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List:       elecraft
Subject:    Re: [Elecraft] KAT500/KPA500 issue
From:       "Kidder, George" <gkidder () ilstu ! edu>
Date:       2019-01-27 15:14:17
Message-ID: 39ca2085-ffe7-dbc9-f168-1db44098684a () ilstu ! edu
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I have had the coax connector between the ladder line and the coax arc 
over with high power on 75.  Might check that.
George, W3HBM

On 1/27/2019 8:49 AM, Dave wrote:
> Also check the ladder line at the ends for possible breaks.
> 
> I had one of the "optimized" G5RV antennas sold by W8AMZ which used solid wire in \
> the ladder line. Due to flexing in the wind the wire broke where it entered the \
> epoxyed pvc end cap (SO-239 connector) the plastic jacketing was still in place so \
> the wire would be fine under 20 watts tune but would arc under high power. 
> The fix was to rebuild the antenna using copper clad stranded ladder line.
> 
> Dave wo2x
> 
> Sent from my iPad
> 
> > On Jan 27, 2019, at 8:28 AM, Jack Satterfield <jack@satterfield.org> wrote:
> > 
> > Michael..good suggestion, will do later when the rain stops.
> > 
> > Thanks,
> > 
> > Jack
> > 
> > W4GRJ
> > 
> > 
> > 
> > From: Michael Blake [mailto:k9jri@mac.com]
> > Sent: Sunday, January 27, 2019 8:17 AM
> > To: Jack Satterfield
> > Cc: Elecraft Reflector
> > Subject: Re: [Elecraft] KAT500/KPA500 issue
> > 
> > 
> > 
> > Jack, I had a similar thing happen and it turned out to be a tree branch had
> > grown into the antenna path and when on high power the antenna was arcing to
> > the tree branch.  Might not be a tree branch but look for any signs of
> > possible arching in the antenna, feed line or connectors.
> > 
> > 
> > 
> > 73 - Mike - K9JRI
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > On Jan 27, 2019, at 8:10 AM, Jack Satterfield <jack@satterfield.org> wrote:
> > 
> > 
> > 
> > After 5 years of perfect operation, now a very strange issue
> > 
> > Bypass SWR 3 or 4:1
> > 
> > KAT500 tunes to 1.3:1
> > 
> > Switch amp to operate, operating SBB on first voice KAT500 goes full scale
> > swr and amp faults on high swr
> > 
> > Never had a issue before, antenna is g5rv
> > 
> > Any ideas appreciated.
> > 
> > Jack
> > 
> > W4GRJ
> > 
> > 
> > 
> > ______________________________________________________________
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> > 
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> > 
> > 
> > 
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> > 
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