[Milsurplus] [Boatanchors] IKW Dummy loads

[Sheldon Daitch]

Pete is right about water conduction dummy loads.

Several companies have manufactured soda-water dummy load
systems in the 250 kW and higher power levels, using a column of,
guess what, soda-water, really a salt solution, as the resistive element.

At those power levels, you have to circulate quite a bit of water through
the system and take the heat outside, but it is a very effective dummy load,
and with the proper instrumentation, a relatively accurate power measuring
system.

73
Sheldon

Pete Williams wrote:
> G'day all.... recent comment on HF  high power finals has me asking what do
> people use for 1 kW dummy loads--- without going the commercial, ready made
> way.
>
> Having a 1KW HF tx on the way, tuning up needs a load,-- I do have a
> reference in the Radio Handbook Eleventh Edn, page 383.-- Water conduction
> dummy load can be made for 1kW--- the recipe is  5 Gallons of water for 1kW
> with pieces of #10 copper wire inserted.
> Capacitive reactance may be tuned out using the antenna tuner.
> Any input and empirical evidence of what and how to absorb up to a  kW for
> short periods with 75 ohm impedance  welcomed.
> Any suggestions?
> Tks 
> Pete VK3IZ
>
>
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> B
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