Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: pierrot on February 14, 2020, 10:37:42 PM

Title: Feedback through headphones, looking for advice [resolved]
Post by: pierrot on February 14, 2020, 10:37:42 PM

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.

Title: Re: Feedback through headphones, looking for advice
Post by: Paul Birkeland on February 16, 2020, 04:46:01 PM

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.

Title: Re: Feedback through headphones, looking for advice
Post by: pierrot on February 16, 2020, 06:37:09 PM

Thanks, I'll do that and report back.

Title: Re: Feedback through headphones, looking for advice
Post by: pierrot on February 23, 2020, 11:05:58 PM

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!

Title: Re: Feedback through headphones, looking for advice
Post by: Paul Birkeland on February 24, 2020, 05:01:32 AM

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

Title: Re: Feedback through headphones, looking for advice
Post by: pierrot on February 25, 2020, 08:48:36 PM

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.