I think that the point was that the expensive vacuum relay could be
replaced by a much cheaper open frame relay arrangement in this
application, where high impedance/voltage is not in the equation.
Tens of dollars versus hundreds of dollars makes good sense when the
lightning comes to town.
73, Alek, VK6APK
On 27/07/2021 1:59 am, Jim Brown wrote:
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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