[Amps] contact bounce

[James Irving]

Someone recently described a way to "hot shot" a relay circuit.  First...They proposed to double the voltage.
Second... Put a resistor in series with the normal speed coil.
Third... The faster speed relay would have the same value resistor, but paralleled by electrolytic cap. 

Why not try to reverse the thinking for your problem.  Instead of speeding up the output relay, slow down the input relay.  Put a low value resistor in series with the input relay... just a couple of ohms to limit current surge. After that, put a capacitor across the relay coil, just big enough to give you a couple of msec delay before the cap charges.

There will also be a slight delay on releasing the relay, but no rf should be coming from the amp.

Haven't tried it.  Would only work with dc relays, and the relay power source would need to deliver a little surge.

73, Jim, k9jfk
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Message: 2
Date: Sun, 4 Apr 2010 00:47:23 EDT
From: PACER99 at aol.com
Subject: [Amps] contact bounce
To: amps at contesting.com
Message-ID: <758b.3c566ad9.38e973db at aol.com>
Content-Type: text/plain; charset="US-ASCII"

Hey guys,..........
My idea is to slow down the input relay slightly to save the output relay. 
I dont think that the input relay will fail when hot switching the 200
watts RF  input where the output relay which switches 2 KW has problems.

73
larry
n7dd
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