relay popping

phsyconoodler · Post by **phsyconoodler** » Fri May 02, 2008 5:54 am

What is the best way to stop pops when using relays?I have a non-Dumble amp that I put relay boost switching into and it pops loudly when switching.My Dumble style amps are noise free.

brownnote · Post by **brownnote** » Fri May 02, 2008 6:45 am

Do you have a diode across the coil?

phsyconoodler · Post by **phsyconoodler** » Fri May 02, 2008 3:33 pm

Yes there is a diode .

briane · Post by **briane** » Mon May 05, 2008 2:10 am

Ive seen popping from what I assumed was coupling caps charging (ie being fully switched in and out of the signal and HV path). Also could be an issue of a ground reference, which a 5m or 10m to ground the right place might clear up. Depends on the specifics I would say.

just some educated guesses, couple of things to try.

glasman · Post by **glasman** » Mon May 05, 2008 7:27 pm

Where are you deriving the relay supply power from?

Is the diode mounted physcally close to the relay (say less than .5")?

Gary

phsyconoodler · Post by **phsyconoodler** » Tue May 06, 2008 12:37 am

It lifts the resistor off ground on the bass pot of a fender amp.I have the 5v winding of the PT ,same power supply board and rely board as my dumble clones.I'm thinking that it is the ground that's the problem.I lose the ground through the 6.8k resistor and footswitch it in again and it pops.I'm going to try a 220k resistor to ground so it always has a reference.

Structo · Post by **Structo** » Tue May 06, 2008 12:59 am

I would try a higher resistor like a 10M.

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relay popping

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