You can check the rotor indication with an Ohmmeter. You should see 500 Ohms across the pot and you can determine position by measuring resistance from either s ide to ground in case one side is open
SNIP To my mind, the BEST solution for 40M is to pick the BEST antenna possible for TRANSMIT and use separate receiving antennas if noise (atmospheric or local) is a serious concern. For city lot dwe
WELL SAID Jim, except that a TWENTY METER (Half Wave) Dipole is closer to 33 ft long than 65 ft, which would work very nicely on FORTY Meters. Tom N4KG On Thu, 11 Jul 2002 12:52:55 -0400 "Jim White"
My recommendation for installation would be to (1) install the tower, lay it over (two legs still attached to the roof), insert the mast as low as possible, raise the tower / mast and bolt in place.
The SIMPLE way to pull up your guy wires is to wrap a few turns of a Guy Grip around the guy and pull it with a come along. Tom N4KG ________________________________________________________________ G
Generally speaking, the higher the gain, the lower the Feed Impedance for a split dipole feed. When antennas are tuned to produce a 50 Ohm feed, they give up some gain. The TA33 is a 'classic' exampl
The TH7 was designed to cover ALL of the 10, 15, and 20M bands. Unfortunately, this resulted in a SEVERE GAIN SLOPE on 10M, rising 3.2 dB from 28.0 to 29.7, making it a Killer on 10M FM but worse tha
The gain loss is NOT due to the classic feed (actually a clever idea). The gain loss in SPLIT DIPOLE FED antennas comes from *detuning* the parasitic elements enough to raise the feed impedance to 50
Several years ago, I had a 2L Horizontally Polarized Delta Loop suspended from a 20 ft (6M) boom at 120 ft (36M). It was a KILLER antenna. A local friend uses phased Vertically Polarized Delta Loops
Your G5RV should work on the WARC Bands. So does an 80M dipole, fed with *either* ladder line OR coax. One of my favorite high band antennas is a 20M dipole (34ft) center fed with ladder line. It has
On Fri, 19 Jul 2002 06:29:32 -0400 "john naberezny" <we2f@arrl.net> writes: ALL designs are a compromise of various tradeoffs. The CC Skywalker series antennas are typically around 8.5 dBi free space
There are several ways to use 75 Ohm CATV Hardline in 50 ohm systems. The simplest method is to use a multiple of 1/2 Wavelength (electrical) since impedances repeat every 1/2 WL in a transmission li
I guess it is probably a bad trap, but does this give anyone insight into the likely element? I suppose I will have to take the whole antenna down to do anything, so I will inspect and clean them all
Plastic OWL's will work until the birds realize it is NOT real....about 3 days. I found that a REAL and DEAD Bird laying on my roof kept the rest of them away for some time :-) Tom N4KG _____________
That will work, UNTIL a big wind comes up and bends the F12 elements because they cannot support the increased wind load :-( Tom N4KG ________________________________________________________________
Another way to fit an Inverted L into limited space is to fold the end as needed, keeping the angle 90 degrees if possible. You already have one bend at the apex. Another near the tail isn't going to
With a 115 ft coax run, the maximum loss in RG213 will be around 1.5 dB at 28 MHz and 1.0 dB at 14 MHz. Low Loss Coax will save you at most 1 dB (for 0.3 dB / 100 ft cable) and only 0.5 dB for 0.6 dB
With a 115 ft coax run, the maximum loss in RG213 will be around 1.5 dB at 28 MHz and 1.0 dB at 14 MHz. Low Loss Coax will save you at most 1 dB (for 0.3 dB / 100 ft cable) and only 0.5 dB for 0.6 dB
When I modeled a 2L Yagi, I played with the reflector dimensions to see where it would become 'invisible'. Basically, any conductor Less Than 0.25 WL at the frequency of interest is nearly invisible
A 2L 3B or 2L 5B QUAD is probably the most bang for the buck. I like the F12 C3S and C3E antennas for their simplicity and bandwidth. The F12 C31XR is the BIGBOY of tribanders. The Bencher SKYHAWK is