Towertalk
[Top] [All Lists]

## Re: [TowerTalk] Half-Square formula?

 To: , "TowerTalk" Re: [TowerTalk] Half-Square formula? "w9ge" Sun, 7 Nov 2004 20:16:37 -0500
 If you are voltage feeding length is not critical. 468/f for top and 234/f for ends should be sufficient. You can tune it with the variable C. If you are current feeding it, then a bit more critical, but above is a good starting point, then trim to resonance. Voltage feed IMO is much easier and you can tweak it thruout the band. Half squares are very narrow band. Good luck. 73 bob de w9ge ----- Original Message ----- From: "Paul B. Peters, VE7AVV" To: "TowerTalk" Sent: Sunday, November 07, 2004 7:41 PM Subject: [TowerTalk] Half-Square formula? Over the past couple of weeks I have been researching the half-square antenna. While a combination of magazine articles and Internet-based information produces a significant amount of data and experiences with this antenna, the one thing that varies is the formula used for both the horizontal and vertical elements. For example, on LB Cebik's site http://www.cebik.com/scv4.html he suggests, "the relatively invariant relationship between the horizontal and vertical dimensions of the half square for a maximum-gain configuration tends to assure a good utility for the formulas". Where H is the horizontal length in feet, V is the vertical height in feet, and f is the frequency in MHz, he suggests the use of V=278/f MHz and H=447/f MHz. In other articles, the number for both H and V elements is either 468, 492 or 1005 and the half or quarter wave product of these calculations. Suffice to say, the base numbers produce some significant swings in the two values. While I tend to lean towards the LB Cebik material -- simply given the mass of research he has undertaken over the years, I am curious what the members of this group can offer in terms of opinions on the formula. My thanks in advance for any and all replies. ```73 de Paul, VE7AVV StoneyGround Station -|<*><*>||<*><*>||<*><*>||<*><*>||<*><*>||<*><*>||<*><*>||<*><*>|- "All email from this address is checked by Norton AntiVirus 2003"``` _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. ```_______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk``` _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. ```_______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk```
 Current Thread [TowerTalk] Half-Square formula?, Paul B. Peters, VE7AVV Re: [TowerTalk] Half-Square formula?, Jim Lux Re: [TowerTalk] Half-Square formula?, w9ge <=