[Boatanchors] Soda Ash Water Dummy Loads

[Sheldon Daitch]

Dummy loads for higher power level transmitters, HF, 250 kW and
above, the load is a column of soda ash water, single column if an
unbalanced load, two columns, if a balanced load.

The impedance is a function of the soda ash content of the water
and the outer casing is tapered for better VSWR across the operating
range.

A Marconi B8057 is rated for 750kW, but that is the fully modulated
AM rating.  The dummy load really isn't that big, total the volume of two
large top door freezers, with the exception of the outside heat exchanger,
usually for this power, a five fan unit..

73
Sheldon
WA4MZZ




On 8/25/2012 6:00 PM, Drew P. wrote:
>   better.
> I like the idea of a big salt water dummy load - easy to build and cheap. A Google search turned up this link and many other references.
>
> http://www.deserthound.com/amateur-radio/rfdl01.html
>
> (Salt water dummy load text is at the bottom of the referenced page.)
>
>
> Drew
>
>
> Please help support this email list: http://www.qsl.net/donate.html