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

A Zenith 8G005YT restore
#36

I'd crank up the variac a bit till I got close to 10v on the filament string (at the 200mfd cap). I trust the audio stages are working ok? If so then try injecting a 455kc signal though a small cap (200mmfd-.01mfd not critical) at pin 2 of the 1LN5 if ok then pin 6 if ok when pin 2 of the 1LC6 then pin 6. With the generator on pin 6 you can align the IF transformers.

Do your self a favor and only use the digital meter for ohms measures.Get a VOM or if you are going to be measuring hi impedance circuits a VTVM. Digital meters can't deal well with any sort of voltage with signal on them.I think what happens is some of the semiconductors act as diodes and rectify the signal portion of the voltage and it comes up with a goofy reading. There ok if it's just voltage  like right out of the power supply or cathode and screen grid circuit but plate and control grid circuits I don't trust them. Once I was working on the TV set, measured some voltages and they where no where near what they should be. Was thinking this set is all kinda screwed up. The next few days I was scratching my head tiring to unlock this puzzle. Left my Beckman 310 meter somewhere so I grab the Simpson 610 ('50s analog meter)and the reading were much closer to what they should be.

GL
Terry


Messages In This Thread
A Zenith 8G005YT restore - by klondike98 - 05-29-2016, 10:07 PM
RE: A Zenith 8G005YT restore - by morzh - 05-29-2016, 10:23 PM
RE: A Zenith 8G005YT restore - by Eliot Ness - 05-30-2016, 07:07 AM
RE: A Zenith 8G005YT restore - by klondike98 - 05-30-2016, 07:53 AM
RE: A Zenith 8G005YT restore - by Jayce - 05-31-2016, 10:24 PM
RE: A Zenith 8G005YT restore - by OldRestorer - 06-01-2016, 11:33 AM
RE: A Zenith 8G005YT restore - by Joe Rossi - 06-01-2016, 07:41 PM
RE: A Zenith 8G005YT restore - by klondike98 - 06-01-2016, 07:57 PM
RE: A Zenith 8G005YT restore - by klondike98 - 06-02-2016, 12:20 PM
RE: A Zenith 8G005YT restore - by klondike98 - 06-02-2016, 06:43 PM
RE: A Zenith 8G005YT restore - by sam - 06-02-2016, 07:34 PM
RE: A Zenith 8G005YT restore - by OldRestorer - 06-03-2016, 07:55 AM
RE: A Zenith 8G005YT restore - by Paul Philco322 - 06-04-2016, 01:53 PM
RE: A Zenith 8G005YT restore - by klondike98 - 06-04-2016, 02:13 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 06-04-2016, 02:33 PM
RE: A Zenith 8G005YT restore - by klondike98 - 06-05-2016, 08:55 PM
RE: A Zenith 8G005YT restore - by morzh - 06-06-2016, 08:36 PM
RE: A Zenith 8G005YT restore - by klondike98 - 06-06-2016, 08:54 PM
RE: A Zenith 8G005YT restore - by sam - 06-06-2016, 10:15 PM
RE: A Zenith 8G005YT restore - by morzh - 06-06-2016, 10:21 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 06-07-2016, 08:01 AM
RE: A Zenith 8G005YT restore - by klondike98 - 06-07-2016, 09:25 AM
RE: A Zenith 8G005YT restore - by morzh - 06-07-2016, 12:01 PM
RE: A Zenith 8G005YT restore - by klondike98 - 06-12-2016, 10:38 AM
RE: A Zenith 8G005YT restore - by sam - 06-12-2016, 04:15 PM
RE: A Zenith 8G005YT restore - by klondike98 - 06-16-2016, 10:27 AM
RE: A Zenith 8G005YT restore - by morzh - 06-16-2016, 11:00 AM
RE: A Zenith 8G005YT restore - by klondike98 - 06-19-2016, 10:04 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 06-20-2016, 07:58 AM
RE: A Zenith 8G005YT restore - by klondike98 - 06-20-2016, 09:09 AM
RE: A Zenith 8G005YT restore - by klondike98 - 06-21-2016, 05:10 PM
RE: A Zenith 8G005YT restore - by klondike98 - 06-23-2016, 03:20 PM
RE: A Zenith 8G005YT restore - by klondike98 - 06-28-2016, 05:15 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 07-06-2016, 09:14 AM
RE: A Zenith 8G005YT restore - by klondike98 - 07-06-2016, 10:50 AM
RE: A Zenith 8G005YT restore - by klondike98 - 07-07-2016, 10:43 AM
RE: A Zenith 8G005YT restore - by Radioroslyn - 07-07-2016, 02:23 PM
RE: A Zenith 8G005YT restore - by klondike98 - 07-07-2016, 07:26 PM
RE: A Zenith 8G005YT restore - by klondike98 - 07-14-2016, 12:02 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 07-14-2016, 01:44 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 07-14-2016, 02:00 PM
RE: A Zenith 8G005YT restore - by klondike98 - 07-14-2016, 02:12 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 07-14-2016, 02:33 PM
RE: A Zenith 8G005YT restore - by klondike98 - 07-14-2016, 04:58 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 07-14-2016, 05:49 PM
RE: A Zenith 8G005YT restore - by klondike98 - 07-14-2016, 08:59 PM
RE: A Zenith 8G005YT restore - by klondike98 - 07-16-2016, 09:46 AM
RE: A Zenith 8G005YT restore - by klondike98 - 07-16-2016, 01:02 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 07-16-2016, 03:40 PM
RE: A Zenith 8G005YT restore - by klondike98 - 07-17-2016, 09:11 AM
RE: A Zenith 8G005YT restore - by Radioroslyn - 07-17-2016, 10:03 AM
RE: A Zenith 8G005YT restore - by klondike98 - 07-17-2016, 10:33 AM
RE: A Zenith 8G005YT restore - by Radioroslyn - 07-17-2016, 10:36 AM
RE: A Zenith 8G005YT restore - by klondike98 - 07-17-2016, 10:37 AM
RE: A Zenith 8G005YT restore - by Radioroslyn - 07-17-2016, 11:06 AM
RE: A Zenith 8G005YT restore - by klondike98 - 07-17-2016, 11:49 AM
RE: A Zenith 8G005YT restore - by Phlogiston - 07-17-2016, 03:06 PM
RE: A Zenith 8G005YT restore - by klondike98 - 07-17-2016, 03:49 PM
RE: A Zenith 8G005YT restore - by klondike98 - 07-20-2016, 06:38 PM
RE: A Zenith 8G005YT restore - by Phlogiston - 07-20-2016, 08:29 PM
RE: A Zenith 8G005YT restore - by klondike98 - 08-30-2016, 04:13 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 08-30-2016, 08:28 PM
RE: A Zenith 8G005YT restore - by klondike98 - 08-30-2016, 09:03 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 08-30-2016, 11:07 PM
RE: A Zenith 8G005YT restore - by klondike98 - 08-31-2016, 08:51 AM
RE: A Zenith 8G005YT restore - by klondike98 - 09-10-2016, 04:39 PM
RE: A Zenith 8G005YT restore - by klondike98 - 09-22-2016, 03:04 PM
RE: A Zenith 8G005YT restore - by sam - 09-22-2016, 07:12 PM
RE: A Zenith 8G005YT restore - by Eliot Ness - 09-26-2016, 04:28 PM
RE: A Zenith 8G005YT restore - by Paul Philco322 - 10-10-2016, 03:26 PM
RE: A Zenith 8G005YT restore - by klondike98 - 10-10-2016, 05:15 PM
RE: A Zenith 8G005YT restore - by Radioroslyn - 10-10-2016, 07:42 PM
RE: A Zenith 8G005YT restore - by KCMike - 10-10-2016, 07:50 PM
RE: A Zenith 8G005YT restore - by klondike98 - 10-10-2016, 08:55 PM
RE: A Zenith 8G005YT restore - by klondike98 - 11-04-2018, 08:18 AM
RE: A Zenith 8G005YT restore - by morzh - 11-04-2018, 12:21 PM
RE: A Zenith 8G005YT restore - by klondike98 - 11-04-2018, 01:00 PM
RE: A Zenith 8G005YT restore - by morzh - 11-04-2018, 01:37 PM
RE: A Zenith 8G005YT restore - by MrFixr55 - 04-04-2023, 08:19 AM
RE: A Zenith 8G005YT restore - by morzh - 04-04-2023, 09:42 AM
RE: A Zenith 8G005YT restore - by MrFixr55 - 04-05-2023, 08:11 AM
RE: A Zenith 8G005YT restore - by radiorich - 04-06-2023, 12:36 AM
RE: A Zenith 8G005YT restore - by morzh - 04-06-2023, 12:57 PM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
Philco 610B oscillator wiring
Some info from Beitmans says late production. David   David — 06:06 PM
Restoring Philco 96
Oh wow! Just found this thread.  Brings me back to early days on this phorum.  I did a 96 back in 2017.  Thread here: ...rfeenstra — 06:05 PM
Philco 610B oscillator wiring
Thanks for the replies. It's not the really the hum that I am after. Just trying to understand why only the shortwave ba...Tubester — 04:01 PM
Restoring Philco 96
70 and 90 are Superhets, but at least the 2x45 model of 90 uses the Plate detector (and so does 70). Also the Atwaters,...morzh — 03:28 PM
Restoring Philco 96
Morzh, Prayers for your mom. I am sure that there was enough pain living through the Holocaust as a child. I pray dail...MrFixr55 — 02:19 PM
Philco 610B oscillator wiring
Hi Dan, Divide and conquer. First off trry to differentiate between 60Hz and 120 Hz hum. 120 Hz hum has a higher pit...MrFixr55 — 01:49 PM
Restoring Philco 96
Yes, other than takin a toll on your back, they are undeed way more repair friendly than many other Philcos. To me, som...morzh — 01:04 PM
Philco 610B oscillator wiring
If the wires look like they were this way from the factory (very neat and very dull soldering joints), I'd leave them be...morzh — 12:58 PM
My Philco 37-116 Restore
I managed to open up the Expander Unit and replace the grid cap wires. Tested the connections found they looked good and...dconant — 12:19 PM
610B Oscillator Questions
I've included a picture of the 'actual' schematic I created. I double checked several times and it appears to be accur...Tubester — 09:26 AM

[-]
Who's Online
There are currently 2333 online users. [Complete List]
» 2 Member(s) | 2331 Guest(s)
AvatarAvatar

>