It's almost impossible to predict such interactions. f/b ratio is the most sensitive measure of interaction. Measure the f/b on the a3. If f/b is degraded, try lengthening or shortening the dipole's
I thought he said he would be using guys. In that case the cb-1 base is 2x2x4deep = 16 cu ft = 24 bags ready mix. Dave Hachadorian, K6LL Big Bear Lake, CA . __________________________________________
-- See also eight pages of pictures and info here: http://www.waniewski.de/id330.htm As near as I can tell, this array is used at night for religious broadcasting throughout central Europe at 300 kW
I never purchased that antenna comparison report, because they called my kid ugly! (KT-34XA) Dave Hachadorian, K6LL Big Bear Lake, CA _______________________________________________ _________________
Some new features have been added to Google Maps (not to be confused with Google Earth). Some of the ones relevent to towertalk are Path Profiler, Position Finder, and even Real Estate Search. There
-- I'v had very good luck with all kinds of special cables and adapters from the following source. They are very reasonably priced. www.monoprice.com Dave Hachadorian, K6LL Big Bear Lake, CA . ______
This mast calculator should do the job for you: http://www.math.niu.edu/KARC/mast/ Dave Hachadorian, K6LL Yuma, AZ . _______________________________________________ __________________________________
-- Try using a conventional (higher power) swr bridge. I've had many instances here where analyzers are thrown off on the low bands by rf from an AM broadcast station. Dave Hachadorian, K6LL Yuma, AZ
With the dual driven design, the XA is very flat on all bands. I just looked at my XA on 15 on the swr meter and it is less than 1.2 across the band, with the traditional double minimum in the curve.
If one has a bandpass filter such as Dunestar or ICE and switch it in for rx and out for tx, is that good enough or is there really a filtering advantage of transmitting through the filter when nearb
-- Google KT34a. Click on "images" at the top, above the Google logo. Dave Hachadorian, K6LL Yuma, AZ . _______________________________________________ _______________________________________________
Below are some hints from one of my past towertalk postings. Dave Hachadorian, K6LL Yuma, AZ -- 2. Using an ohmmeter, measure the dc resistance from the outer shell of the 10 meter capacitor to the o
-- Sounds great to me, but it would be a shame to break up the stack just to feed the second radio on 10, 15, and 20. Another tribander in there would be great for the second radio, something like a
Whatever combination of yagis that you finally put up, the most sensitive test of interaction is f/b ratio of each yagi. f/b is easy to measure: 1. Have a local ham friend 500 meters or more away tra
-- Brake winches require a certain minimum tension in order to work properly, or the handle will just unscrew. Try adding to the cable tension by pulling sideways on it. If you have any ropes hanging
What you are describing is a perfect application for a dip meter. It should work fb. The quad loop must be continuous, with no insulators. The small loop that you formed must not be shorted upon itse
Yes. That's the problem. Remove the feedline and put a temporary jumper across the insulator, and you will read the resonant frequency of the loop. You could build your little coupling loop into this
Before you bring it down, try a real swr bridge/transmitter. Sometimes those analyzers get fooled by stray rf. The XM-240 has a matching network? My 40-2CD has just a split dipole with no matching ne
-- Steve, analyzers, especially on physically large antennas. I recommend trying a real swr bridge as your next move. Dave Hachadorian, K6LL Yuma, AZ . _______________________________________________
The problem with replacing a rotator in a crankup is that you have to almost totally remove the mast to make room to get the rotator out the top of the top section. I helped a friend do that once wit