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 46-200 Code 121 drifts....
#1

Hi,
Trying to help a friend with this radio. I looked up what should be the schematic and tube location but that one shows a couple of 14 volt tubes where mine use all 7 volt except for the rectifier and output.
Anyway the radio works great with the exception of the fact that it tends to drift slowly off station after playing for some
time.. maybe an hour or more roughly speaking. If you correct it several times and then turn it off it, of course, will come
on next time considerably or entirely off station.
What usualy is the cause? Is it the converter tube itself (which number) or likely to be one or more capacitors?... and which might be most likely?
Thanks very much... I haven't been on here for many months and then was a newbie ... really sorta still am. Hope to return
sometime and work further on that project I started many months ago but first the radio at hand, ha.
BTW.. Happy Thanksgiving to all :-)
#2

Hi

While C403 might be suspect...to be honest, what you describe sounds like normal operation to me. In my experience, many vintage radios tend to drift slightly after they have warmed up for awhile.

Oh, and Model 46-200 Code 121 uses the following tubes: 7A8, 7B7, 7C6, 50L6GT, 35Z5GT. Code 125 sets change the 7B7 to a 14A7, the 7C6 to a 14B6, and the 35Z5GT to a 35Y4.

--
Ron Ramirez
Ferdinand IN




Users browsing this thread:
[-]
Recent Posts
Another amp build - here I go again!
Well, never enough yet how much is too much? I ordered some spare parts from a couple vendors in China and now have ship...TV MAN — 10:49 AM
A Marconi model 86
This Marconi was a bit of a challenge. It was totally missing one electrolytic  capacitor, and the photos show a couple ...Dan Walker — 10:48 AM
Philco 42-345 Restoration/Repair
With regard to the speaker, unless the cone is so brittle that it crumbles as soon as you touch it I would try to repair...Arran — 04:07 AM
Philco 42-345 Restoration/Repair
That silver can capacitor is an aluminum electrolytic. You should replace it with an aluminum electrolytic with the valu...RodB — 11:46 PM
Philco 42-345 Restoration/Repair
Thank you Rodb and Gary for helping with clarification on these capacitors. Other than the Tiny 630volt one I'm not sure...osanders0311 — 10:17 PM
1949 Motorola 5A9M
Hello All; I found the CMB41L down in the basement, it is definitely a 1950-51 model, the capacitors have date codes ...Arran — 07:48 PM
Philco 42-345 Restoration/Repair
Hi, all the caps I order, other than the electrolytics, are of the 630V rating. No worries on it being too high, and no ...gary rabbitt — 05:46 PM
Philco 42-345 Restoration/Repair
Hi, there's a lot to consider when designing these circuits so you shouldn't have a lot of concern when replacing caps. ...RodB — 02:03 PM
Philco 42-345 Restoration/Repair
I have ordered and received new caps for this radio and hope I've ordered the correct ones. I tried matching them to the...osanders0311 — 11:35 AM
Philco newbie with P-1891-WA console questions
Hello Jeff , Far as the Electrolytic capacitors go here is a list of parts. that will work . I like using Nichicon and...radiorich — 09:50 PM

[-]
Who's Online
There are currently 1220 online users. [Complete List]
» 1 Member(s) | 1219 Guest(s)
Avatar

>