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: 4 Guest(s)
[-]
Recent Posts
Philco model 60
>>and found that the field coil is bad. Should be 1140 ohms, tests at 1.1k ohms. You have one stringent crit...morzh — 02:07 PM
Philco model 60
Yes I was there. I got some real bargains there. Plus a Zenith 7G605 clipper that I have been trying to find for a fair ...Radios1340 — 01:46 PM
The speaker table error?
G  10-1/2"       65, 76, 87, 95 Push-Pull 45's 2766 0.7 550 3200 H   10-1/2"    77, 96 Push-Pull...morzh — 09:26 PM
A Marconi model 86
I have a Stromberg, one of the early ones, seems early 30s. This is what I call a back breaker. None of the early Philc...morzh — 08:28 PM
A Marconi model 86
A backbreaker.....PaulPaul Philco322 — 08:12 PM
A Marconi model 86
>>What a behemoth! A Juggernaut.morzh — 07:47 PM
Philco 70 antenna lead
I am not sure I understood about the coils and the mush. I looked an more than one coil in 20, 70, 90, 60, Zeniths and ...morzh — 07:46 PM
A Marconi model 86
:e_biggrin: What a behemoth!  I hope the final result is as much a quality sounding example!  Keep us posted on your pro...GarySP — 07:32 PM
A Marconi model 86
I should add that the double conversion may only be used on the shortwave bands, but I haven't looked at the schematic t...Arran — 07:27 PM
Philco 70 antenna lead
Yes, that wire will not pick up much interference as routed - the RF at that level won't be affected, and if you have st...radio1 — 07:26 PM

[-]
Who's Online
There are currently 6918 online users. [Complete List]
» 1 Member(s) | 6917 Guest(s)
Avatar

>