antentopSince2 July

Ham Spirit
Free Choice



Free Antentop Amateur Open Book
Antentop Album
Antentop Survey




Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an

Special page devoted to

Shunt Vertical Universal HF Antenna

Custom Search


ANTENTOP- 02- 2004, # 006

Field Universal HF Antenna RV3DA


Antenna RV3DA at 17-m

Vertical Radiation Pattern



Horizon Radiation Pattern





Comments: Antenna has both, a strong vertical and strong horizon radiation. For the vertical radiation antenna has a good pattern in the vertical plane, and almost circular pattern in the horizon plane. Pattern for horizon radiation is not so good as to vertical polarization. Antenna can provide DX QSOs at vertical and horizon radiation. Antenna has impedance 1711+j466-Ohms at 18220-kHz. Not all ATUs do good matching for such load.

Page 31


24 25 26 27 28 29 30 31 32 33 34 35




QRP Transceivers and PA from Accessible Parts IP for QRP Antentop Book Radio Antenna Engineering Book Antentop Printed and e- magazines



Just for Fun:

Map IP Address

Thanks for your time!

Last Updated:

February 23, 2020 15:24

Antentop Home Page

Free Antentop Open Book