Re: Topband: Length of 'T' Top Hat wires?

2012-12-14 Thread Rick Karlquist
Joe Subich, W4TV wrote: Is there any theory to the 25% rule? The 25% rule says the ends of the top hat wires should not extend more than 25% down the vertical. The thought is that the wires shield the main vertical ... that the currents on the top hat wires cause cancellation. Once the

Re: Topband: Length of 'T' Top Hat wires?

2012-12-13 Thread Richard (Rick) Karlquist
On 12/13/2012 8:37 PM, Ray Benny wrote: I have a 67 ft base coil fed vertical, 4, 3 2 irrigation pipe with two 50 ft top hat wires that I use on 160m. I have about 100 - 135 ft radials on the ground. So far I have been pleased with it. On a 60 foot vertical, I need two 75 foot wires to

Re: Topband: Length of 'T' Top Hat wires?

2012-12-13 Thread Joe Subich, W4TV
If I mis-interpreted the rule, I like to know what it means. Many times the top hat wires are not horizontal but come down at an angle like the top set of guy wires on a tower or vertical. Is there any theory to the 25% rule? The 25% rule says the ends of the top hat wires should not extend