This might be the wrong forum but does anyone remember an article in QST (or maybe QEX) of how to make multibands antennas using LC traps where the traps resonance frequency is not at the operating f
It was Ham Radio Designing Trap Antennas: A New Approach Yardly Beers W0JF Ham Radio, Aug. 1987, Vol. 20, #8, P. 60 I have the issue someplace but could not put my hands on it. Just found it! If you
I have some concerns about this article. I had gone through it several times and tried to contact Yardley since he and I had spoken about other thing before. Regrettably, he had reached the point whe
Reg, G4FGQ, has a program to do this on his website. Look for: NOTATRAP 73, Roger If anyone has time to check the equations and verify that they are correct, I for one would like to be advised. It wo
Hans - Try: "Designing Trap Antennas: A New Approach" by Yardley Beers W0JF Ham Radio August 1987" He also had a couple of articles in QEX. A search on the ARRL periodical index should lead you to th
That should be trap resonant frequency = SQRT(flow*fhigh), not trap = sort(floe*fhigh). I didn't check the autocorrect. Sorry - Duffey KK6MC -- KK6MC James Duffey Cedar Crest NM _____________________
I have a copy of the Yardley article. I was trying the concept to work up a 80/30 trap dipole but found that being too close to the third harmonic it was impossible for me to get both the 80m and 30m
Hi Bob , and all, I have now located the HR 1987 issue at http://www.amforever.com/viewtopic.php?f=4&t=54 Ham Radio Magazine 1987 Download If you need addtional help, let me know and or I can send th