A1/C1 voltges (Solved)

Flyin_V · 2689

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Offline Flyin_V

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on: July 04, 2014, 09:03:43 PM
Just rechecked to voltages in the amp and A1/C1 and A4/C4 are 2.1 VAC. Is this too low?

Thanks.

Lary
« Last Edit: July 19, 2014, 10:24:11 AM by Flyin_V »


Offline Paul Birkeland

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Reply #1 on: July 05, 2014, 07:52:01 AM
There's a very good chance that your meter has a tough time reading voltages that low.  What's your incoming line voltage?  What's your A1/A4 and C1/C4 DC voltage to ground?

Paul "PB" Birkeland

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Offline Flyin_V

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Reply #2 on: July 05, 2014, 05:25:23 PM
There's 122 VAC from the wall, A1/A4 have 130 VAC and C1/C4 have 131 VAC to ground.

Lary


Offline Flyin_V

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Reply #3 on: July 06, 2014, 07:41:35 AM
DC to ground is 60 V +/-  .3 V.

Lary


Offline Paul Birkeland

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Reply #4 on: July 06, 2014, 02:20:25 PM
Quote from: Flyin_V on July 06, 2014, 07:41:35 AM
DC to ground is 60 V +/-  .3 V.

This is enough to say that your meter has a tough time reading low AC voltages.  With 2V AC on the 2A3 filaments, I would expect that DC voltage to be below 50.

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Flyin_V

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Reply #5 on: July 06, 2014, 05:30:00 PM
Thanks Paul.

Lary


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