I have to admit to being prejudiced but when top station builders like those at Radio Arkla (OH8X) want reliability and flexibility, their choice is the microHAM Station Master and microHAM single or
Probably something as simple as difference in paint ... ice will adhere to some paints and not to others. Yes, I believe Hy-Gain even supplied suitable washers at some times in their history. Any of
That's entirely possible. Many of the big broadcast TV antennas can be at least that heavy ... for example the Dielectric TW12Bx antenna which is what WSPA is listed as using in the FCC database is
The KK1L "three relay" configuration is a copy of the switching configuration used since the very beginning in the microHAM Double Six and Double Ten Switches. See the basic information at: www.micro
If contesting.com is not interested, check with KA9FOX who is now running QTH.NET along with his QTH.COM commercial site. 73, ... Joe, W4TV _______________________________________________ ___________
The 105BA will not go to 12 meters unless you replace all of the element tips (not long enough) and model the antenna for proper element diameter/mounting. On the other hand, the dimensions for conve
Again, it depends on height. EZNEC and similar software will show the dipole (in its favored direction) will equal the vertical at around 50 feet in transmit. In receive the dipole will generally be
While the current maxima may be 1/4 wave above ground the high E field end of the 1/2 wave vertical (or vertical dipole) is very close to the ground. As a result a 1/2 wave vertical sustains substan
One can see the answers to most of these questions in the picture here: http://tf.nist.gov/timefreq/images/radiostations/wwvh-large/wwvh5.jpg All of the verticals are similar in construction ... note
The radials were added at WWVH after field strength testing showed that the half wave verticals failed to produce the expected field strength due to e-field losses in the ground below the bottom end
This goes back more than 10 years and was probably on topband rather than Towertalk. About the same time as the information on the WWVH radials, N7CL provided data from some of his work for the DOD
Put simply, for such claim to be valid the feed impedance of the cage dipole would need to be substantially less than 50 Ohms such that the total current flowing in the cage elements was approximate
A common mode choke does not solve the issues of grounding the shields of the coax in the K1WA design. The K1WA design relies on the 3/8 wave open coax acting like an inductor to tune the unused slop
I don't know the configuration or construction of the R&L current balun but with 150 feet of foam coax having a Vf of .8 - .84 you are running roughly 5/8 wave lines which is one ay to make the grou
The forward "beamwidth" of the K9AY is about 150 degrees. The real advantage of the K9AY is the front to back ... The K9AY does not have a real sharp rearward null but the rear response is generally
The T6 has a higher gain due to a boom that is more than twice the length of the 2 element SteppIR. The 3 element SteppIR is a much better "apples to apples" comparison with either the T6 or T8. Rep
Channel 6 is 80-88 MHz - not 70 MHz. 70 t0 74 MHz is allocated to non-broadcast use in the US. It is between TV channels 4 and 5 and would not be freed by the reduction of low band VHF stations follo
Even a low Yagi (25' on 10 meters) has a take off angle around 15 degrees. The 43' vertical is much too tall to be usable on 15 and particularly 10 meters. On 10 meters the dominant lobe is at 57 de
In my opinion, the "optimum" solution consists of two antennas. The first would be a roof mounted 22 foot vertical (either a "half size" 43' vertical with tuner or an R5/AV-620) for 20-10 meters and
The test reports I have seen show data on three Mosley models: the TA-33, Pro-77 and Pro-57B. Similarly, there are two Hy-Gain models, two Force-12 models and one each from CushCraft, Bencher, and K