Thanks for the EZNEC model John. Are the wires in your model sloping down or straight as a 45 degree slope would tend to make them appear a bit shorter?. Yes, it was assuming 45 deg slope, and all 0.
-- Original Message -- From: "Wolf Ostwald" DF2PY Subject: Topband: 3-el in line array/broadside I am in the process of setting up three verticals spaced ¼ wave in line and plan to feed with equal ph
I agree without your giving the site link it is difficult to comment objectively but to me sounds like questionable claims for a single wire so short. Certainly useless as a tx antenna and as a rx an
FYI John The National Grid, who distribute bulk electricity round the UK, have recently published proposals for miles of new 400KV overhead power lines associated with certain offshore wind farms, pl
I suggest you join both posts together, otherwise the reactance of the T1 secondary (hi-Z side of reverse direction xfmr) will be in series with the beverage if primary disconnected. Shorting or load
If you want a 3SK88 then a source in UK is Mode Components who are selling them for £1.60, plus carriage. modecomponents@yahoo.com 73 John. _______________________________________________ UR RST IS .
Something I have wondered about as well. Assuming a voltage is put on the transmission line one would have thought the reason is not just phasing. I have some ideas but pure speculation. Surely someo
Hi Carl, I cannot think of any reason why not, assuming lateral spacing is within normal beverage limits (20ft minimum ?). 73 John _______________________________________________ UR RST IS ... ... ..
For those who wish to build an ultrasonic detector (or in the absence of DX locate bats!) an article was published by ARRL in 2006 http://www.arrl.org/files/file/Technology/PLN/Ultrasonic_Pinpointer
Bud is right for a single wire beverage, where matching is not important, but dont expect to have a good f/back ratio with a 2-wire. However the gravel will help a little as it is non conductive, but
0.01 uF has approx 10 ohms reactance on lower end of 160m.. OK with single xfmr but may cause a little more loss or imbalance if used in all ports of hybrid and matching xfmr. 0.047uF might be bette
When I first went over to broadband a few years ago, only 10 watts on 160m used to make the ADSL2 lose connection, even with a wireless system. The house is fed with an overhead telephone line. Of co
reason why this takes place so I ran a separate 600 foot Beverage about 50 feet away and parallel to the two wire. The single wire works fine on 40 meters to the direction of the termination. A poss
outside usually means excessive loss. Im using WD-1A, WF-16/U, and 2 wire rural telephone cable which is copperweld. Listening on 40 a few minutes ago shows no particular loss but very sharp directiv
Jeff, EZNEC confirms what you and Neil have found. Modelling Neil G0JHC's antenna with 1000ft beverages at 12ft and 10ft, offset by 30ft length-wise, shows almost identical patterns to a single bever