This tool calculates the antenna capacitance and radiation resistance of small vertical monopoles at 475 kHz. It is by no means a replacement for antenna design software such as EZNEC, but should give a clue how the antenna will perform.
Following limitations apply:
- Total dimension (H+L) less than 15% of the wavelength (= less than 95 m)
- Wire or small tube construction (less than 2.5 cm)
- The calculations assume an unobstructed antenna. Object near or under the antenna will reduce the radiation resistance and increase the antenna capacitance.
Visit the Calculator in 472kHz.org
More
INTERNATIONAL SPACE STATION SSTV EVENT ON APRIL 11 – 14
” The next big event will be the ARISS SSTV event that starts Thursday, April 11 about 18:00 UTC and will be operational until about 18:00 UTC o... Read more
Hambuilder HBR4HF 4 Band HF Transceiver
HBR4HF specification Heterodyne 10MHz Xtal filter exciter based on Hambuilder BritX exciter 300-25000Hz audio band pass active filter using NE5532 4 B... Read more
Palstar SP30H
The Palstar SP30H ultimate communications speaker is a custom engineered speaker designed to match the sonic characteristics of the human voice. The... Read more
