[TowerTalk] WTB: GAP VOYAGER and a Zero Five

[RICHARD SOLOMON]

That takes care of my idea to put one up for 160 !!
 
You guys just saved me a bucket of money, guess I'll use it to fill the
tank instead.
 
73, Dick, W1KSZ



> Date: Fri, 9 May 2008 17:57:17 -0500> From: RadioIR at charter.net> To: towertalk at contesting.com> Subject: Re: [TowerTalk] WTB: GAP VOYAGER and a Zero Five> > Here is an EZNEC simulation of the gain of a Zero Five using 32, 100 ft > radials, average ground, and 100 ft of RG213, also including a 4 to 1 > balun at the feedpoint as recommended by Zero Five and assuming no balun > loss. The gain numbers are all at 15 degrees elevation, regardless of > what the take-off angle is. The last number is the amount of power > dissipated in the coax assuming an input of 1500 watts.> > 1.8 MHz -17.5 dBi, 1292 watts> 3.5 MHz -8.1 dBi, 598 watts> 7 MHz -3 dBi, 226 watts> 10.1 MHz -1.7 dBi, 532 watts> 14 MHz -3.3 dBi, 585 watts> 18.1 MHz -4.3 dBi, 306 watts> 21 MHz -3.1 dBi, 448 watts> 24.9 MHz -6.9 dBi, 674 watts> 28 MHz -12.2 dBi, 362 watts> > Here are the gain numbers for the same set-up except no 4 to 1 balun:> 1.8 MHz -22.2 dBi> 3.5 MHz -10 dBi> 7 MHz -3.6 dBi> 10.1 MHz -4.8 dBi> 14 MHz -5.5 dBI> 18.1 MHz -5.2 dBi> 21 MHz -5.6 dBi> 24.9 MHz -9.6 dBi> 28 MHz -12.4 dBi> > This is really comparing apples and oranges, but just for reference, > here is the gain of a half wave dipole (one on each band) at 43 feet > using 100 ft of RG213. The gain is at 15 degrees elevation regardless > of what the take-off angle is, and the gain is broadside to the dipole.> > 1.8 MHz -5.9 dBi> 3.5 MHz -3.2 dBi> 7 MHz 0.15 dBi> 10.1 MHz 3.3 dBi> 14 MHz 5.9 dBI> 18.1 MHz 6 dBi> 21 MHz 6.3 dBi> 24.9 MHz 6.6 dBi> 28 MHz 5.6 dBi> > Jerry, K4SAV> > > _______________________________________________> > > > _______________________________________________> TowerTalk mailing list> TowerTalk at contesting.com> http://lists.contesting.com/mailman/listinfo/towertalk