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[AMPS] RJ1A relays

To: <amps@contesting.com>
Subject: [AMPS] RJ1A relays
From: measures@vc.net (Rich Measures)
Date: Thu, 1 Jul 1999 06:24:58 -0700


>
>?  Fair Radio Sells virtually unused RJ-1A relays for $35.
>Single lot
>new ones cost around 4x as much.  However, if the NO contact
>BV is under
>3500v, the ceramic/metal seals are leaking.
>Rich...
>
>
>Does leakage cause corrosion or other problems that make
>them unusable? 

?   The problem is not corrosion.  Air in the output vac. relay will 
eventually destroy the input relay.  A new RJ-1A typically has a DC 
breakdown potential of 5000v.  However, if a ceramic-metal seal is 
leaking, the breakdown potential will be decreasing.  .  

>2kW in 50 ohms is 450V peak. Allowing even
>double for high VSWR and mistuning is only 900V.
>
?  True.  However, 900v will probably destroy the input relay, so it is 
important that the output relay not be leaky.   

-  cheers, Steve
>
>
>
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Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


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