[Amps] Vacuum relays in Dentron MLA-2500

Pete Smith n4zr at contesting.com
Fri Dec 26 21:50:18 EST 2003


At 02:28 PM 12/26/03 -0800, Vic Rosenthal wrote:
>See <http://www.somis.org/QSK922.html>, Rich Measures' article on vacuum 
>relay QSK.  He uses a reed relay for the input and an RJ1A or HC-1 vacuum 
>relay for the output.  I have used a similar circuit in at least three 
>amplifiers so far, and it is ABSOLUTELY SILENT if you follow his advice to 
>use silicon rubber to mount it and thin pieces of copper foil to make the 
>leads.  Foil works better than braid, becasue the braid wicks solder and 
>ends up rigid.


Well, I'm perplexed.  My braid connections are not rigid, I used a small 
vacuum relay for the input side, and absolutely silent is never a term I'd 
use.  Maybe I could have done something different, but it's hard to know 
what....


73, Pete N4ZR
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