"I used a Rohde&Schwarz FSH8 portable Spectrum Analyzer using a short wire in the input connector center pin to pick up the signal from the antennas"
Using such a wire pick up will exaggerate the higher frequencies and not give a flat response. You need to use a resistive tap or power attenuator in order to obtain the correct measurement. A -40 dB resistive tap can be easily built from the article in June 2001 QST. The article is called "Simple RF Power Measurement" by Wes Hayward and available from the ARRL members section of their web site. Measurements on my own K3 (serial 80) give the worst case harmonic as -53 dB on 80m and less than I can measure on 14 MHz. These measurements were on a factory calibrated analyser using a 50 Ohm load. 73 Dave ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
