This is a complete red herring ... within limits ELEMENT SPACING DOES NOT ENTER INTO EITHER GAIN OR F/B IF THE ELEMENTS ARE PROPERLY TUNED FOR THEIR POSITION IN THE ARRAY. It is an easy job to run a
ELEMENT SPACING DOES NOT ENTER INTO EITHER GAIN OR F/B IF THE ELEMENTS ARE PROPERLY TUNED FOR THEIR POSITION IN THE ARRAY?? Having done some antenna modeling, I find this statement difficult to belie
ORIGINAL MESSAGE: -- REPLY FOLLOWS -- The statement above was originally posted by W4TV and prefaced by "within limits". By removing "within limits" you have made it into an absolute statement instea
Gain does not double with as boom length doubles ... never did, never will. If it did a Hy-gain 105BA would have 3 dB more gain that a 204BA. The actual increase from doubling the boom length is in
If one were concerned about availability (in the MTBF/MTTR sense), one could, of course, just maintain a stock of spare parts.. Sure, there's an expense, but it depends what the availability is worth
Which figures? In general, decent NEC models of different antennas should be intercomparable. "decent" being the operative word.. it takes a fair amount of skill and work to generate good models, esp
Joe responded (actually shouted) this statement after I stated the following last Friday night when comparing the subject antennas: "The SteppIR, has no element interaction problems because the eleme
What's optimum? Is the deviation from whatever definition of "optimum" is chosen actually a significant (or even measureable) difference? _______________________________________________ _____________
Optimum for what? Gain, F/B, pattern? Who defines what is optimal? What he said is that you can overcome many of the issues with fixed element spacing if you have the ability to vary the element leng
The figures given by Optibeam on their homepage intercomparable. "decent" being the operative word.. It if there are tapered elements, traps, or lumped >components. The other thing that will definite
I'm a believer in modeling (A good part of my job depends on modeling), but not necessarily in model builders. And there's a key problem. Most of us don't operate antennas (particularly for HF) in an
I always felt the element spacing was ideal for most applications. It provides high front to back ratio on 20m where noise is often an issue and high gain on 10m where gain is generally more helpful
And I wouldn´t either! 73 SM2EKM _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.con
F/B,Gain and SWR are easily measurable. Obviously, since F/B and Gain don't both occur with the same element lengths and spacing, there is always a compromise, however there is an even bigger comprom
Try to convince Steve. Seems he is not a believing in antenna simulation. But I don´t believe in gain figures which are not measured in the main lobe Peter +++++++++++++++++++++++++++++++++++++
Tom launched the following into the ether: Well, I've never modeled an antenna that I have built and they all seem to work. I guess maybe if I bought a modeling program and ran it, I'd get a db or be
We are not talking about monobanders built on a specific sized boom. We are talking about multiband antennas. Which the C31 and SteppIR are. The reason the 10m F/B is much lower is because the driven
I don't disagree with most of what you've said about actually getting out there and building antennas. It's a huge part of the enjoyment I derive from this hobby. That being said, it's not easy to co
Sure it does, even 3db more or less will not be recognized on the air. Arguments here were about gain differences between similar antennas 73 Peter Don't know what the model says about it, but don't
ORIGINAL MESSAGE: -- REPLY FOLLOWS -- Would you recognize going from 1 db below the noise level to 2 db above it? I suspect every long-time DXer has had an experience where he almost but not quite ma