Recent content by wa1knx

sigma iv I haven't seen such controversy over an antenna design, but the signa iv/ nv 4000 etc should be good performers. how they work is spelled out in the beginning of this thread. that is, a sleeve antenna. in particular the 3 to 1 length of central monopole to the sleeves version...

electrical noise I'm in the same situation as you. heavy line noise, worked with the power co etc. some reduced but much still there. I just put up a maco, which is far quieter then a home brew GP I had. my problem is more on 80mtrs, where I have a 3el 1/4 wave vertical beam. 3 58' push up...

I just put up a maco clone, by workman (W58). With the help of this forum, mine tuned up w/o problems. I stuffed mine with wooden dowels for strength and guyed it 1/4 wave from the top with 3/32 dacron for more strength. (we get violent t-storms summers) 1:1.1 swr and plays great. you'll...

vehicle as boom Getting a parasitic beam to work isn't fussy, but you can't do it casually. reading up on them is worth it plus one needs some instruments. I do like the idea, as I almost put one together on my f-150 PU for 10mtrs - not an audi! - years back. For my old truck, if were...

multi tune, or beam You can feed a cpl antennas in phase, not for pattern gain. but a decrease in loading coil losses if the antennas are say shortened and a bit lossy. I've done this on 75mtr mobile with success. The arrl antenna handbook has this under multiple-tuned antennas. You...

meters, spurs Other things I have run into, is rf getting into the meter or wiring itself when running higher power. depends on the meter. and spurious frequencies when an amp is kicked in. ie parasitics or 2nd or other harmonics maybe present with an amp, that weren't present before. (And...

upward radials thanks DB. in the first two models (45up, 90horz) I see the higher angles pushed around a bit, some down and others up. I did find this looking at 5/8 antennas. but only one other site some time back, have I seen the upward radials. I havn't heard back from builder so I am...

5/8 with inverted radials This is a ham (9w2xan) that has a 5/8 with inverted radials. I have a note out to him with questions.. 9W2XAN: Bengkel Antenna 5/8 @ Astra @ Kaki Biawak scroll down to his bengkel antenna. I'm not sure of the dimensions, but it would be interesting to see a...

scaled antenna doc, he sure does have interesting antennas. I bet they would scale to 11mtrs. A pair of 5/8s would be like a 45' long antenna, but choking at the mast could work. ie using it as a mast and antenna. dean

choked mast I was looking for an 5/8 design I tripped over a while back that had 1/4 radials going upward around 45, (but not like the vector). I instead found an article "double 5/8 flower pot antenna" by vk2zoi. for 2mtrs, its choked off at the base and the author measured 3db+ over a...

edz I see where your heading shockwave. 5/8 under the 5/8 would be a extended double zepp. choked off, it could produce a few db maybe 3 over a half wave. perhaps that is how the 15 degree radial model performs well. Though most readings I've seen says its a difficult task to actually get...

radials Db, Very interesting work. I have always been under the impression that the currents in the radials of 5/8 antennas are out of phase with the upper 1/2 wave of the 5/8 radiator. so drooping radials makes it behave more like a long wire, pushing the radiation to the higher...

w58 tuned I have the workman up and running since my post. I read all I could on the maco/workman 5/8s in here. first thing I noticed was the coax so-239 is mounted upside down on the workman PO8P bracket. this puts the socket a cpl inches below the maco instructions. I set instructions aside...

sirio m400, cte tx hotrod, the cte version of a starduster at copper is a skylab t233. copper has reviews on that one. one review says you have to drill out the so-239 to fit a pl-259. not enough room to correctly fit the connector. Then I went to amazon and read the reviews of the sirio m400...

another m400 cte international has one at copper goes for $49.99 , m400 with another part number. anyone heard of this?