I guess we have to define "dead band"! NM7M used the phrase "socialogical factor" to describe the situation whereby the ionosphere is in good shape but nobody is there because they are asleep or act
I agree with Tree. I think the reflector is fine the way it is. Any question gets lots of response. Bob VE7BS _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
I used lots of BOGs (but only for 160) and found that Harold Beverage's advice (for normal Beverages) recommending a few short radials laid on the grouind and symmetrical, applied to the BOGs too, e
Jorge This is normally called the "Lazy U", and there is lots of information on it under that name. It works very well cut for 160 only and it is omnidirectional and vertically polarized. The bottom
Hi Rick It depends what you mean by "really short". Some consider a half wave to be really short. Beverage Rice and Kellogg original AIEE paper showed that there is not much difference in the pattern
There must be something special about those ABC broadcasting stations on 2310 and 2325 kHz. This morning around sunrise, finding absolutely no signals on 1.8, I went to see whether there was anything
1. It could be a convenient accident. 2. If on purpose, the answer is probably "Just in case this is useful". But then you would expect DXE to draw attention to it . 3. Useful that this has been "dis
Hi Jim Twenty years or so ago NM7M wrote a program in DOS that predicted the position of the "tilt" in the E layer on the dark side of the terminator, more than usual refraction at that point causing
Hi Barry I, for one, have not found it boring. I don't believe we now know all there is to know, and text does not take much file space. Some just tune up and work 'em and some are more interested in
That's dangerous! Several years ago, intending to build a physical resonator audio filter with speakers at each end of a tube, I saw a 12 yrs old Bowmore Islay Whisky on the Liquor Board shelf in a
Bill I don't know how it is in W4 and/or W2, but here in 7-land the "season" is not over, although if people think it is it often appears to be. For trans-Pacific paths the prop is better from May to
Hi Herb, Niko: Of course it is too long. Beverage said that when it is too long there are so many lobes (and therefore nulls) that it is 50-50 that a given direction will not be covered; that velocit
Hi Jim Many years ago at 4U1ITU I found the Bird 43 grossly underestimated the power output on 160, rather embarrassing at the temple of regulation. Bob VE7BS ________________________________________
Thank you everybody for interesting and useful info on the Bird 43. If I remember rightly, the power limit in Europe was 10W, and I don't remember which slug was in use. 5% of FSD may have produced a
the wall were coax shielded ? That's a VERY interesting thought. Somebody model it please. Bob VE7BS _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
Tom: MOST antennas are in a "neither" world of being neither perfectly balanced nor perfectly unbalanced. How about an inverted L longer than 1/4 wave but optimized with series capacitor? Any closer
Next year Im planning to try a couple of Slinky Beverages again in order to get a 2-3 wave electrical equivalent for particular paths and narrow the beamwidth to get rid of EU "noise". Carl KM1H Come
Thank you Mike. I did not know of the velocity factor parameters when I made my practical experiments many years ago, and gave up when I ran into anti-phasing and excessive broadening of the lobe. I
I did speak to Lee at Hi-Z yesterday and he warned me about substandard quality F double females. He has had terrible problems with them. In what respect are they "sub-standard"? What kind of problem