Atwater Kent 328 Early

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Atwater Kent 328 Early

Mondial
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Posts: 1,114
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Joined: Feb 2013
City: Irvington, NY

#22

10-11-2013, 08:31 AM

There should be a negative voltage on the grid cap of the 6K7. Close to zero when receiving no signal and several volts negative when tuned to a station. The negative voltage is produced by the AVC circuit, and the stronger the station the more negative it will be.

If you have a positive voltage on the grid cap, then you most likely have a bad 6K7. Considering that there was 260 V on the control grid of that tube, it is quite likely the tube has been damaged. Actually I am surprised that it still works at all !

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Atwater Kent 328 Early - by Eric - 09-24-2013, 08:09 PM

RE: Atwater Kent 328 Early - by Radioroslyn - 09-24-2013, 09:22 PM

RE: Atwater Kent 328 Early - by Eric - 09-25-2013, 11:32 AM

RE: Atwater Kent 328 Early - by Mondial - 09-25-2013, 02:51 PM

RE: Atwater Kent 328 Early - by Eric - 09-25-2013, 06:14 PM

RE: Atwater Kent 328 Early - by marty - 09-25-2013, 06:33 PM

RE: Atwater Kent 328 Early - by Eric - 09-25-2013, 07:31 PM

RE: Atwater Kent 328 Early - by Arran - 09-25-2013, 10:35 PM

RE: Atwater Kent 328 Early - by Eric - 09-25-2013, 11:08 PM

RE: Atwater Kent 328 Early - by Mondial - 09-26-2013, 12:05 AM

RE: Atwater Kent 328 Early - by Arran - 09-26-2013, 12:08 AM

RE: Atwater Kent 328 Early - by Eric - 09-26-2013, 03:18 PM

RE: Atwater Kent 328 Early - by Eric - 10-06-2013, 11:29 AM

RE: Atwater Kent 328 Early - by Mondial - 10-06-2013, 11:51 AM

RE: Atwater Kent 328 Early - by Eric - 10-07-2013, 08:54 PM

RE: Atwater Kent 328 Early - by Eric - 10-08-2013, 06:56 PM

RE: Atwater Kent 328 Early - by Mondial - 10-08-2013, 08:28 PM

RE: Atwater Kent 328 Early - by Eric - 10-09-2013, 11:10 AM

RE: Atwater Kent 328 Early - by Eric - 10-09-2013, 05:15 PM

RE: Atwater Kent 328 Early - by Mondial - 10-09-2013, 06:39 PM

RE: Atwater Kent 328 Early - by Eric - 10-10-2013, 03:28 PM

RE: Atwater Kent 328 Early - by Mondial - 10-11-2013, 08:31 AM

RE: Atwater Kent 328 Early - by Eric - 10-11-2013, 08:15 PM

RE: Atwater Kent 328 Early - by Mondial - 10-11-2013, 11:16 PM

RE: Atwater Kent 328 Early - by Eric - 10-12-2013, 11:38 AM

RE: Atwater Kent 328 Early - by Mondial - 10-13-2013, 10:31 AM

RE: Atwater Kent 328 Early - by Eric - 10-13-2013, 12:18 PM

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