Zenith 10S464 issue

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

Linear Mode

Zenith 10S464 issue

murf
Senior Member

Posts: 673
Threads: 148
Joined: Jun 2011
City: Elko,MN.

08-28-2022, 02:28 PM

Hello fella's
Have an issue with a Zenith 10S464 that I just re-capped etc.
When powered up it plays excellent with sound quality and volume.
After about 15 minutes the volume will drop to about half of what it was when first powered up.
If I turn the volume up a little it reacts as it should.
Then after a while the volume will go up again for a while and then go lower again for a while.
Have checked the tubes and they are all in the acceptable range.
Seems to me like a tube issue.
Out of spec resistors were also replaced as well.
I did order a couple 6V6 tubes.
Could it possibly be an issue with the 6A8 or 6J5 tubes that test ok?
Any suggestions would be appreciated.
Thanks,
murf

Find

« Next Oldest | Next Newest »

Thread Closed

Messages In This Thread

Zenith 10S464 issue - by murf - 08-28-2022, 02:28 PM

RE: Zenith 10S464 issue - by RodB - 08-28-2022, 03:35 PM

RE: Zenith 10S464 issue - by murf - 08-28-2022, 03:44 PM

RE: Zenith 10S464 issue - by MrFixr55 - 08-28-2022, 06:54 PM

RE: Zenith 10S464 issue - by murf - 08-28-2022, 07:04 PM

RE: Zenith 10S464 issue - by murf - 08-30-2022, 01:09 PM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
Philco 42-345 Restoration/Repair
Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM
Philco 42-345 Restoration/Repair
Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM
Philco model 38 code 121 not receiving signal.
Well why not! :lol:Stormlord5500 — 03:14 PM
Philco model 38 code 121 not receiving signal.
Good luck next thing you know you will be winding coils just for the fun of it. DavidDavid — 11:29 AM
Testing a speaker and output transformer Trutone A2-G
morzh Short-circuited turns can be considered as a half-dead transformer. But on this case transformer will hot and s...Vlad95 — 11:01 AM
Testing a speaker and output transformer Trutone A2-G
I am not sure how a transformer could be weak. It could be inadequate, but only when you replace the original with somet...morzh — 09:56 AM

Who's Online

There are currently 2264 online users. [Complete List]
» 2 Member(s) | 2262 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me