H-Doublebay Calculator Program was built to calculate the H-Doublebay antenna that was in the September 1995 CQ magazine that was written by N4PC for 17 meters. The antenna has been used for HF, VHF and UHF and has recently been adapted by Ron AA4S for use in contesting for the Dixie Radio Pirates and The Carolina CX Amateur Radio Club for 10 meters, 6 meters, 2 meters and 440. Calculations were designed around 14 ga copper, but can also be used for 12 ga copper. Put in the center frequency of the band that you will be using and it will give you the width and ½ of the height dimensions. Language is in English and dimensions are in feet. 0.2.3 - added support email address and puchk routine to autocheck for newer versions.

H-Doublebay Calculator screenshots: