Female rca's [resolved]

mpribble · 2112

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Offline mpribble

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on: January 13, 2019, 03:39:01 PM
Finished my crack all test were good resistance readings on 1,2,4,5 and 13 would just keep climbing guess this normal? Anyway plugged everything in and no left channel black rca. Swapped rca around same thing but if I pull up male rca a little it works. Connection looks good is it possible i got it to hot? This is a stock crack as of now. Thankd
« Last Edit: January 31, 2019, 04:22:56 AM by Paul Birkeland »


Offline Paul Birkeland

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Reply #1 on: January 13, 2019, 03:40:59 PM
What are your voltages?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline mpribble

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Reply #2 on: January 13, 2019, 03:49:36 PM
1-78
2-177
3-0
4-177
5-76
6-0
7-101
8-0
9-100
10-0


Offline Paul Birkeland

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Reply #3 on: January 13, 2019, 03:58:18 PM
Quote from: mpribble on January 13, 2019, 03:39:01 PM
no left channel black rca.
Can you explain what you mean by this?  Do you get no sound from the left channel of your headphones?
Quote from: mpribble on January 13, 2019, 03:39:01 PM
if I pull up male rca a little it works.
If you pull the headphone plug part way out, you will short the right and left headphone drivers to the right output of the Crack, so there isn't any useful information there.

It's most likely that you have a bad solder joint, or potentially perhaps a solder bridge across the left RCA jack.  How are the resistance readings on the center pins of the RCA jacks?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline mpribble

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Reply #4 on: January 13, 2019, 04:10:12 PM
Got 95.8 on both center pins and 0 on ground tab. Yes on sound on left in headphones. Headphone plug is all the way in first thing I checked. I'm talking about rca coming from my source the rca closest to edge of top plate. Plugged all the way in no sound pull up on rca  cable on that rca Jack and have sound. Sorry so confusing


Offline Paul Birkeland

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Reply #5 on: January 13, 2019, 04:18:50 PM
Can you post photos of the wiring on the jack?

Paul "PB" Birkeland

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Offline mpribble

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Reply #6 on: January 13, 2019, 04:26:54 PM
I will try probably be tomorrow. What you think about my voltage readings?


Offline Paul Birkeland

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Reply #7 on: January 13, 2019, 04:27:47 PM
Quote from: mpribble on January 13, 2019, 04:26:54 PM
I will try probably be tomorrow. What you think about my voltage readings?
Looks like a working amp.  That narrows things down to either the input wiring (RCA jacks to pot) or the output wiring (terminals 6-10/headphone jack).

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline mpribble

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Reply #8 on: January 13, 2019, 04:41:21 PM
I did touch the white wire  closer to the volume pot with soldering iron melted little of the jacket?


Offline mpribble

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Reply #9 on: January 14, 2019, 03:10:00 AM
Hope these pics work?


Offline Paul Birkeland

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Reply #10 on: January 14, 2019, 04:24:39 AM
Stuff like this can totally short out a channel if it allows the center pin of the RCA jack to touch the outside.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline mpribble

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Reply #11 on: January 14, 2019, 05:18:19 AM
Thanks, what you think clean it up and solder again?


Offline Paul Birkeland

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Reply #12 on: January 14, 2019, 05:19:57 AM
If you have a pair of side cutter type wire cutters, you can just cut any of that schmoo right off the jack.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline mpribble

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Reply #13 on: January 14, 2019, 05:28:04 AM
Thanks for the help will try tonite and let you know.


Offline mpribble

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Reply #14 on: January 19, 2019, 07:31:27 AM
Looks like I need to replace a rca Jack which ones should I get? Just want to make sure they will fit in top plate. Thanks


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