Dave, Why sad? If you enjoyed using it then it served its purpose. Having the ability to switch just means you can optimize some of the time - MOST of the time the stack is the strongest and if one h
Dave's original statement was "can someone model 2 40 meter yagis stacked?" .... at the time the discussion was about stacks - then got in to the relative performance of 40 meter stacks ... my intent
I had a somewhat similar scenario happen on my (somewhat) recently installed tower. The rotary 80 dipole at the top would have a low SWR until it rained when it would go up quite high. Within general
Vytenis, Sounds like a great antenna! The formula for changing it is a simple one ... first measure the actual length as is. Then put it up and measure the point where the reactance, X, equals 0. Tha
Chuck, The reason why this will work is because you are FIRST determining what the formula is for that particular antenna in situ. So if it were say 22M tall and it resonated at 3.467 Mhz then the "f
these are only starting points! Local conditions - the antenna itself, the surroundings, the ground, etc etc will all conspire to move that value up or down slightly. KNOWING what your particular ant
One should be able to get within say 3% .... 5% tops to start with right?! Measuring the actual frequency of the actual antenna and changing it this much will work ... if done properly in one go. Ive
Richard, I have a 147' R55 rotating tower with 5 monobanders for 15 - 40 as well as a rotary 80 meter dipole at the top. I had concerns about momentum but have to say it really hasn't proved to be a
I have a F12 Magnum 180 ... its 76' long with 26' T-bars that are about 13' from each end. There are massive 3/8" aluminum tubing coils at the center, one on either side to add inductance and then I
I had a 143' R45 rotating tower (RTS with rotor at 40') .... and now have a 147' R55 rotating tower (K0XG w/ rotor at base) ... I can't say I've ever seen it 'twist' ... the whole thing turns and pul
John - set the Alternate Zo to the Rr of the antenna at resonance to get a picture of what it would be if matched... somewhere around 36 ohms should do. g. AutoEZ appears to be a valuable tool. I am
My home owners covered something like $30K of personal property and that included the tower I was told ... I added another $50K of coverage for I believe it was $60/yr ... AND had them add to that "c
Hello forgive me, Im sure this has been posted here at some time or another (I did do a search but there were MANY to go through) ... I bought a used 1022D ring 6 years ago its been in the box ever s
Thanks to those that responded... I now have the info I need for the 1022D. Gary K9RX _______________________________________________ _______________________________________________ TowerTalk mailing
I have an older model ring ... the motor is a substantial (hefty) box with a wire guard over the output gears ... my question is this: is there Overtravel built in? Theres mention of OT in some of th
Ok ... so discovering this myself Im posting it here so if someone else needs it and does a search they might find it here... There are 270 teeth on this ring. The setup was down inside in air condit
Anyone else have issues with the bolts that hold the tower baseplate to the main gear? I went to grade 8 bolts here as to me this is not a good idea to have those VERY long bolts (7) holding these tw
Bill, Good to hear from you ... hope youre well! So J bolts are used in the base in to the concrete correct? Not what Im talking about here. Im talking about the bolts that go through the plate that
Hello guys... I cant seem to find the F12 reflector anywhere. Contesting dot com use to have all the reflectors listed but have dropped that and now I cant seem to find it. Anyway Im hoping to find a
tried that - Ken says he didn't get any docs. Gary Assuming the "F" in F12 stands for Force. Check out https://jkantennas.com/ 7 3 Bob N2SCJ --Original Message-- From: TowerTalk [mailto:towertalk-bou