Inner coil 5.2ohms
Primary outter coil 5.2ohms
Secondary of outter coil 15.7ohms

My coil reads:
Primary Inner coil 5.3ohms
Primary outter coil 5.4ohms
Secondary of outter coil 4.5Kohms

So judging from that guess its time to try my hand at rewinding the secondary (feedback) of the coil. The windings are discolored compared to the primary.

[Image: http://i1129.photobucket.com/albums/m501...0743-1.jpg]

[Image: http://i1129.photobucket.com/albums/m501...0744-1.jpg]

-Keith


Messages In This Thread
Philco 71 restoration - by Keith - 09-29-2011, 12:48 AM
RE: Philco 71 restoration - by Keith - 03-02-2012, 06:09 PM
Re: Man this thing is a nightmare - by Keith - 09-29-2011, 01:36 AM
Re: Man this thing is a nightmare - by Keith - 09-29-2011, 10:14 PM
Re: Man this thing is a nightmare - by Keith - 10-06-2011, 12:29 AM
Re: Man this thing is a nightmare - by Arran - 10-06-2011, 02:24 AM
Re: Man this thing is a nightmare - by rghines1 - 10-06-2011, 10:20 AM
Re: Man this thing is a nightmare - by exray - 10-06-2011, 12:41 PM
Re: Man this thing is a nightmare - by Keith - 10-08-2011, 10:34 PM
Re: Man this thing is a nightmare - by Marsupial - 10-08-2011, 11:52 PM
Re: Man this thing is a nightmare - by exray - 10-09-2011, 05:56 AM
Re: Man this thing is a nightmare - by Keith - 10-10-2011, 01:40 PM
Re: Philco 71 restoration - by Keith - 10-31-2011, 05:10 PM
Re: Philco 71 restoration - by 7estatdef - 10-31-2011, 08:48 PM
Re: Philco 71 restoration - by 7estatdef - 10-31-2011, 09:00 PM
Re: Philco 71 restoration - by Keith - 11-01-2011, 01:03 AM
Re: Philco 71 restoration - by Keith - 11-01-2011, 01:06 AM
Re: Philco 71 restoration - by 7estatdef - 11-01-2011, 10:58 PM
Re: Philco 71 restoration - by Keith - 11-03-2011, 01:03 AM
Re: Philco 71 restoration - by 7estatdef - 11-03-2011, 02:59 AM
Re: Philco 71 restoration - by codefox1 - 11-03-2011, 10:04 AM
Re: Philco 71 restoration - by Keith - 11-03-2011, 06:00 PM
Re: Philco 71 restoration - by 7estatdef - 11-03-2011, 06:26 PM
Re: Philco 71 restoration - by Keith - 11-03-2011, 06:31 PM
Re: Philco 71 restoration - by 7estatdef - 11-03-2011, 06:42 PM
Re: Philco 71 restoration - by Keith - 11-03-2011, 07:40 PM
Re: Philco 71 restoration - by 7estatdef - 11-03-2011, 08:39 PM
Re: Philco 71 restoration - by Keith - 11-03-2011, 09:38 PM
Re: Philco 71 restoration - by Keith - 11-04-2011, 12:29 AM
Re: Philco 71 restoration - by Keith - 11-04-2011, 02:33 PM
Re: Philco 71 restoration - by Keith - 11-30-2011, 11:56 PM
Re: Philco 71 restoration - by TA Forbes - 12-01-2011, 12:37 AM
Re: Philco 71 restoration - by TA Forbes - 12-02-2011, 09:54 PM
Re: Philco 71 restoration - by codefox1 - 12-03-2011, 11:48 AM
Re: Philco 71 restoration - by Keith - 12-04-2011, 03:03 PM
Re: Philco 71 restoration - by Keith - 12-23-2011, 04:36 AM



Users browsing this thread: 2 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.

>