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610 help
#26

Try measuring the voltage on pins 4 and 5 of the 6A7. Pin 4 is the oscillator  plate where you should have around 150V. Pin 5 is the oscillator grid and there is a negative voltage there of a few volts if the tube is oscillating. Connect a 100K resistor in series with your DVM probe to measure voltages on these pins to prevent loading of the circuit at RF frequencies.


As Terry mentioned, the coils seem to measure ok, so the problem may be elsewhere.


Messages In This Thread
610 help - by keith49vj3 - 03-07-2015, 11:54 AM
RE: 610 help - by morzh - 03-07-2015, 12:17 PM
RE: 610 help - by keith49vj3 - 03-07-2015, 12:26 PM
RE: 610 help - by morzh - 03-07-2015, 12:34 PM
RE: 610 help - by Ron Ramirez - 03-07-2015, 12:39 PM
RE: 610 help - by keith49vj3 - 03-08-2015, 05:48 PM
RE: 610 help - by Ron Ramirez - 03-08-2015, 06:36 PM
RE: 610 help - by keith49vj3 - 03-08-2015, 07:45 PM
RE: 610 help - by morzh - 03-08-2015, 07:54 PM
RE: 610 help - by keith49vj3 - 03-08-2015, 08:44 PM
RE: 610 help - by morzh - 03-08-2015, 08:59 PM
RE: 610 help - by keith49vj3 - 03-09-2015, 06:08 AM
RE: 610 help - by morzh - 03-09-2015, 09:28 AM
RE: 610 help - by klondike98 - 03-09-2015, 09:52 AM
RE: 610 help - by Eliot Ness - 03-10-2015, 08:18 AM
RE: 610 help - by Mondial - 03-10-2015, 09:37 AM
RE: 610 help - by keith49vj3 - 03-12-2015, 06:31 AM
RE: 610 help - by morzh - 03-12-2015, 08:11 AM
RE: 610 help - by keith49vj3 - 03-13-2015, 06:26 AM
RE: 610 help - by Mondial - 03-13-2015, 07:41 AM
RE: 610 help - by keith49vj3 - 03-13-2015, 10:15 PM
RE: 610 help - by Mondial - 03-14-2015, 08:01 AM
RE: 610 help - by keith49vj3 - 03-14-2015, 03:05 PM
RE: 610 help - by Radioroslyn - 03-14-2015, 04:52 PM
RE: 610 help - by keith49vj3 - 03-14-2015, 06:09 PM
RE: 610 help - by Mondial - 03-14-2015, 06:21 PM
RE: 610 help - by morzh - 03-14-2015, 06:34 PM
RE: 610 help - by keith49vj3 - 03-14-2015, 07:09 PM
RE: 610 help - by Mondial - 03-14-2015, 07:23 PM
RE: 610 help - by Radioroslyn - 03-14-2015, 07:25 PM
RE: 610 help - by keith49vj3 - 03-14-2015, 07:59 PM
RE: 610 help - by Radioroslyn - 03-14-2015, 08:18 PM
RE: 610 help - by klondike98 - 03-14-2015, 09:10 PM
RE: 610 help - by Ron Ramirez - 03-14-2015, 10:13 PM



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