Yes, I've autopsied a few blown BN-86 baluns in the last 30 years <G>. Notice the "Current Balun" in the upper right is a different type face than the rest of the manual. I think someone is playing
Commercial/Military masts made by Wil-Burt are available with locking pins and guyed versions for large antennas/tall heights. They are often used for COW (cell on wheels) and tactical military micr
Steve, The "BC Trapper" design using RG-213 coax traps on the 2" PVC is attributed to K1ZM and has been duplicated many times by others for many years. I will not get into the debate over the quality
The Idiom Press web site has updated installation instructions for the "new" Hy-gain controllers. You might check those instructions to see if they deal with the delay issues. 73, ... Joe, W4TV _____
If your friend will call SteppIR technical support at: 1-425-891-6134 between 10 AM and 3 PM Pacific time, Jerry will get the matter straightened out in no time. He can also e-mail Jerry at "support@
Euro/Dollar have not been at parity for more than four years - closest they have come is $1.16/EUR in November 2005. Be careful though that you are comparing apples and apples ... the Ultrabeam pric
Try here: http://www.superbrightleds.com/BA9S6_specs.htm Available in white, blue, green, red, or amber and 6/12/24/48V at $1.98 each. 73, ... Joe, W4TV ______________________________________________
That's a rather rough test for the R7000 or any "no radial vertical." The radials are "hot" and couple rather heavily to the soil. Performance should improve significantly by moving the base up to 1
It's not advertising lingo ... it's the terrible status of our educational system that allows a professional writer to say "10 times lighter" rather "weighs one tenth as much as" or (properly for a
It's rather difficult to do an analysis for more than two bands due to the various interactions and changing loss with frequency due to circulating currents, etc. However, I believe L.B. Cebik, W4RN
The current in the trapped, parasitic element creates an I^2R loss in the traps of that element. The decrease in current available for re-radiation represents an effective I^2R loss to the driven el
Because the loss (trap Q) is not constant. If you are willing to rebuild your models from band to band it is possible to get close but optimization can be difficult. The change in Q effects both cur
This is a canard. The groundwave signal is constant and all antennas will be effected equally so long as they are at a constant height above ground. Since the ground is not perfectly conducting or p
A changing electromagnetic field generates current in any conductive element in that field. The amount of current is proportional to the level of the field, the resistance in the conductive element
The MonstIR and DB-36 already use this approach ... they have three active elements on 40/30 with a shorter fourth element added as a first director or 20-10 meters. An experimenter could easily ext
Alternatively, a J-pole making the bottom 1/4 wave out of "ladder line." It's lighter than a coax fed vertical dipole, the "feedline" does not need to come off at fight angles and the bottom end of
13V / 13 KOhm = 1 mA Transformer is most likely 12 V since it has a halfwave rectifier with capacitor input filter driving the 13 V zener (regulator). None of this is rocket science ... 73, ... Joe,
Not likely. The primary determinant in take-off angle for any horizontal antenna is height. While a well designed yagi will have a slightly lower take off angle than a dipole due to the reduced radi