cover all of Europe without rotating them. I strongly disagree. My 6 element KLM array has a 3 dB beamwidth of about 54 degrees, which is plenty for Europe. K3LR, K9NS and W3LPL use even longer booms
Multiple comments below: WA3GIN: Subjective? Did you miss the RESULTS in my original reply? ;-) in CQ WW, ARRL DX and CQ WPX. Over 21 contests, my system has consistently beaten the average of the to
K5GO: to know whether you could possibly lose anything because of the narrow beamwidth, you would have to look at the 3 dB beamwidth of the one with X gain and then compare it to the 6 dB beamwidth o
K6ZZ: optimized design for a single yagi is not neccessarily the best design when planning to use a pair of them in a stack. True. First determine the stacking distance you want based on HFTA. Next m
YO7 disagrees with you. 4 directors might make sense on a 36' boom but not 27.5'. 73, Bill W4ZV _______________________________________________ _______________________________________________ TowerTa
What do you mean by "played better"? Here are the results of 4M iterations of YO7's model of a 6 element single driven element: 2-stack, 6 el on 27.5' boom, single DE (i.e. yours): Frequency 28.0 28.
W6TR: and make it into a 4 director antenna it would really play. could get more performance out of my KLM by eliminating the dual driven element in favor of a single driven element Bob we have a dif
The main feature 7.0 added was global optimization. This insures the simulator looks at all possible permutations and does not get stuck on a local optimization. K6STI published an article about this
Mag240N: 6.8 SF 16 ft Mast: 1.6 SF for 2 inch or 2.4 SF for 3 inch Rotator: 1 SF (approx) feet. In either case in a 100 MPH environment, this load exceeds the capacity of 45G and 55G. FWIW I had a 5
Correction to W3LPL's link to W8WWW's website: http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/HexArray/HexPhase.htm 73, Bill W4ZV Mike, Thanks for your excellent clarification
When I built our house 12 years ago I had the the following installed by our power company: http://www.edcosurge.com/products/telecom/emc240B.asp No problems and LED's still green even with numerous
temporary guying allowed the pier pin to slip off the base and he rode it down. "allowed the pier pin to slip off the base" ???? Surely not. The last (and only) time I used a pier pin I recall it wa
KE4VYN: would like some professional input in case I missed something. The best advice I can give you is to scrap the idea of a dipole for 160 and consider an inverted-L, even if you can only get the
K4SAV: measurements is usually because of some error I put into the model or something I left out of the model. However I can't do comparisons of high dipoles and verticals on 160 at my station becau
K0RC: Someone said 3" or 4". I was expecting something larger like 6" to 12". That's what you usually see when fabricated from X braces. Yes it did: http://www.rlham.com/cgi-bin/shop/modellookup.dbw?
Anyone have one of these they're not using? If so please email direct (off-list). 73, Bill W4ZV _______________________________________________ _______________________________________________ TowerTa
Anyone have one of these they're not using? If so please email direct (off-list). 73, Bill W4ZV _______________________________________________ _______________________________________________ TowerTa
K9YC: near the base of the antenna, so copper near the tower is more important than copper at a distance in reducing I squared R losses. This is why AM broadcast stations often use a heavy copper scr
you are well advised to use real copper which will last forever (but I hate to think what that might cost). A 3' X 100' (300 sq ft) roll costs only $1,683, so I assume a 20' X 20' square screen (400
Oops, the 40' X 40' screen Jim mentioned is 1600 sq ft, making the total cost $8,976. For $1.5k I could build a complete 4-square with 60 each 130' radials (~6 miles using 3 one mile rolls of twin WD