Hardy: What you say is perfectly true, but only for a particular case. A lot of texts say that because that's what appeared in Beverage's original AIEE paper. Beverage was concerned only with LF sign
Ford: First of all, I think ON4UN's values should be treated as approximations. The formulas he uses are simplified formulas for wires over pefect ground. There's quite a difference when the more dem
Kelley: There's so much difference in the currebt versus resistance curves of various vactrols that I really couldn't tell you what's right for your Vactrol. I've found data sheets for all the Vactro
Assuming you didn't transmit into it, it's almost impossible to saturate a ferrite toroid. Also, I don't see how saturation would cause the antenna to stop working, assuming "not working" means "no s
Could you tell us what "not impressed with the performance" means? Did you lose a few dB's via loss and have a non-too-sensitive radio that couldn't dig things out? Did you feel that the nulls were s
Logan: These cores are binoculars so there really isn't an opposite side. Check out http://www.w8ji.com/core_selection.htm and scroll down to the bottom and you'll see a picture of a transformer woun
It will be awhile before I have the automated Beverage raising & lowering equipment ready to test this myself.... Chuck John said: I believe the advantage you are seeing with a low beverage is the re
It is an excellent article. After reading it, you know exactly what the writers did to test and make assumptions. Also, the testing was pretty complete. All I can add to the article is a bit of an ex
Mike: When I compare your plots to those from Fair-Rite ( http://www.fair-rite.com/fr_catalog-14thed_rev3.pdf , page 173, Figure 4), the difference is quite notable. Fair-Rite shows that the impedanc
Yes, different sizes of the same mix have different properties and some of the Amidon charts show that clearly with overlaid data so there's no surprise there. But that wasn't really intended to be m
Mike: Here's a couple of studies of termination resistance versus null depth done with pennant and squashed delta antennas: http://members.aol.com/DXerCapeCod/pennant.pdf http://members.aol.com/DXerC
OM Ken & fellow Topbanders, I would not sell a 480 foot Beverage short. They work. Especially if covered with plastic insulation, the velocity factor is close to 10 percent vs. 5 percent for bare or
The original poster didn't say what kind of antenna he was speaking of so I feel obligated to point out Beverages, other travelling wave antennas, EWE's, etc need a ground connection to work well. C
Pete: All is true except for the kit availability part - Tony usually posts weekly updates about availability and shipping in the Yahoo Softrock group. And to double emphasize Tony's work: he has be
I've always wondered how much effect Bentonite would have and assumed the Bentonite's "local" influence doesn't help much. On the other hand, it gets tiring to carry buckets of sea water up a hill to
I feed my normal Beverages with 320' of RG-58. and sometimes (at other locations) feed a Beverage with a shorter cable. Never ever have I been able to pull the antenna from the transformer between an
Here's a Wullenweber that is intact and I believe functional although not used like it was. It's coordinates are 54.028911,-132.065256 and it is quite visible in Google Maps. Of course it belongs to
Very little. The exact answer depends on whether your sandy soil is dry or wet. The exact values are: dry sandy soil : 1.8 MHZ 165 feet (!) and 3.6 MHZ 118 feet wet sandy soil : 1.8 MHZ 12 feet and 3
I'm quite happy with the test results for Laird #35 toroids. The price is much less that Fair Rite for a comparable part. From my point of view, there's no need to stick with IBM, GM, etc. Chuck ____
Google is your friend: http://www.newark.com/fair-rite/2873000202/aperture-oblong-dual-core-ferrite/dp/02E8908 Chuck _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw