My EZNEC modeling of horizontal dipole indicated off center feedpoint does not change the radiation pattern but does markedly change the feedpoint impedance! k7puc
There may be different versions of the LM470 with different rotator mounting methods. My LM470 purchased during the FirstCall fiasco (about 2 years ago) was advertised as having the capability to mou
The two LM470 towers that I purchased two years ago from Paragon Mfg thru FirstCall came with an "improved" motorized winch assembly. This improvement was a change from a separate electric motor driv
Move your site to Olympia, Wa! Back on Oct 25, 200, it cost me $189 to have about 8 yards of concrete pumped 200' to my tower hole. But then, it was downhill (hi) and the outfit was named "Concrete C
How does the center of gravity play into the discussion of leaning towers? My 70' crankup (which has no means of leaning adjustment) has a center of gravity that wants to keep it vertical (or near ve
I am still getting e-mails from Towertalk subscribers (and others) asking what I meant or what my purpose was in sending an e-mail to them. I have not been sending them (or anyone else) e-mails. It w
start with the output capacitor at Why don't tuner manufacturers provide dial calibration marks in terms of capacitance and inductance's rather than 0-10 or such? k7puc
Not many (only 2) responded to the posting asking for Vee beam info sources. The best source I know of is the ARRL Antenna book (18th) and that has only one page! But I find it to be very confusing w
on First, Earth is said to be a pretty good reflector. Second, EZNEC reports for a half-wave 68' dipole 30' high at 7.04 mhz: no reflector perfect ground 7.93 dbi straight up 70' refl on gnd " 7.93
Remember, the original posting was for a NVIS antenna, i.e. signal going straight up. EZNEC reported a modest straight up gain (half a db) for a dipole at 96' with a reflector at 80' (ground error o
If the insulation in foam type coax gets wet, does that effect the vswr? Or, if the vswr is low, does that confirm that the coax has not get wet inside? k7puc
Although I have a Glenn Martin tower and Hazer, I have yet to install it. However, Their literature clearly claims that "...you never have to climb a tower again..." and also includes "...never climb
holds I might not have the TX472MDP Raising Fixture but I do have the MDP raising fixture that came with a used HDX472MDP tower. The fixture uses a Fulton 2550 brake winch. I also have three other Fu
Will someone please explain what CAD welding is when applied to wire connections to ground rod, towers, etc. How does one get equipped for accomplishing it? TIA k7puc
I am getting at the phase in my tower assembly to install the mast and wonder if a thrust bearing is really necessary. My installation consists of an Orion 2800 rotator which specifies a vertical lo
Our club is planning to have an NVIS antenna for 80m and 40 meters during Field Day. However: The World Radio Books publisher's "Near Vertical Incidence Skywave Communication" book purchased from ARR