[Amps] issue with AL-1200 output -UPDATE NUMBER 2-

[Carl]

Adjustable spark gaps are also common on commercial AM modulation 
transformers down to at least the 500W size. These go back into the 40's and 
maybe earlier.

Carl


----- Original Message ----- 
From: "Doug Ronald" <doug at dougronald.com>
To: <amps at contesting.com>
Sent: Tuesday, June 27, 2017 1:59 PM
Subject: Re: [Amps] issue with AL-1200 output -UPDATE NUMBER 2-


>I have three Collins CU-1169 antenna tuners where each vacuum variable has
> spark gaps. Of course being Collins, the gaps are adjustable silver plated
> spheres with current sample resistors for the electronic hardware to sense
> when an arc has occurred. I am parting-out these couplers if anyone has
> interest...
>
> -Doug W6DSR
>
> -----Original Message-----
> From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Tom Osborne
> Sent: Tuesday, June 27, 2017 10:07 AM
> To: amps at contesting.com
> Subject: Re: [Amps] issue with AL-1200 output -UPDATE NUMBER 2-
>
>>
>>  ##Then a mating, non adjustable,  ground down, 2nd machine screw.
>> Then some locking nuts etc, so when adjusted, tweaked,  to the desired
>> gap, its then locked down.
>>
> ____________________________________________________________
>
> Hii Jim
>
> Would this work in an antenna tuner to keep it from arcing and blowing out
> the bandswitch?  How do you know when this is adjusted right?   73
> Tom W7WHY
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