[Elecraft] KXPA100 SN 707 Total Frustration with this Amp

[Brian Hunt]

Have you tried any testing with a 50 ohm dummy load?  After the KX3, after the KXPA, after the AL80b?  Seems like that would let you isolate who the culprit is. 

Just my $0.02

Brian. K0DTJ

> On Mar 9, 2014, at 18:07, rldillon at aol.com wrote:
> 
> 
> The high SWR happens even when the AL80b or Palstar tuner is not connected. In other words when coax from the kpxa100 goes direct to the K4KIO Hexx beam with nothing in between to confuse the amp except a barrel connector.
> 
> Yes you can drive a larger amp with the kx3 and KXPA100. It is covered on page 19 of the manual in paragraph titled Keying an External Amplifier. 
> 
> 
> -----Original Message-----
> From: Dr. William J. Schmidt, II <bill at wjschmidt.com>
> To: rldillon <rldillon at aol.com>; elecraft <elecraft at mailman.qth.net>; KX3 <KX3 at yahoogroups.com>
> Sent: Sun, Mar 9, 2014 8:49 pm
> Subject: RE: [Elecraft] KXPA100 SN 707 Total Frustration with this Amp
> 
> 
> Am I reading this correctly?  You are driving an AL80B with the KXPA100
> being driven by the KX3?  That's quite imaginative if that's correct.  The
> SWR fault is coming from the AL80B input circuit not your antenna (the KXPA
> can't see the SWR on the other side of the AL80B).  probably something bad
> in the input circuit of the AL80B causing the high SWR...
> 
> 
> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
> 
> Owner - Operator
> Big Signal Ranch
> Staunton, Illinois
> 
> email:  bill at wjschmidt.com
> 
> 
> 
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