Relay switching noise

[Twanger]

Hi all,

In my last project im using a relay to bypass a preamp, im getting a big pop when i engage the relay, is there a fix for that ?

Thanks

John

[jcm-jmp]

tie a diode across the coil of the relay. and if it still pops use a large 2200uf low voltage cap on the positive side of coil to ground.

[tubesornothing]

Is the switch in series with the preamp?  This often causes pop, adding another switch shunting to ground cures the pop.

[JayB]

That or make sure grids are not flying free before and after the relay. They need a ground reference or the voltage builds up after the cap.

[Twanger]

thank you all for your help, I will try the tricks you proposed and see if it cures the problem.

John