Re: K3 TX Calib Dummy Load Recommendations
Posted by
Don Wilhelm on
Aug 26, 2018; 1:56pm
URL: http://elecraft.85.s1.nabble.com/K3-TX-Calib-Dummy-Load-Recommendations-tp7644681p7644698.html
Some of the best dummy loads are built from Caddox Thick Film Resistors.
The 50 ohm resistors are non-reactive and flat up through 500 MHz.
They MUST be mounted on a heatsink to achieve their power rating.
Using careful wiring practices (close to zero length leads), you can
wire 4 of the 25 watt versions in series-parallel for a 100 ohm dummy
load, but there is a 100 watt version available that will do a better job.
73,
Don W3FPR
On 8/26/2018 8:50 AM, Bill Frantz wrote:
> For my KX3, I built a dummy load from three 150 ohm 2 watt resistors and
> a BNC connector. The resistors are in parallel with a lead going to the
> center conductor of the connector. The other leads are folded back over
> the resistors and attached to the ground-side of the connector. The
> whole outside is then covered with a piece of coax braid. It does well
> on the antenna analyser test Bob, K4TAX suggests.
>
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