<< This antenna can NOT be tuned on the tower - it needs 100 feet of feedline per the manual to make the curves look good. The antenna was mounted about six feet below a CC A3WS and twelve feet below
Hi Pete... I have watched with amusement as Tom pushes his designs that claim that every interlaced element is adding to the forward gain, whether that element is resonant in that band or not... He i
Forget the antennas on top.... Remember the old "Lincoln Hat" antenna? (Naaa, probably don't) Anyway, I would try to have the tanks spaced so that they form curtain array, gamma match em, and fire aw
Hmmm, one might read Moxon's treatise on HF Antennas For All Locations... In one chapter he describes measuring the losses of 150 yards of bits and pieces of open wire line fed and terminated by a pa
<< I think we got 'em covered now..... >> Umm, you missed "any antenna is better than no antennas".... -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com
<< Another idea, although I have no idea where you might find them are "static wicks" >> "Aircraft Spruce" @ 1-800-831-2949 Denny PS: Join the EAA -- FAQ on WWW: http://www.contesting.com/towertalkfa
I have commented on this before... Manyfacturers and their marketing managers undestand this phenomenon and capitalize on it... Here we have a half wave height difference, in favor of the new antenna
Also, I hit send too fast on the previous message.. Take the beverage box off the line and just use a matching transformer and you will see increased s/n ratio... I have found that preamplifiers seem
<< and that HIS experimentation has concluded that Beverage antennas rarely work well. >> Didn't say that... Must be someone else... Longer reply sent directly to ddjones... Denny -- FAQ on WWW: http
I use a 0.5" dia. ferrite rod (toroid works also) with a ~ 6 bifilar turns of enameled magnet wire... i.e common mode choke... Wire size and number of turns are power and frequency dependent... Cavea
<< On the Garden Island of Kauai and putting up a complete suite of Gladiators! Will you be known as "the ham from Glad"? Denny -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions:
<< whereas the ARRL Antenna Book states The DE-DIR combinations have more gain due to being tightly coupled and therefore the input impedence is quite low... (Read Moxons analysis of supergain antenn
<< Rohn 25 tower not only Rohn 25 is good for more than vhf/uhf.... Follow the mfg's installation guidelines, guy it properly, and if you are swinging big beams use a bridle on the top set of guys...
<< I made a choke using the 4 1/2 in. sewer pipe as a form and Times LMR-400U. Times Microwave specify the minimum radius for this Ultraflex line as one inch. While I wouldn't use RG-8 I feel relativ
When I moved into the new contest qth I put up a 2 el leaning vertical for 160 with two elevated (6 foot) 1/8 wave loaded radials... I also had an inverted vee for 160 with the center at 150 feet and
I have put significant amounts of blood, sweat, and tears into vertical arrays for 160, over the years... As a result I have definite opinions in this area of antenna practice... <snip> <snip> First,
I am seeing posts indicating that some are equating a 1:1 SWR with resonance and attempting to adjust the antenna/radial/ground tuning on the basis of SWR... The two items are separate issues... 1...
OK... I blew it... My post immediately preceeding this was not ready for posting, but was a work in progress in my edit file... I already knew that I had errors about impedence changes in one paragra
Dillsburg Aero Supply has tubing in every size known to man... Borrow a tip from Force 12 and pop rivet the sections together... The aluminum saddles can be had from sources on here... Or have them m
Hola Steveo... Three days ago I visited the station of KN4T, Walt and Bobbi were my gracious hosts, accompanied by K4RN, Bill and his gracious wife Sue... Walt has, as his only antenna, a Mosley Pro