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

Magnavox 70s console
#25

Q1 is an NPN transistor which I replaced with an ECG161, another NPN. Way back in the beginning, the voltages on Q1 were way off. It had collector to emitter leakage. After replacing it, the voltages are much closer to what they should be. After racking my brain, I tried 3 other transistors in its place , the voltages still good but not working. The ECG 161 is back in now.When I first got this radio, the previous guy had most of the components removed from the top of the board, why I don't know. He then remounted them on the foil side. So I unsoldered them, tested them and reinstalled them on the top side again. Makes me think he had a problem with the osc too. Practically all the solder connections have been redone during the process of remounting the parts. Haven't been able to track down any cracks in the foil. Earlier I isolated the tuning gang and tested it for shorts as well as using my cap tester on it to make sure it was changing capacitance in a smooth manner as I rotated the tuning knob. Where the pcb mounts to the metal frame is where there are some ground points that look fine. I will have a go at resoldering those points and hope for the best. I have spent a ton of time on this unit over the last month and just can't believe this is so illusive! Can't remember the last time a radio gave me this much grief!

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


Messages In This Thread
Magnavox 70s console - by 462ron - 12-23-2018, 01:20 PM
RE: Magnavox 70s console - by Radioroslyn - 12-23-2018, 01:35 PM
RE: Magnavox 70s console - by 462ron - 12-23-2018, 02:16 PM
RE: Magnavox 70s console - by Radioroslyn - 12-23-2018, 02:46 PM
RE: Magnavox 70s console - by 462ron - 12-23-2018, 03:32 PM
RE: Magnavox 70s console - by 462ron - 12-23-2018, 03:43 PM
RE: Magnavox 70s console - by Arran - 12-23-2018, 04:43 PM
RE: Magnavox 70s console - by 462ron - 12-23-2018, 05:26 PM
RE: Magnavox 70s console - by 462ron - 12-30-2018, 11:41 AM
RE: Magnavox 70s console - by rocketeer - 01-08-2019, 11:56 PM
RE: Magnavox 70s console - by 462ron - 01-09-2019, 12:52 AM
RE: Magnavox 70s console - by rocketeer - 01-09-2019, 05:19 PM
RE: Magnavox 70s console - by 462ron - 01-09-2019, 08:42 PM
RE: Magnavox 70s console - by rocketeer - 01-09-2019, 09:15 PM
RE: Magnavox 70s console - by 462ron - 01-10-2019, 01:39 AM
RE: Magnavox 70s console - by 462ron - 01-22-2019, 03:36 PM
RE: Magnavox 70s console - by morzh - 01-23-2019, 12:24 PM
RE: Magnavox 70s console - by 462ron - 01-23-2019, 02:58 PM
RE: Magnavox 70s console - by morzh - 01-23-2019, 07:18 PM
RE: Magnavox 70s console - by 462ron - 01-24-2019, 01:28 AM
RE: Magnavox 70s console - by morzh - 01-24-2019, 09:12 AM
RE: Magnavox 70s console - by 462ron - 01-24-2019, 09:26 AM
RE: Magnavox 70s console - by 462ron - 01-24-2019, 01:49 PM
RE: Magnavox 70s console - by morzh - 01-24-2019, 02:19 PM
RE: Magnavox 70s console - by 462ron - 01-24-2019, 03:47 PM
RE: Magnavox 70s console - by morzh - 01-24-2019, 04:35 PM
RE: Magnavox 70s console - by 462ron - 01-25-2019, 03:11 PM
RE: Magnavox 70s console - by morzh - 01-25-2019, 05:45 PM
RE: Magnavox 70s console - by 462ron - 01-26-2019, 01:40 AM
RE: Magnavox 70s console - by morzh - 01-26-2019, 07:37 PM
RE: Magnavox 70s console - by 462ron - 01-26-2019, 09:13 PM
RE: Magnavox 70s console - by morzh - 01-27-2019, 12:58 PM
RE: Magnavox 70s console - by 462ron - 01-27-2019, 02:51 PM
RE: Magnavox 70s console - by morzh - 01-27-2019, 03:27 PM
RE: Magnavox 70s console - by Arran - 01-28-2019, 03:56 AM
RE: Magnavox 70s console - by 462ron - 01-28-2019, 02:21 PM
RE: Magnavox 70s console - by morzh - 01-28-2019, 02:24 PM
RE: Magnavox 70s console - by 462ron - 01-28-2019, 02:31 PM
RE: Magnavox 70s console - by morzh - 01-28-2019, 02:34 PM
RE: Magnavox 70s console - by 462ron - 01-30-2019, 10:44 PM
RE: Magnavox 70s console - by morzh - 01-30-2019, 11:27 PM
RE: Magnavox 70s console - by 462ron - 01-30-2019, 11:54 PM
RE: Magnavox 70s console - by morzh - 01-31-2019, 12:08 AM
RE: Magnavox 70s console - by 462ron - 01-31-2019, 12:16 AM
RE: Magnavox 70s console - by Ron Ramirez - 01-31-2019, 07:57 AM
RE: Magnavox 70s console - by morzh - 01-31-2019, 10:12 AM
RE: Magnavox 70s console - by 462ron - 01-31-2019, 11:02 AM
RE: Magnavox 70s console - by morzh - 01-31-2019, 12:05 PM
RE: Magnavox 70s console - by 462ron - 02-01-2019, 12:19 AM
RE: Magnavox 70s console - by morzh - 02-01-2019, 11:02 AM
RE: Magnavox 70s console - by 462ron - 02-01-2019, 05:35 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Hi Paulo, Welcome to the Philco Phorum. I can see why you want to find good reproduction parts. That is a bea...MrFixr55 — 11:10 PM
HiFi (Chifi) tube amp build - but my own design.
Tim, I have some bakelite sockets in my work shop that I can dig up. I believe quite a few are NOS. I will take photo...RodB — 10:03 PM
Philco 610B oscillator wiring
> The cathode as noted is wired directly to the ground side of the heater filament for that tube, not to the #17 and ...Radioroslyn — 08:12 PM
HiFi (Chifi) tube amp build - but my own design.
Tim; I noticed your post a little late, but I would take one of the junk sockets and try to break a chunk out of it wi...Arran — 08:07 PM
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM

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

>