[Elecraft] KPA500 Faulting on high SWR on power rise

[Walter Underwood]

The Amphenol voltage rating for UHF connectors is 500 V peak. So the connectors could be another weak point.

https://www.amphenolrf.com/connectors/uhf.html

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Feb 24, 2018, at 11:07 AM, Bill Johnson <k9yeq at live.com> wrote:
> 
> 1000v to me could be too low for a 500W amp.  You can for the time being leave the plug out, just disconnect when you are not using your equipment.  I use a remote disconnect to remove the antennas at my remote grounding panel.
> 
> 73,
> Bill
> K9YEQ
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of Chris Hallinan
> Sent: Saturday, February 24, 2018 10:51 AM
> To: donwilh at embarqmail.com
> Cc: Wes Stewart <wes_n7ws at triconet.org>; <elecraft at mailman.qth.net> <elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] KPA500 Faulting on high SWR on power rise
> 
> Not sure.  I pulled the plug out and Googled the numbers on it.  The plug is labeled CG2 1000, which I think means it is a 1000V breakdown voltage.
> It appears to be a Littlefuse device, according to Allied Electronics which has the leaded version of the part for $2 ;)
> 
> Without knowing for sure, 1000V seems plenty for a 500W amp into approximately 50 ohms load.  Note I have the surge protector on the low SWR side of the tuner which is mounted under an eve of the house.  Probably not ideal but that's another issue ;)
> 
> Chris
> 
> 
> 
> On Sat, Feb 24, 2018 at 11:06 AM, Don Wilhelm <donwilh at embarqmail.com>
> wrote:
> 
>> Chris,
>> 
>> What is the possibility that you have an HP suppressor body and a 200 
>> watt Arc-Plug?
>> 
>> 73,
>> Don W3FPR
>> 
>> 
>> On 2/24/2018 10:32 AM, Chris Hallinan wrote:
>> 
>>> Hi Wes. Appreciate the feedback.  I'm certainly not impressed by 
>>> having one marked HP that is clearly not.  See my earlier post: the 
>>> surge protector was my problem all along.  It's arcing at about 300W.
>>> 
>>> 
> 
> 
> --
> Life is like Linux - it never stands still.
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