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[Amps] Relay derating with frequency?

To: <amps@contesting.com>
Subject: [Amps] Relay derating with frequency?
From: w8ji at contesting.com (Tom Rauch)
Date: Wed Mar 12 18:27:39 2003
> I was wondering if and how this relay should be
> derated as you increase frequency.  I was thinking
> about using them as T/R relays.
> 73,

Bill,

You really need to measure a relay for current AND cut one open.

There amount of RF current and voltage varies a great deal from manufacturer
to manufacturer, some are great and will actually handle several kilowatts
and some are poor and won't handle 500 watts.

Make sure the armature (the steel part that moves) is not electrically
common with the contact. Also you would want to test it for RF heating.

73 Tom

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