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

[heartlessnomad12]

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.

 

[Paul Birkeland]

You would want to start with a voltage and resistance check long, long before you ever hooked the amp up to listen to it.

 

[heartlessnomad12]

Did both resistance and voltage, both checked out

 

[heartlessnomad12]

Or at least I thought they checked out, so need to check again

 

[Paul Birkeland]

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

 

[heartlessnomad12]

Terminal 14 is reading 0 so need to check things running in and out later tonight

 

[heartlessnomad12]

shame on me for measuring before wrestling the C4S in place and i think breaking a connection, back in two channel business!!

 

[Paul Birkeland]

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. 

 

[heartlessnomad12]

Roger that

 

[heartlessnomad12]

Sigh, after years of flawless service the left channel now takes a few minutes before it starts working. Swapped tubes and problem persists. Waiting on a new multimeter to be delivered, any thoughts on where to start reflowing joints while I wait? I figure where I had the issue last time around terminal 14 would be a good start.

 

[Paul Birkeland]

I would wait till you have a meter and can double check on those DC voltages.

 

[heartlessnomad12]

Spent the whole day checking voltages, everything ok, so did it over and over again. then swapped the speaker cables by accident during the nth hookup, and it worked, cable was lose on the speaker terminal. glad i figured it out, was getting very close to making a trip to fairwood to drop it off and to visit the parents.