[Amps] Vacuum Relay Question

[Aleksandar Petkovic]

Yes, I did. . . . . . After the fact.😁😁

I had it strike from within in one of my amplifiers a couple of months 
ago. A failed vacuum relay in the output resulted in the loading wafer 
of the bandswitch getting a direct hit of 'lightning from within."

Luckily I was able to get a spare wafer. The replacement process is not 
going to be much fun.

73, Alek., VK6APK

PS: I wasn't using the W7RY QSK.😁


On 28/07/2021 7:33 pm, Jim wrote:
> And specifically lightning causing issues.
> So there's that...
>
> Did you see the smiley face at the end of my statement?  Perhaps not....
>
>
> Thanks
> 73
> Jim W7RY
>
> On 7/28/2021 1:31 AM, Aleksandar Petkovic wrote:
>> 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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