[Elecraft] KXPA100 f/w 1.28 now production released

[Bernie Wills]

Hi Matt,

I've had the amp here for just over a week, and installed firmware 1.28 
after I finished assembly. I do not have the built-in ATU and am running 
the amp through a Kenwood AT-130 manual tuner. At this stage, I've only 
used the tuner 'straight through' because the antenna is resonant at the 
low end of 40m which is the only band I've used on-air.

I've been driving the amp with an Argonaut 539 set on 3 watts output, 
which yields about 80W from the amp. The only connection between the 539 
and the amp is a home-made keying line (coax). I've had one CW contact 
and one SSB contact with nothing odd observed. The SSB contact was last 
night for about 20 minutes which was to check if I had the radio and mic 
behaving, and the report to me was all good.

After assembly last week, I did extensive checking of amp output into a 
dummy load at various input power levels, up to 7 watts with the 
attenuator in and out of circuit. Again, nothing unusual.

Could it be an ATU-related problem?

Cheers,
Bernie. VK2WJ.

Message: 24
Date: Sat, 17 May 2014 14:06:56 +1000
From: Matt VK2RQ <matt.vk2rq at gmail.com>
To: Ron Cowherd <roncowherd at aol.com>
Cc: Elecraft Reflector <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] KXPA100 f/w 1.28 now production released
Message-ID: <91202E0B-924F-4CF9-9938-086CED9107E7 at gmail.com>
Content-Type: text/plain;    charset=us-ascii

Elecraft is right on top of it; I'm also confident we'll have a solution 
fairly soon.

73,
Matt VK2RQ

 > On 17 May 2014, at 1:52 pm, Ron Cowherd <roncowherd at aol.com> wrote:
 >
 > Yes, I have also had similar problems with the KXPA100 (SN#0876)and 
have already composed and sent a letter to support.  The letter is much 
too detailed to reproduce here but I also suspected a firmware glitch.  
My unit was working flawlessly until the upgrade.  I'm sure the problem 
will soon be solved.
 >
 > 73, Ron K4GYD
 >
 > Sent from my iPad
 >
 >> On May 16, 2014, at 6:56 PM, Matt VK2RQ <matt.vk2rq at gmail.com> wrote:
 >>
 >> How are people finding this new firmware?

[... remainder deleted by VK2WJ, a digest recipient...]