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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 T64  Philco 20B
Philco 41-250.    Philco49-500
GE 201.             Philco 39-25
Motorola 61X13. Philco 46-420     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



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