[Antennas] re: building a dummy load

[Adam Farson]

Hi Hart,

No, a light bulb is not suitable for use as a dummy load, as its resistance
is not constant.

Tungsten-filament incandescent lamps exhibit a very-high positive
temperature coefficient of resistance, with the cold filament
resistance being approximately 10% of the hot filament resistance.

http://www.allegromicro.com/techpub2/an/an295012.pdf

You should be able to locate a used Heathkit Cantenna (or equivalent) on the
swap lists, or you can build up a dummy load out of carbon-film or
metal-oxide (not wire-wound) resistors in parallel.

Cheers for now, 73,
Adam VA7OJ/AB4OJ