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 70 output transformer
#22

Received the wire and rebuilt the oscillator coil using plastic blister pack, had it looking good, put back in - nothing, nada, nothing. Well thought it might be the plastic, so to it out and used scotch tape to rewind the RF coupling,  back in, still, nada, nothing. Took it out and did some research and ran across moisture. Baked it twice at 150 degrees 10 minutes each. Put it back in and heard the faint, tweaked, and it is back. Would not have believed it, but good advice as I had washed the former with water to get the grunge off thinking the wax would hold up, so coils don't like it. Doing the first RF coil next , DC leakage is no fun.

Oscillator tapped secondary and feedback done by hand with 30 AWG --


Attached Files Image(s)
   


Messages In This Thread
Philco 70 output transformer - by radio1 - 05-06-2020, 07:49 PM
RE: Philco 70 output transformer - by Radioroslyn - 05-06-2020, 08:32 PM
RE: Philco 70 output transformer - by radio1 - 05-06-2020, 08:40 PM
RE: Philco 70 output transformer - by klondike98 - 05-06-2020, 10:45 PM
RE: Philco 70 output transformer - by rfeenstra - 05-06-2020, 11:31 PM
RE: Philco 70 output transformer - by klondike98 - 05-06-2020, 11:56 PM
RE: Philco 70 output transformer - by radio1 - 05-07-2020, 05:45 AM
RE: Philco 70 output transformer - by Steve Davis - 05-07-2020, 08:58 AM
RE: Philco 70 output transformer - by radio1 - 05-07-2020, 09:59 AM
RE: Philco 70 output transformer - by radio1 - 05-07-2020, 11:20 AM
RE: Philco 70 output transformer - by morzh - 05-07-2020, 11:40 AM
RE: Philco 70 output transformer - by rfeenstra - 05-07-2020, 12:01 PM
RE: Philco 70 output transformer - by radio1 - 05-07-2020, 12:21 PM
RE: Philco 70 output transformer - by morzh - 05-07-2020, 12:46 PM
RE: Philco 70 output transformer - by rfeenstra - 05-07-2020, 12:56 PM
RE: Philco 70 output transformer - by radio1 - 05-07-2020, 07:34 PM
RE: Philco 70 output transformer - by morzh - 05-07-2020, 08:46 PM
RE: Philco 70 output transformer - by radio1 - 05-08-2020, 04:17 PM
RE: Philco 70 output transformer - by morzh - 05-08-2020, 04:51 PM
RE: Philco 70 output transformer - by radio1 - 05-18-2020, 06:52 PM
RE: Philco 70 output transformer - by radio1 - 05-19-2020, 08:26 PM
RE: Philco 70 output transformer - by radio1 - 05-27-2020, 08:19 PM
RE: Philco 70 output transformer - by radio1 - 06-06-2020, 08:22 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
New member
Hi. I specialize in refurbishing Predictas, but I'm in Chicago. If you can get it to me, I'd be happy to go over it. ...Bob Andersen — 06:43 PM
An attempt to remove the Field Coil from a G speaker
I have 3 G speaker, all with open Field coils. Today I pull one of the shelf and decided to try to remove the FC (spo...morzh — 06:07 PM
Philco 91 Restore Code ??
Thanks Mike. I will check them out.dconant — 05:52 PM
Philco 91 Restore Code ??
There is no such thing as bad Fluke. This said, they are expensive. A Fluke is easily 10x the price of comparable CCC...morzh — 05:45 PM
Philco 91 Restore Code ??
Hello Mike, Yes, I have 3 Fluke meters one being my first Fluke 77 and other being Fluke 87. My third is Fluke clamp -...radiorich — 05:04 PM
Philco 91 Restore Code ??
I knew that Fluke was the Cadillac so with that in mind what Fluke would you recommend I get?dconant — 03:53 PM
Philco 91 Restore Code ??
Yep. 10W is probably enough. Also, if the meter measures Farads, then it should also have that "Delta" button...morzh — 02:38 PM
Philco 91 Restore Code ??
I measured the current through the resistor I am using as a replacement for the speaker field coil and got 40ma. So that...dconant — 02:32 PM
Philco 91 Restore Code ??
No I'm not saying I don't own a DMM. I have a CCC one (Thsinde 18+). I forgot that could read caps. I did purchase a Flu...dconant — 02:28 PM
Philco 91 Restore Code ??
Are you telling me you do not own any decent DMM, that can measure capacitances from a few pF and up? Even todays CCC (C...morzh — 01:44 PM

[-]
Who's Online
There are currently 3465 online users. [Complete List]
» 1 Member(s) | 3464 Guest(s)
Avatar

>