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List:       elecraft
Subject:    [Elecraft]  KPA500 Faulting on high SWR on power rise
From:       <john () kk9a ! com>
Date:       2018-02-25 23:42:01
Message-ID: 001b01d3ae92$3c330070$b4990150$ () com
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Your 5KW example is RMS voltage and peak would be 707v. I am not sure how
much moderate SWR effect this value but clearly the 1000v Alpha Delta
discharge tube should be adequate for an Elecraft KPA-500 unless the SWR is
horrible.

John KK9A


From: K4TAX
Date: Sat Feb 24 19:46:55 EST 2018

Based on the specification of 500 volts peak,    5KW at 50 ohms = 500 
volts.  It would seem the PL-259 is adequate for ham radio applications 
per specification to 0.3 GHZ or 300 MHz without issues.     Of course 
one is dealing with 50 ohms, which implies essentially a 1:1 SWR.

73

Bob, K4TAX

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