80 Jr Troubleshooting- B+ measurements

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

80 Jr Troubleshooting- B+ measurements

klondike98
Phorum Moderator

Posts: 5,085
Threads: 270
Joined: Nov 2012
City: Wilsonville State, Province, Country: OR

07-08-2013, 04:37 PM

OK I pulled the oscillator coil out to look at it and check continuity. It looks good in that there isn't any green crud/corrosion that I've seen in some pictures. The measured values are in yellow on schematic photo. One value is off - 18 ohms (spec is 2.8 ) but its certainly not open, not sure what's going on with it...thoughts? The resistor incorporated into the coil assembly is about 11.4K (14% high) and the 710 pF cap is original...perhaps I should try replacing it/them?
[Image: https://www.dropbox.com/s/uyu76ycmt9ef7a....jpg?raw=1]

Cheers,
Bob
[Image: https://www.dropbox.com/s/5m63ib99yfx2eg....jpg?raw=1]
Bob's Restorations Web Page

Website Find

« Next Oldest | Next Newest »

Messages In This Thread

80 Jr Troubleshooting- B+ measurements - by klondike98 - 07-07-2013, 02:00 PM

RE: 80 Jr Troubleshooting advice - by Mondial - 07-07-2013, 02:43 PM

RE: 80 Jr Troubleshooting advice - by morzh - 07-07-2013, 03:31 PM

RE: 80 Jr Troubleshooting advice - by klondike98 - 07-07-2013, 06:35 PM

RE: 80 Jr Troubleshooting advice - by 7estatdef - 07-07-2013, 08:45 PM

RE: 80 Jr Troubleshooting advice - by klondike98 - 07-07-2013, 09:22 PM

RE: 80 Jr Troubleshooting advice - by klondike98 - 07-08-2013, 04:37 PM

RE: 80 Jr Troubleshooting advice - by 7estatdef - 07-08-2013, 06:29 PM

RE: 80 Jr Troubleshooting advice - by klondike98 - 07-10-2013, 08:48 AM

RE: 80 Jr Troubleshooting advice - by 7estatdef - 07-10-2013, 07:36 PM

RE: 80 Jr Troubleshooting advice - by klondike98 - 07-11-2013, 09:09 AM

RE: 80 Jr Troubleshooting-Solved! - by Mondial - 07-11-2013, 09:28 AM

RE: 80 Jr Troubleshooting-Solved! - by morzh - 07-11-2013, 11:14 AM

RE: 80 Jr Troubleshooting-Solved! - by klondike98 - 07-11-2013, 06:35 PM

RE: 80 Jr Troubleshooting-Solved! - by 7estatdef - 07-11-2013, 08:32 PM

RE: 80 Jr Troubleshooting-Solved! - by klondike98 - 07-12-2013, 02:33 PM

View a Printable Version

Users browsing this thread: 2 Guest(s)

Recent Posts
Philco 42-1008 conversion kit
I read about a kit to convert the variable speed changer in the Philco 42-1008 into a single speed unit. That would rem...alangard — 09:30 PM
HiFi (Chifi) tube amp build - but my own design.
Tim Well...a chassis is metal. Magnetic or not, it does not matter. A transformer has some hum to it. It is natural....morzh — 08:40 PM
Hickok AC51 tube tester
I thought the 83 tube was bad because it looked white but it tests strong. Blue gassy though. I checked the fuse, it was...martinj — 08:37 PM
Shadow Meter Bulb
Ross I am not sure what current limiting effect the incandescent provides. They are two different parts of the sch...morzh — 08:31 PM
12' Philco
Bob Thanks for that photo. I have been looking for it, and I cannot find anythinmg on the web. I forgot it was here...morzh — 08:29 PM
Shadow Meter Bulb
I think after all has been said, I will use the same bulb that is specified for the dial pilot light which is a #55. I ...georgetownjohn — 07:31 PM
12' Philco
There was also this Philco! klondike98 — 07:25 PM
HiFi (Chifi) tube amp build - but my own design.
I expected a challenge and this is just part of it. But, it's also supposed to be fun, entertaining, informative and enj...TV MAN — 07:12 PM
Shadow Meter Bulb
Butting in here with a question. Since the shadow meter is connected directly to the 1st and 2nd I.F.'s wouldn't the met...RossH — 06:43 PM
HiFi (Chifi) tube amp build - but my own design.
Mike, Tim; you are about to enter the twilight zone. Doo doo doo doo, doo doo doo doo This is something alright. I'm go...RodB — 06:26 PM

Who's Online
There are currently no members online.

Login
Username:
Password:	Lost Password?
	Remember me