I wrote "HBDX". Should be HDBX. The "HD" standing for heavy duty. There were BX, HBX, and HDBX models, with varying ratings, appropriately, all with the 10' boom rating. As Steve says, working on one
"I've been looking at a C19XR/C31XR, TH7/TH11, or possibly a Steppir. All seem to have waiting times of 1-4 months. Does anybody even manufacture the products they claim to make?" I regret to report
Folks, this is NOT an NVIS antenna. The dipoles are at .4 wavelength height. That's the equivalent of 80m dipoles @ 32m or about 100'. What it IS, is a controlled vertical angle radiation antenna. Th
This topic has drifted off the original frustration-rant. Still, it produced both possible solutions for the original poster, and some intelligent comment on amateur business and manufacturing, in ge
To this day I doubt if any multiband yagi is as good as monobanders on equal boom lengths. Something is missing with the computer analysis in the losses, interaction or both. Carl KM1H -0- I think th
Ok guys, time for a new thread. This was a new one on me. <snip> This morning as I was walking out the driveway, I heard a metallic "rattle" of sorts like I'd never heard. <snip> I looked up the towe
TT: Have privately commented to AD1L that I would go to the middle tap, to start. The 240v tap is the most aggressive, resulting in the highest Ep & Eg. While this isn't relevant to antennas, the dis
I'll appologize up front, as this thread is slightly off-topic w/resp. to towers/antennas. EXCEPT for handling and interpreting data from relative measurements...there it IS relevant, and may be help
Just a quick note of thanks to k9yc for his white paper on rfi and chokes. And to km9m for repeating the URL for easy consumption. I repeat it again, for those who missed it: http://audiosystemsgroup
Some years ago I saw a study done by Bell Labs or RCA or similar in the 1930's or so in a broadcast engineering handbook that showed some help even a mile or so away depending on the frequency. I wis
< snip > k6gt questioned: Hmmm. I was under the impression that "Teflon" IS "PTFE". I thought that Teflon was DuPont's trade name for PolyTetraFluoroEthylene. <snip> quoth wikipedia: Polytetrafluoroe
This appears to be a rohn 20. It is a light duty tower intended to hold up TV antennas. It seems to be holding a scanner antenna, a tv antenna or UHF corner reflector, an anemometer, and on top there
I need to be able to effectively and safely improvise a way to mount my Rohn 25 tower sections two regular 10' sections one top section 9.5' to the ground. Does anyone have any ideas other than buyin
Jim Brown added: Seems to me that a tower located 200' from the house is a different animal than one attached to the house. In the latter case, the answer is clear. But for the distant tower, shouldn
TT: The idea of using non-galvanized metal as a bracket system isn't very appealing. Wood can be painted to match the house, and spreads the loads to prevent siding damage. I have routinely made my h
Just moved to Amherst, MA and looking for anyone who may be in the same local...like east of the CONN River.... Seems the city has a 35 foot limit on towers and according to their zoning laws which I
When I was in college, I had a 70' pushup system, which consisted of a 50' steel radio shack tv mast, with 20' of 1.25" tv mast above that. The top guys were crossed inv. vees on 40m, fed with a balu
TT: This is a planning/brainstorming question, with a time-horizon of 12-14 months. Sometime next Summer, if things go as anticipated. This is an antenna question, not tower. The question is a single
Dennis, Aircraft types would call it a 'trim tab'.... If you look at the Bencher Skyhawk's, they have one, to balance out the windload around the mast-axis. If your manufacturer doesn't provide instr
Gregg... Take a look at the mil surplus AB621, at Ontario Surplus. You might find the "pushup and assemble as you go" technique interesting. I was able to put a CC 402CD and a 20-10 log at 70 & 90',