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

Linear Mode
49-504
462ron
Phorum Expert
*****
Posts: 841
Threads: 50
Joined: Feb 2013
City: Shenandoah, State, Province, Country: Pennsylvania
#13

10-04-2024, 08:42 AM
Hi, I would monitor the voltage on the control grid of the 50A6 pin 6. On 2 occasions on different sets I would see the control grid slowly go more positive after awhile and the sound would get weak and slightly distorted even though I had recapped it. Turned out the tube had gas or some issue even though it tested good. Make sure you replaced the C200 coupling cap on your set.

Ron
Bendix 0626.      RCA 8BX5.   RCA T64
Philco 41-250.    Philco49-500
GE 201.             Philco 39-25
Motorola 61X13. Philco 46-42        Crosley 52TQ
Philco 37-116.    Philco 70
AK 35                Philco 46-350
Philco 620B.       Zenith Transoceanic B-600
Philco 60B.         Majestic 50
Philco 52-944.    AK 84
Find
« Next Oldest | Next Newest »


Messages In This Thread
49-504 - by philco4me - 09-27-2024, 01:47 PM
RE: 49-504 - by philco4me - 09-27-2024, 01:53 PM
RE: 49-504 - by Radioroslyn - 09-28-2024, 07:46 AM
RE: 49-504 - by philco4me - 09-28-2024, 10:36 AM
RE: 49-504 - by philco4me - 09-28-2024, 11:19 AM
RE: 49-504 - by RodB - 09-28-2024, 12:20 PM
RE: 49-504 - by philco4me - 09-28-2024, 01:05 PM
RE: 49-504 - by philco4me - 09-29-2024, 05:35 PM
RE: 49-504 - by Radioroslyn - 09-29-2024, 07:53 PM
RE: 49-504 - by philco4me - 09-29-2024, 08:13 PM
RE: 49-504 - by philco4me - 10-03-2024, 04:10 PM
RE: 49-504 - by MrFixr55 - 10-03-2024, 11:45 PM
462ron - by 462ron - 10-04-2024, 08:42 AM
RE: 49-504 - by philco4me - 10-04-2024, 09:20 AM
RE: 49-504 - by philco4me - 10-07-2024, 02:43 PM
RE: 49-504 - by RodB - 10-07-2024, 04:12 PM
RE: 49-504 - by Arran - 10-07-2024, 07:40 PM



Users browsing this thread: 2 Guest(s)
[-]
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.

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