thanks for your reply. Yes, Kent's success is evidence that if I copied his yagi plans properly I should do well. I have used my built yagi to listen in on AO-91 and AO-92 (QSL attempts by others) as well as NOAA-18, 19 ( just signals). I noticed, by experiments, that I could pick up AO-92 with just my HT and it's rubber duck antenna better than with my yagi. Still learning......
On Sunday, February 16, 2020, Ev Tupis via AMSAT-BB amsat-bb@amsat.org wrote:
Hi Jackie, Same-plane antennas work nicely, as long as they are designed with that in mind. See multi-band same-plane yagi examples in the HF world. Kent is a skilled designer who both engineers *and* pretests before publication.
Simply interlacing antenna elements for different bands without taking into account their mutual interaction invites problems. Arrow gets around that by placing different bands in different planes.
Ev, W2EV
On Sunday, February 16, 2020, 7:08:34 AM EST, Jackie Dander viaAMSAT-BB amsat-bb@amsat.org wrote:
I built the combination dual band 2meter/70cm antenna found at WA5VJB's webpages. I chose the 5 elements on UHF forward and 2 elements on VHF rear. All elements are in the same plane. I now read elsewhere that in-same-plane uhf/vhf elements can interfere with each other. I visited the Arrow website and see their LEO antennas are opposing for uhf/vhf. My question is if i made a mistake building the uni-plane version? Why did WA5VJB has such success? _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb