[Elecraft] wattmeter calibration

[Robert Tellefsen]

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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