Finished building and the sounds is amazing, out of one channel [resolved]

heartlessnomad12 · 559

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Offline heartlessnomad12

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Left channel has no sound at all, but tubes to light up so hopefully something silly. Will check solders tonight and check all the readings on that side, anything common that people goof up to start with?  swapped tubes/inputs side to side and no impact so something i caused, sigh dead channel has a hum and bias pot seems to be working so narrows things down a bit.
« Last Edit: February 22, 2021, 02:49:05 PM by Paul Birkeland »



Offline Paul Birkeland

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Reply #1 on: February 22, 2021, 12:36:47 PM
You would want to start with a voltage and resistance check long, long before you ever hooked the amp up to listen to it.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline heartlessnomad12

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Reply #2 on: February 22, 2021, 12:37:59 PM
Did both resistance and voltage, both checked out



Offline heartlessnomad12

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Reply #3 on: February 22, 2021, 12:39:53 PM
Or at least I thought they checked out, so need to check again



Offline Paul Birkeland

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Reply #4 on: February 22, 2021, 12:47:50 PM
Let us know how those turn out.  I can give you instructions on temporarily soldering in jumpers in certain spots to see where things are dropping out if all the voltages are good.

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline heartlessnomad12

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Reply #5 on: February 22, 2021, 02:11:45 PM
Terminal 14 is reading 0 so need to check things running in and out later tonight



Offline heartlessnomad12

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Reply #6 on: February 22, 2021, 02:34:52 PM
shame on me for measuring before wrestling the C4S in place and i think breaking a connection, back in two channel business!!



Offline Paul Birkeland

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Reply #7 on: February 22, 2021, 02:48:55 PM
Just to be extra sure, with the amp running give it a few hard taps on the top plate with your hand.  Often if you have any other broken wires, they will move and make audible noises when you bang on the chassis plate. 

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline heartlessnomad12

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Roger that