1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration

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
42-350 good volume & recept with pushbuttons tuner so so
FXpert
Junior Member
**
Posts: 33
Threads: 8
Joined: Jan 2011
#1

08-03-2011, 10:31 PM
I'm restoring a 42-350 I've recapped and all tubes test strong except the two 7v7's. All tube voltages seem to be within specs. My problem is low volume. After rechecking my recaped connections to make sure I didn't make any mistakes I discovered I have plenty of volume in push button mode. I've tried cleaning the band switch with contact cleaner and tried to scrape the brass where I could to make better connection. It doesn't look corroded.
Is there a way I can eliminate the band switch as my problem? What other problems can be causing this? I feel I have tunnel vision now as I feel the band switch has to be the problem. Can it be the weaK 7v7 tubes? I have another 42-350 with a bad transformer, but guess what? Every tube but the 7V7's.

Thanks in advance.
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
42-350 good volume & recept with pushbuttons tuner so so - by FXpert - 08-03-2011, 10:31 PM



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 2119 online users. [Complete List]
» 4 Member(s) | 2115 Guest(s)
AvatarAvatarAvatarAvatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration