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Old 27th November 2012, 10:19 PM   #1
diyAudio Member
Join Date: Jan 2011
Default help with muting relay

hello, working on a muting relay circuit, this will unground (unshort) the preamp output a few seconds after startup allowing the preamp output to flow on to the next stage. (esp design)

any suggestions on a relay i could use for this?

source ac will be around 20v (i know how to bring it down if need be to a lower voltage), needs to pull around 15ma at the coil and the 20v ac applied will disconnect the grounded preamp outputs.

i have no idea how to go about choosing a relay.. any help for this newb?
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Old 28th November 2012, 01:03 AM   #2
DUG is offline DUG  Canada
diyAudio Member
Join Date: Jan 2003
Location: mississauga ontario canada
Look for small signal type relays "<2A".

I have a preference for IM series of relays (DigiKey)

I have also used G6K types.

The IM have a minimum switching voltage of 100uV. This is the type of number that is nice to find in the data sheet.

The G6K types have a "Min. permissible load" of 10 μA at 10 mVDC.

You will want to have very small numbers like this for signal switching.

IMHO of course.
Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
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Old 28th November 2012, 03:28 PM   #3
diyAudio Member
Join Date: Jan 2011
excellent, i really appreciate it, sir! that helped tremendously. i kinda lost with all of the options for relays!

kinda new to the whole diy world.. and there are a lot of options to choose from. digikey is not the easiest to navigate when you don't know what you are looking for.

the g6k model is exactly what i am looking for.

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