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Author Topic: Let's talk about dummy loads for HF  (Read 17238 times)
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K1JJ
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"Let's go kayaking, Tommy!" - Yaz


« Reply #25 on: December 17, 2006, 03:52:35 PM »

Charles,

Congrats on a very nice use of junk box parts, OM!

Most would think the wire wounds wouldn't work, but you solved it with the variable cap for the higher freqs.  The fan is a good idea too.

I once made a dummy load using (24) 100W lightbulbs.  It required an L/C network and changed impedance the first few seconds as the bulbs warmed up... Grin

Yes, a network to match/tune out the reactance, it is a great idea.

73,
T
Logged

Use an "AM Courtesy Filter" to limit transmit audio bandwidth  +-4.5 KHz, +-6.0 KHz or +-8.0 KHz when needed.  Easily done in DSP.

Wise Words : "I'm as old as I've ever been... and I'm as young as I'll ever be."

There's nothing like an old dog.
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