Re: Cleaning relay contacts

Dave - G4RQI


Unless someone says otherwise you might try this

David - G4RQI

From: <> on behalf of Mike GD6ICR <gd6icr@...>
Sent: Sunday, March 28, 2021 4:56:02 PM
To: <>
Subject: [UKMicrowaves] Cleaning relay contacts
Been going through my sma relays and testing them on my primitive spectrum analyser has shown that I have quite a few lossy relay on TX as high as 4dB and quite a few showing around 1dB on RX side. I wonder if anyone can suggest a suitable contact cleaning method - one suggestion Ive had is connect 12v thru 500ohm resistors to NO and NC and leave them switching for about 5 minutes

Some of the relays of coarse can be dismantled and cleaned but most cannot - any comments please

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