[Amps] Vacuum Relay Question

Jim Brown jim at audiosystemsgroup.com
Mon Jul 26 13:59:00 EDT 2021


I don't understand this concern. Vacuum relays have been widely used for 
decades for antenna switching in power amps, where the impedance, and 
thus voltage and current, are the same as for this application.

What am I missing?

73, Jim K9YC

On 7/26/2021 3:08 AM, Rob Atkinson wrote:
> I would not use a vacuum relay in a matching network for a 1/4 w.
> antenna.   That's a low v. high current setup calling for open frame
> contactors or at least large open relays.  Perhaps this information
> will render your question moot.




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