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

Building Antennas

Custom Search


ANTENTOP- 01- 2005, # 007

Building Antennas



Figure 3 Direct feed WHAS


Usually the antenna can be matched at most of amateur HF bands. For better work the WHAS install ferrite rings (5- 20 ring with any permeability) at two ends of the coaxial cable going from TX to ATU.




At my experimenters with WHAS I have used ATUs and ‘Artificial Ground’ described in reference [1].




1. Igor Grigorov. Antennas. Matching and Adjustment. – Moscow. RadioSoft, 2002. ISBN 5-93037- 087-7



Battery of Heating

Page 48


46 47 48



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 11, 2018 23:21

Antentop Home Page

Free Antentop Open Book