Feedback through headphones, looking for advice [resolved]

[pierrot]

Hi All,

I'm having a bit of difficulty troubleshooting my crack build and i'm looking for advice on how to fix my issue.

I'm mainly getting the rubbing sound feedback every now and then and I haven't been able to fix it. I think it started when I installed the speed ball 1.1 OTL upgrade.

using leadless solder and a soldering iron that goes to 480 degrees C.

So far I've been going through the joints and reheated all of the ones that looked a bit dodgy. Probably missed some though!

thanks!

edit: the last board had one of the wires fall off when I was moving it to take a picture, going to resolder it on later.

 

[Paul Birkeland]

I would get some 60/40 solder with lead and touch up every single joint in the amp.

This is what I do for factory repairs that come in with lead free solder.

 

[pierrot]

Thanks, I'll do that and report back.

 

[pierrot]

Alrighty,

I've basically added a dab or redid the solder joints that had too much solder after a dab with 60/40 lead solder.

Unfortunately I still have an intermittent crackle/squeel in both sides

All the LEDs light up and both the tubes light up.


Please advise

Thanks!

 

[Paul Birkeland]

Can you repost some new photos? Did you use any separate flux during any portion of this soldering?

 

[pierrot]

I didn't use any additional flux, but after leaving the amp turned on for the last 48 hours the fuzzy noise has mostly gone away.

Maybe it just needed to burn in

Thanks for the assistance Paul! I'll come back if I experience any significant background noise.