[Elecraft] wattmeter calibration

[Stewart Baker]

On receive 13.7V drops to 13.2V @ 50W.

73
Stewart G3RXQ
On Sun, 16 Mar 2008 09:10:59 -0800, Robert Tellefsen wrote:
> Hi Stewart
> Just out of curiousity, what is the supply voltage
> to your K3 at the K3?
> 73, Bob N6WG
>
> ----- Original Message -----
> From: "Stewart Baker" <stewart at baker.nildram.co.uk>
> To: "Mike Penkas" <mpenkas at comcast.net> 
<elecraft at mailman.qth.net>
> Sent: Sunday, March 16, 2008 7:18 AM
> Subject: Re: [Elecraft] wattmeter calibration
>
>
> Using 3 different pieces of test equipment to measure the RF
> output power, together with a precision dummy load VSWR <1.02, I
> am unable to get more than 44W out at a requested level of 50W.
> WMTR setting is flat out at 30. At 120W I get 106W out.
>
> Raised this with Support and Wayne and they are looking into it.
>
> Also the gain calibration routine in the manual is very sparse 
and
> confusing.
>
> 73
> Stewart G3RXQ
> On Sun, 16 Mar 2008 10:45:14 -0400, Mike Penkas wrote:
>> Same here with the wattmeter calibration.  Using a new Array
> Solutions PowerMaster w/
>> 5% accuracy and when I get down to 30 on the calibration it is
> still just under 5 watts
>> or around 45-50 watts.  Same whether on dummy load or perfectly
> matched antenna. And-
>> yes I have done the transmitter gain calibration.
>> Mike WA8EBM
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