Re: Explain terms for Elecraft DL1 Power Calculation

Posted by Chip Stratton on Jan 22, 2012; 8:59pm
URL: http://elecraft.85.s1.nabble.com/Explain-terms-for-Elecraft-DL1-Power-Calculation-tp7213825p7214194.html

OK, thanks everyone for the education. This came up because I wanted to
build an RF detector to use with a multimeter as an RF field strength meter
to compare different ground/counterpoise schemes for HF on a boat.

I ended up copying the circuit for the MFJ-802 field strength meter, which
puts a load of 1 meg across a 1n270 diode bridge. Using a .3 volt drop
assumption for those diodes gives a very linear correlation of voltage
versus transmitted power in the near field. So the .15 volt assumption in
the dummy load calc was a puzzle to me.

AE5KA
Chip
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