<< There is freeware available for designing coaxial traps. I tested it on several traps, and it is pretty close. The only error it makes is it considers the capacitance in pF per foot! That means it
<< 1. Apply two wraps of premium electrical tape (Scotch 33+ or 88). 2. Apply a layer of vapor-wrap material. Vapor-wrap is simply a butyl rubber material that comes in rolls or sheets and does an ex
How about 1/4 wave slopers (so called half slopers)? I used them on 160-40M and was very satisfied. Did anyone test it more seriously or compare to 1/4 wave verticals? Danny T93M List Sponsored by AN
I wonder what happened with experiments by Force 12 with verticals near salt water? Excellent article in CQ contest 3/98 and website of K2KW but no any info after that. Could anyone shed some light o
XM240 has best F/B ratio of 21 dB at apx. 120 kHz below lowest VSWR point. Of course it's over very narrow bandwith.Shortned Yagi exhibit higher values of F/B than full size but as well as secrifice
FYI R7,R8 and other similar verticals from Hygain and MFJ are actually half wave vertical radiators. Those 47 inches "radials" are not radials at all, they are just another 1/8 of center fed vertical
YES, as I said PA4AO did the testing with his GP for 20M and R6000. It's on the air and S-meter measurement. It is very clear to understand why R6000 outperformed 1/4 vertical with 3 elevated radials
<< Hi Danny: Your comments regarding the CC verticals are appreciated by the group -- Just curious, are you still an employee of CC? It seems we met at Dayton about two years ago and briefly discusse
<< Danny: How do you think the R6000 or R8 would perform over a steel roof. The base of the antenna would be about 2 to 3 feet above the roof. It's too low and antenna would not match. Probably will
I found very interesting the fact that current on main driven element tends to drop to zero at the points where tips of coupled element are parallel to main element. That makes me believe that in som
Hi Brian... So far I believe no one burned loading coils on 40-2cd . I wonder, have you ever opened any other balun to compare the size of wire or coaxial cable inside of it? If you did tell us a dif
XX, I have to admit that I am not familiar with proper things here in USA so please forgive me this mistake. I am not too old to change ... but will keep my right to be a Ham after 5 PM and comment a
Guys, Thanks... I saw the light....!!! It tooks me 20 years to realize next: 1. my MFJ 989 (3Kw) tuner melted because warranty expired!!!??? 2. While I was using SB220 with VSWR of 2.5:1 on the TX en
Hi Tom, ALL YOU say Is correct "BUT" , Please finish with explanation of Conjugate Matching theorem (siplyfied) and give us more light on how it's realy work and why...most of us are geting tired to
HI Dennis, Thank you for kind note and giving me a chance to say next: 1.I realy find some discussions funny so I can not resist... 2.I realy learned a lot from all discussions ... 3.Cushcraft is com