[Amps] Vacuum Relay Question

[Peter Voelpel]

I prefer vacuum relays outside, they are immune to corrosion and not that
expensive when ex military stock from Russia like B1B or B2B SPST types.

73
Peter

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Aleksandar
Petkovic
Sent: Dienstag, 27. Juli 2021 02:00
To: amps at contesting.com
Subject: Re: [Amps] Vacuum Relay Question

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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