2330 Snap Crackle Pop

[ivandezande]

I restored this 2330 (non-B) this spring and went all out on it. All new transistors and even the BA312’s were replaced.
Outputs were left alone, and now here’s my question; can they cause (pretty loud) crackles and pops? It’s only in the left channel, and it’s for sure in the amp section since volume does not affect it.

 

[ivandezande]

Update: No. And I replaced all the diodes.

 

[petehall347]

try cleaning board connectors . and speaker switches

 

[tonebells]

I had a polystyrene capacitors in a Marantz 19 tone board make me nuts with scp. Freeze spray made it show up after a lot of work narrowing it down.

Tony

 

[Lavane]

It's possibly a bad solder joint. I had a crackle and pop in a tube amp I built and it turned out to be a cracked solder joint. I couldn't see anything bad even with a magnifier. So I put the amp upside down, turned it on and watched. Sure enough there was a pop I was able to locate where it came from. I even saw a small spark. As the amp warmed up, the solder joint lifted just enough to break contact to ground.

 

[EastPoint]

Power it up, get a chopstick, and tap stuff on the amp board's left channel and see if that affects anything.

 

[ivandezande]

Thanks everyone!
This happens only after 30-45 minutes of warm up time, so I think I'll do all the solder joints, then poke around.

 

[ivandezande]

Solder joints fixed it.

 

[tonebells]

!

Tony