I have a rough computer model for ELNEC of the T-10 that I threw together to check its theoretical vs real performance before I bought one. The computer model data was quite close to the numbers I go
I have the manual for my Wilson ST-77B. Nowhere in the manual does it tell you how far into the top section you can insert a mast. The top section on this tower is simply a tube with a cap on the bo
WHAT COLORS? When using non-metallic cable (NMC), such as Romex(tm), for 110/115/117 VAC circuits, use black=hot, white=neutral, green/bare=ground. GROUND = NEUTRAL? The ground wire and neutral wire
rotate, more than 25-30 degrees. I had similar problems with both the 800 and 1000 turning over a limited range. Turns out it was my fault. Too lazy (and too rushed) to drill the correct metric bolt
WD-40 is flammable and should not be used in conjunction with an open flame or spark. (I often use WD-40 as starting fluid in cold weather.) When combining heat + penetrating lubricant, use non-flam
It seems intuitively that if this were true, you'd never hear anything when you switch to RCV. Recipricocity must apply in both directions. It's been a while since I designed a tube rig, but I'm pre
Whoops. Guess what? My Wilson tubular tower manufacturer's instructions clearly specify a guying system (complete with slip ring for the rotating tower) that greatly increases the advertised wind loa
Can't help but throw in my two cents here... With the utmost respect to Press (who knows his cable), the idea that "all the power goes to the antenna eventually" is one of the most persistent and pe
Here's some other good reasons. 1. The first (and last) time I considered using a crane to remove antennas and dismantle a tower, the truck driver drove up, looked at the field, and said, "I CAN'T DR
breaking a pileup and up comes a wind. The tower starts its decent and suddenly you dont hear the rare one any more. Of course you can have a bypass for that circuit but you have just one more thing
Matt -- Are you confusing the plane of revolution with the axis of revolution? The axis of revolution is coincident with and (hopefully) concentric with the mast. Same for the thrust bearing. The ax
I think you are mistaken, Anthony. Tennadyne sells their T-10 HF log as having a 50-ohm nominal impendance suitable for direct feed with 50-ohm coax. They suggest the usual 10-turn coax balun as an R
At least two up here. I have nearly the same situation you describe. 50' of 25G bracketed to the house. Base is 4 ft in the ground, buried in 1.5-inch crushed stone. No guys installed -- none needed
One bracket about 3 feet below the peak of the roof (where the extension of both tower sides project onto the house). I used stock angle iron and U-bolts. Inside, 2x10 backing plate tied via cable t
to the needed. Base to bracket: 30 ft Above bracket: 10ft flat-top section. Above flattop: 10ft mast w/tribander Rotor (CDR-22) about 2ft below flattop One leg of dipole at 38ft. Base is 3-4ft below
I have to clear up these misconceptions. All hams should be aware of the draconian anti-tower laws pervasive here in New Hampshire. Even visible runs of coax are outlawed and violators are punished s
Sure. I have for 5 years. Wilson tubular crank-up with with Tennadyne 10-el at72' and 40-2CD 8' above that. Turned the whole thing with an AR-22 for 3 years with no problems. Then switched to a G-80
After reading Ed's story about his injury and other's comments, I want to offer this unsolicited advice. I'm a firefighter/emt, and professional rescue in dangerous situations is part of my everyday
My simple and effective solution for securing the threaded j-bolts for use with my self-supporting tower: 1. Make TWO identical templates. 2. Buy extra nuts. 3. Attach the first template with a nut
Normal concrete is a 2000-lb mix that hardens to about 50% within 7 days and 95% after 30 days. This can be a problem. I like doing things at the last minute -- including pouring free-standing bases