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
B&K 1077B no video
Hello Tim, I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ? Sincerely Richardradiorich — 01:55 AM
B&K 1077B no video
I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM
RCA 15X
I'd try replacing the bulb first and if that doesn't do it, then change the 35Z5 and see if the problem goes away.NostalgiaRadioTime — 12:28 AM
B&K 1077B no video
Hello Tim, I have that exact unit in my shop too plus a Sencore unit there are times I like one or other !!. Sincerely...radiorich — 11:07 PM
RCA 15X
Everthing goes at once, maybe it's the cold weather, I have had 2 dial strings break and no my little RCA is having dial...Paul Philco322 — 10:26 PM
Philco 91 Schematic
Hi Dan, I can't explain this specific resistor but I have seen the use of a switch to apply B+ voltage to screen gri...RodB — 09:36 PM
6TPZ and 5TPO Radio Help
I suspect it's been repaired before. And I suspect whoever repaired it, wanted to re-use old transistors' pin stubs in o...morzh — 09:24 PM
B&K 1077B no video
Thanks Rich! I'll take a look and see what he has. I know there's more modern equipment to be had, but this one I know a...TV MAN — 09:11 PM
B&K 1077B no video
Hello Tim, Here is a link to restoration of one on Phil's old radios site ! Sincerely Richard bk1077bradiorich — 09:01 PM
6TPZ and 5TPO Radio Help
I'm a little befuddled on this one. Should X5 and X4 be tied together like this?  It looks like someone added this at so...R3Sons — 07:33 PM

[-]
Who's Online
There are currently no members online.

>