[Elecraft] Fw: Don't have a 50W dummy load

Charlie T, K3ICH pincon at erols.com
Wed Mar 25 23:13:33 EDT 2015


Yes, but the inductances are all in parallel.  I built a decent dummy load 
out of 24, 1200 Ohm, 10 watt wire wound resistors all in parallel between 
two squares of fiberglass PC board.  The SWR was only about 1.2:1 on 15 
Meters and about 1.5:1 on 10 meters.   Admittedly, not a perfect load, but 
certainly adequate for the low bands just to soak up some RF.

73, Charlie k3ICH


>
> If you're going to use the paralleled metal film resistor construction 
> method, be sure to keep the resistor leads short and spaced them from each 
> other.  Lead inductance will start to become a factor on 6 m and up.  I 
> built mine with 40 2K 2W resistors and it works find at 100W if used 
> intermittently.  It's air cooled.  Don't know how much putting it in oil 
> would improve the dissipation.



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