[Elecraft] Dumb(?) dummy load question

[Mike WA8BXN]

I think those are the wire wound resistors - read that as coil, inductance.
They will be useful as a dummy load only at audio frequencies. The better
way is to get a number of non-inductive resistors and put them in parallel -
20 1K resistors would be 50 ohms, if you use 1/2 watt resistors that would
give you about 10 watts. Such a dummy load will not be prefect, but much
better than a single wire wound resistor! 
73/72 - Mike WA8BXN