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 40-m

Vertical Radiation Pattern



Horizon Radiation Pattern





Comments: Antenna radiates mainly radio waves with horizontal polarization. A good pattern in the vertical plane. Antenna has strong zenith radiation that allows to do local QSOs. "Eight- figure" pattern in horizontal plane, so, it demands to choose a proper direction before an installation of the antenna. Antenna is fine for DX and local QSOs. Antenna has Z= 116+ j263-Ohms at 3800-kHz. Almost any ATU does good matching for such load.

Page 28


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 15:22

Antentop Home Page

Free Antentop Open Book