BULLSHIT! N6BV;s HFTA terrain analysis software uses USGS terrain data to model the behavior of horizontally polarized antennas. It is DAMN GOOD! If you live in flatland, NEC is sufficient. If you ha
Jim, You're the audio expert, but didn't Bob Carver figure out some clever variable supply voltage tricks with his big Sunfire amps? I have two and my "Signature" stereo is rated 2 to 16 ohms (1250w/
There are young people that read this list to learn about abtennas and communications. And adults that expect this board to be profanity free. Please keep the language clean and professional. Best re
Icom PW1 73 Jim W7RY The fact that most (not all) SS Amps have Automatic Antenna Tuners just reinforces my statement. What QRO SS amps (1KW and above) have built in tuners? I've not found one yet. 73
On 10/26/13 11:17 PM, Jim Brown wrote: On 10/26/2013 10:57 PM, Grant Saviers wrote: You're the audio expert, but didn't Bob Carver figure out some clever variable supply voltage tricks with his big S
That's not necessarily the case.. if the amplifier has variable bias and drain voltages that adjust to what's needed for the match, you can optimize the efficiency at all powers. A simple design with
That's not necessarily the case.. if the amplifier has variable bias and drain voltages that adjust to what's needed for the match, you can optimize the efficiency at all powers. A simple design wit
is STILL better. The 1st 45 feet doesnt count. You need that just to clear junk + clutter in the surrounding neighbourhood. I won't dispute that. 35 ft up on 20m. Gee -- from your earlier post, to wh
Jerry Letvin would agree with you, he used the same term in a televised broadcast in the early 60's. The FCC did not react. 73, Dick, W1KSZ _______________________________________________ ___________
Take one of these 89 ft crank ups....and run it from 26 ft nested..up to 89 ft extended..and its a real eye opener. I have a slight uphill rise from N-S...all facing east. And slightly downhill....
Just having returned from our mini-dxpedition to Raivavae (Australs, French Polynesia) as TX5D I can confirm how loud or "only station on the band" big high antennas sound. e.g W6CCP was working Asia
Yes I have seem frequent times when my 50 ft high 10m yagi outperforms my 110 ft yagi. Usually the higher yagi is the best, but there are times when the signal is barley audible on the higher yagi, t
During the WPX SSB in the early 2000s.... 5/5/5/5 at 200 ft out of phase KT34XA at 65 ft A-3 at 40 ft Around 2000Z on 20 meters....the A-3 kicked the crap out of the other two to the NE. Higher is us
Yes I have seem frequent times when my 50 ft high 10m yagi outperforms my 110 ft yagi. 50 vs. 110 feet on 10 meters is really a special case. At 50' you're already 1.5 waves above ground - a level th
Richard, It isn't an issue of what you can get away with and not be prosecuted. The protest was based on civility and pedagogical considerations. The original protest was based on the protester's per
Anyone care to advise me regarding issues relating to the coax run up the tower in the case of a crank-up tilt over with a rotating antenna atop it? 1. How do you keep the coax tangle and jam free wh
the tower in the case of a crank-up tilt over with a rotating antenna atop it? rotates? Howdy -- There are 2 ways to do it: 1) tape all the cables coming down the mast together and leave 4-5 feet or
Have you looked at the Glenmartin Hazer? It's a carriage that runs up and down the outside of Rohn 25 like an elevator. You mount your rotator, mast, bearing and yagi on the carriage. Now you can win
Just curious, never used a Hazer, but, how do you deal with the guy wires ?? 73, Dick, W1KSZ _______________________________________________ _______________________________________________ TowerTalk
Install the top set of guys first before raising tower. Crank hazer up part way. Climb up and Install the lower set below the hazer. The unhook the upper set at the earth anchor and crank the hazer u