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[Amps] Dow-Key Coaxial Relays`

To: <amps@contesting.com>
Subject: [Amps] Dow-Key Coaxial Relays`
From: kl7ra@blizzard.gcgo.nasa.gov (KL7RA)
Date: Mon, 4 Nov 2002 12:53:29 -0900
Hi Phil

>A good point was made today re the Dow-Key relays
>found in Harris equipment et al

The failure mode for the Dow-Key antenna relay in my
RF-103 was caused by using a modern transceiver that
burned the gold contacts when the 12 Ms close time was 
finally reached. 

I also repaired a friends 103 where the contacts were 
completely destroyed. It was driven by a TS-440 and SSB 
only.

But you are exactly correct about moisture. Dow-key relays 
in stack phasing boxes on towers are awful. That idea only
lasted one season.

73 Rich KL7RA



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