redart
New Member
Hi All,
I have a switching circuit that I'm using to compare two audio amplifiers. The circuit comes courtesy of Elliott Sound Products.
My problem is that when the relays (K1 & K2) energised / de-energise, there is an annoying click that comes thru the speakers. It's especially bad when passing a 100Hz test signal.
Being an electronics newbie I know very little about curing this type of (RF?) interference. I've tried adding bypass caps between power and ground (0.1uF to 47uF) with little or no effect. Do I need an RF choke?. If so can I make one?. Power is 12V DC.
Any suggestions on how to filter this click out would be much appreciated.
I have a switching circuit that I'm using to compare two audio amplifiers. The circuit comes courtesy of Elliott Sound Products.
My problem is that when the relays (K1 & K2) energised / de-energise, there is an annoying click that comes thru the speakers. It's especially bad when passing a 100Hz test signal.
Being an electronics newbie I know very little about curing this type of (RF?) interference. I've tried adding bypass caps between power and ground (0.1uF to 47uF) with little or no effect. Do I need an RF choke?. If so can I make one?. Power is 12V DC.
Any suggestions on how to filter this click out would be much appreciated.