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

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

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 ipwizard - 09-29-2011, 12:48 AM
RE: Philco 71 restoration - by ipwizard - 03-02-2012, 06:09 PM
Re: Man this thing is a nightmare - by ipwizard - 09-29-2011, 01:36 AM
Re: Man this thing is a nightmare - by ipwizard - 09-29-2011, 10:14 PM
Re: Man this thing is a nightmare - by ipwizard - 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 ipwizard - 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 ipwizard - 10-10-2011, 01:40 PM
Re: Philco 71 restoration - by ipwizard - 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 ipwizard - 11-01-2011, 01:03 AM
Re: Philco 71 restoration - by ipwizard - 11-01-2011, 01:06 AM
Re: Philco 71 restoration - by 7estatdef - 11-01-2011, 10:58 PM
Re: Philco 71 restoration - by ipwizard - 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 ipwizard - 11-03-2011, 06:00 PM
Re: Philco 71 restoration - by 7estatdef - 11-03-2011, 06:26 PM
Re: Philco 71 restoration - by ipwizard - 11-03-2011, 06:31 PM
Re: Philco 71 restoration - by 7estatdef - 11-03-2011, 06:42 PM
Re: Philco 71 restoration - by ipwizard - 11-03-2011, 07:40 PM
Re: Philco 71 restoration - by 7estatdef - 11-03-2011, 08:39 PM
Re: Philco 71 restoration - by ipwizard - 11-03-2011, 09:38 PM
Re: Philco 71 restoration - by ipwizard - 11-04-2011, 12:29 AM
Re: Philco 71 restoration - by ipwizard - 11-04-2011, 02:33 PM
Re: Philco 71 restoration - by ipwizard - 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 ipwizard - 12-04-2011, 03:03 PM
Re: Philco 71 restoration - by ipwizard - 12-23-2011, 04:36 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 46-480 Electronic Restoration
OOPS!! if there is a "flag" running up the side of the tube that touches the shield, then yes, a shield belon...MrFixr55 — 10:03 AM
Philco 46-480 Electronic Restoration
Thanks for pointing out that shield! I will try to find out where else it may belong. I simply installed it back where i...jrblasde — 10:02 AM
Philco 46-480 Electronic Restoration
Very nice job. A real contrast between how easy the main chassis is to work on, vs how tightly the RF chassis is packed...MrFixr55 — 09:31 AM
Philco 46-480 Electronic Restoration
After sleeping on it, I believe the issue is that I may have forgotten to install a ground connection between the RF cha...jrblasde — 09:21 AM
Refinishing Ideas
Hi Poulsbobl, I think that you could get away with it.  In the Philco Library, there is a parts listand specs for sp...MrFixr55 — 11:54 PM
Philco 46-480 Electronic Restoration
The sleeving for the transformer arrived early, so I went ahead and finished reassembling. The chassis looks far better ...jrblasde — 10:15 PM
Philco 610B oscillator wiring
I don't know what you are referring to when you say "tube cathode ground". Ground is a connection to the chass...RodB — 05:56 PM
Zenith H725
Good points, Arran. I haven't encountered this problem with any other radio (all earlier vintages), so am learning here....EdHolland — 05:32 PM
Zenith H725
Ed; One thing that I will say about these is that Brand Z was considerate enough to make these mica caps easily acces...Arran — 02:34 PM
Philco 610B oscillator wiring
Do you know what run # your chassis is? It took me a while to find what you were basing updates/modification on as I did...Radioroslyn — 07:34 AM

[-]
Who's Online
There are currently 702 online users. [Complete List]
» 3 Member(s) | 699 Guest(s)
AvatarAvatarAvatar

>