Resistance Check on 52

Emoreigns · 1369

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Offline Paul Birkeland

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Reply #15 on: May 23, 2024, 01:54:26 PM
If the resistance readings are good, be sure to check the resistors going to the tube socket pins themselves.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Emoreigns

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Reply #16 on: May 26, 2024, 08:16:28 AM
Paul, all resistors to the pins seem good too- Only thing I can think of is maybe I accidentally installed the potentiometers wrong… Could this explain the incorrect readings? I attached a photo of the potentiometers- Thanks Paul

~Happy Listening

Offline Paul Birkeland

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Reply #17 on: May 26, 2024, 09:18:43 AM
I can't think of a way for the potentiometers to cause an issue.  If the resistors all measure correctly and the terminals where the resistors are soldered to show the proper resistances, that would contradict the information initially presented.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Emoreigns

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Reply #18 on: May 30, 2024, 05:39:18 AM
Perhaps I am misinterpreting something Paul- I will make a detailed exhibit with some marked up photos of the readings I am getting tonight, and hopefully that will assist in the diagnostic.

Thanks again,

~Happy Listening

Offline Emoreigns

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Reply #19 on: June 02, 2024, 06:22:01 AM
Alright- I marked up everything from the previous resistance checks, from the manual, and that you asked me to do Paul! Hopefully this can shine some light on where I went wrong! I  am dying being stuck so close to the finish line on this one!

Thanks as always!

~Happy Listening

Offline Paul Birkeland

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Reply #20 on: June 02, 2024, 09:50:19 AM
Quote from: Emoreigns on May 10, 2024, 08:02:51 AM
The A4 & B4 terminal values are still off- A4 is still reading at 25 @ 40k and B4 was reading 80 @ 400k-
Is this still what's happening?  This isn't really possible if all the resistors measure properly. 

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Emoreigns

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Reply #21 on: June 03, 2024, 05:17:58 AM
Ya, unfortunately that still is the situation I am dealing with-   After going through and taking all those pictures and marking up the pdfs with the resistance measurements last night, I am more perplexed . 

What do you think is my next step?

~Happy Listening

Offline Paul Birkeland

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Reply #22 on: June 03, 2024, 06:45:40 AM
I see ~440 ohms on A1/A4/B1/B4 on those photos.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Doc B.

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Reply #23 on: June 03, 2024, 07:35:20 AM
Your 300B socket numbering for pin 3 and 4 is reversed. Suggest you check that and relabel the pins. That should solve your issue.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline Paul Birkeland

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Reply #24 on: June 03, 2024, 07:37:24 AM
Good catch!  I seem to remember doing that once in a manual...

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Emoreigns

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Reply #25 on: June 03, 2024, 12:45:49 PM
Oh fantastic! I'll double check this tonight!!! That would be fantastic!!!

Thanks as always gentlemen!

~Happy Listening

Offline Emoreigns

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Reply #26 on: June 04, 2024, 05:32:58 AM
Yepp- That did the trick! Got it all done now minus sanding and finishing the box with some semi gloss clear coat! Thanks again gentlemen for all your help

~Happy Listening

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