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I don't normally do this, but I was fussing around a specific TMB build and thought I'd try it and see if I could eliminate all hum. It didn't make much of a difference, but I had a heck of a time soldering the 22 guage buss bar to the back of the Alpha pots. I'm not happy with the soldering quality so ..

Any tips for doing a good job on soldering the buss bar?

P.S. there is no hum at all on the build.

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

I've found that a thick gauge bus bar tends to almost act like a heat sink...and it disipates heat quicker than you can apply it, when using a regular 30w soldering iron.

I've resorted to using my weller 100w/140w gun on bus bars with good success. I set it to 100w and go to town. It allows me to get a good solder connection quicker and since the bar itself seems to disipate the heat, it doesn't damage any connected components.

Well, I lifted the buss bar off the pots and there was no change in hum. In other words, the TMB was still silent. So, as a result, I won't use this grounding technique.

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

I wrecked a CTS pot trying to solder a ground on it so I never do it now.
Nigel

Ooohh. Now that hurts. I think the idea is founded in 'history' and that's where's it going to stay As Far As I'm Concerned.

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

Use flux. This will help draw the solder to the metal. Pick some up and try it on a couple of solder joints. You may not use this type of buss in a new build but you might find yourself repairing someones amp in the future (replacing a pot for example).

I usually rough upthe back of the pot with a dremel, when do solder a buss wire across the pots.

I turn on the bench grinder for a few seconds, that does the trick

Thanks, I decided not to solder the pots in the end. And I have no hum either. I'll stick with the ground buss approach.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps