[Elecraft] KXPA100 f/w 1.28 now production released

[Matt VK2RQ]

Yes, I believe this is mainly a problem for people with the KXAT100 ATU. If you don't have the ATU, then from what I've seen it will be unlikely to affect you.

73,
Matt VK2RQ

> On 18 May 2014, at 6:57 am, Bernie Wills <vk2wj at yahoo.com.au> wrote:
> 
> 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...]
>