At 04:31 PM 2/3/2007 +0000, w7lrd@comcast.net wrote:

Tyler-Think about a 10 meter full wavelength loop inside 1/2 inch pvc

laying on your roof. I used one for many years on rs10 and 15. A little more gain and less directive than a dipole. The length will be 1005/F(mhz)

73 Bob W7LRD Seattle

-------------- Original message -------------- From: "Tyler Harpster" tyler881@adelphia.net

...

I just bought a 10 meter preamp from Advanced Receiver Research. I was planning on making a 10 meter dipole and feeding the voltage supply for

the

...

mast mounted preamp up the coax. Will this be enough to hear the bird?

Bob,

I guess the height of the horizontal loop works well for a NIV antenna (beaming high angles). I have thoughts of putting up a 10m J-Pole using a ten foot tower section as the base and extending with 1-Inch aluminum tubing for the required length (3/4 wavelength total). This will likely provide lower radiation angles (which is desirable for DX). The J-pole does not require a ground plane so hoping this will work well. A J-Pole works well using a flagpole as a stealth antenna - just use the top section length as required at the operating freq.

Tyler,

My experience with ARR preamps is with models not set up for coax line powering. If you are uncertain, you might check on this. To use coax line power with a preamp not providing the required circuitry one must add T-bias units on both ends of the coax (unless your radio has the capability of powering an external preamp). 73's, Ed - KL7UW ========================================= BP40iq, Nikiski, AK http://www.qsl.net/al7eb Amsat #3212 Modes: V - U - L - S USA Rep. for Dubus Magazine: dubususa@hotmail.com =========================================