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August 12, 2022, 08:33:40 PM

Author Topic: Right Channel Hum  (Read 489 times)

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Offline thoven0215

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Re: Right Channel Hum
« Reply #15 on: July 03, 2022, 12:06:26 PM »
Other pics

Offline Paul Birkeland

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Re: Right Channel Hum
« Reply #16 on: July 03, 2022, 02:51:52 PM »
Does the 2.49K resistor still measure 2.49K?
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline thoven0215

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Re: Right Channel Hum
« Reply #17 on: July 21, 2022, 01:55:55 PM »
My apologizes for the late response, came back from a trip and had a case of covid. The 2.49 resistor measures at around 0.08 now.

Offline Paul Birkeland

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Re: Right Channel Hum
« Reply #18 on: July 21, 2022, 02:26:42 PM »
I would start by replacing that part and the TL431 on that side as well.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline thoven0215

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Re: Right Channel Hum
« Reply #19 on: July 23, 2022, 01:49:40 PM »
Did you mean the LM431 regulator? I looked at the parts list for the shunt regulator and only saw the LM431 and no TL431.

Offline Paul Birkeland

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Re: Right Channel Hum
« Reply #20 on: July 23, 2022, 03:18:55 PM »
Yes, they are the same part from different manufacturers. 
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline thoven0215

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Re: Right Channel Hum
« Reply #21 on: July 31, 2022, 11:18:06 AM »
I just want to confirm that my JC2907AN43 is the same as the PN2907A transistor.

Offline Paul Birkeland

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Re: Right Channel Hum
« Reply #22 on: July 31, 2022, 01:22:50 PM »
Correct. 
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man