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Re: [Amps] Vacuum Relay Question

To: amps@contesting.com
Subject: Re: [Amps] Vacuum Relay Question
From: Aleksandar Petkovic <vk6apk@bigpond.com>
Date: Wed, 28 Jul 2021 14:31:25 +0800
List-post: <mailto:amps@contesting.com>
The discussion pertained to relay connections in the matching network for a HF vertical antenna.

73, Alek, VK6APK

On 28/07/2021 7:07 am, Jim wrote:
But there is no lightning inside of an amplifier... Hopefully. :)


Thanks
73
Jim W7RY

On 7/26/2021 12:59 PM, 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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