[Elecraft] KXPA100 with PX3

[Don Wilhelm]

Ray,

Did you do the basic KX3 Power Calibration as well as the Power 
Calibration with the KXPA100?  See Appendix B of the KXPA100 manual.

The external wattmeter has nothing to do with it, the power is measured 
internally by the KX3 and KXPA100 circuits.

You will need a good 50 ohm dummy load that is flat through 6 meters.

73,
Don W3FPR

On 1/2/2017 12:42 PM, rsoifer1 at aol.com wrote:
> Hi Don,
>
> I tried that but an external wattmeter confirmed the KXPA100 forward 
> and reflected power readings.  Something in the KX3 is holding down 
> the power output when PA is ON, but not when PA is off.
>
> 73 Ray W2RS
>
>
> -----Original Message-----
> From: Don Wilhelm <donwilh at embarqmail.com>
> To: rsoifer1 <rsoifer1 at aol.com>
> Cc: elecraft <elecraft at mailman.qth.net>
> Sent: Mon, Jan 2, 2017 10:33 am
> Subject: Re: [Elecraft] KXPA100 with PX3
>
> Ray,
>
> Have you tried running the TX Gain Calibration on the KX3?
> It may be that the KX3 wattmeter is not well calibrated.
>
> If you do the TX Gain Calibration manually, it must be done on each band.
> The KX3 Utility automates the process.
>
> 73,
> Don W3FPR
>
> On 1/2/2017 11:55 AM, rsoifer1 at aol.com <mailto:rsoifer1 at aol.com> wrote:
> > Don and others,
> >
> > The good news is that you were right: the RJ-45 connectors in the
> > control cable were not making good contact. I fixed that and PA ON
> > operation of the KXPA100 is now working.
> >
> > The bad news, however, is that in Basic operation with PA OFF, the
> > KX3/KXPA100 puts out full power, but the most I can get out of it with
> > PA ON is 50-60 watts. The attenuator is set for OUT/AUTO and there is
> > no more than 1 or 2 watts reflected power.
> >
> >
>