The problem isn't amplifier designers, it's the radio designers. Check almost any "modern" solid state rig and you will find an initial overshoot on the first CW character ... even without an amplif
OK, guys and gals ... this should get the discussion going. I'm just the messenger. Check out the full details at http://www.arrl.org/news/restructuring -- -- ARRL Proposes Simplified Amateur License
Actually most commercial tower installations use rather large guy anchor areas. Most of the TV/FM towers I have worked around use 6' high chain link fence to enclose the guy anchors and the area ins
John, 1) the rotor has a wedge brake ... that makes it a HAM series rotor (the CD-44 had no brake) 2) The metal case control box design marks your unit as an EARLY HAM-II -- FAQ on WWW: http://www.c
Au contraire ... the CDE rotors use a capacitor start capacitor run motor and require the phase difference between the two windings (provided by the capacitor) in order to run. There is no centrifug
One point, Pat ... do not put the lowpass filter between the tuner and antenna. Put it on the input (rig side) of the tuner. One, high SWR is hazardous to the lowpass filter ... and two, the tuner i
I doubt that Rohn's safety factor is anywhere near 3:1 ... EIA 222-F specifies safety factors between 1.5 and 2 to 1 in the steel depending on several things including length to diameter ratios of t
Using the control boxes in parallel most definately WORKS if handled properly. I used parallel T2X/HAM-4/HAM-M control boxes for several years in the late 70s and eraly 80s. First, I did not connect
The X7 and X9 use a truncated log cell (4 elements) as the driver, not monoband driven elements. Force 12 uses an open/closed sleeve and HyGain uses a full log cell. All three designs are valid ways
Jim, if you want to attenuate the 20 meter harmonic in the 10 meter band, you use a SHORTED 20-meter quarter wave (aprox. 11' 8" of .66 vf line) connected to the t-connector. On 20 meters that line i
If the local cable company's plant is so sloppy that the ingress/egress is a problem on 144.25 +/- start scanning the frequencies in the AIRCRAFT BAND for cable signals. Once you find them, THEN call
Two reasons ... 1) the Cushcraft 2-el 40 has significantly less windload than the TH7 and thus stacking it on the top will impose less stress on the mast. 2) the added height is more important on 40
As near as I can tell, the reason for the new beta is to allow adjustment for the "174CA Option," a set dimensions for operation of the antenna on 17 Meters. According to my (new) 204BA manual, the "
About two years ago I looked into safety factor for a broadcast tower. The structural consultant was kind enough to send me copies of the specifications/rules. The required safety factors are not con
The article was "Quads vs. Yagis Revisited" by N6NB (Dr. Wayne Overbeck) and appeared in Ham Radio, May 1979, pages 12 through 21. 73, ... Joe Subich, W8IK ex-AD8I <W8IK@ibm.net> -- FAQ on WWW: http:
The article was "Quads vs. Yagis Revisited" by N6NB (Dr. Wayne Overbeck) in Ham Radio, May 1979, pages 12 through 21 makes just those types of measurements. Since I just happen to be "up north" and h
As a Director of Engineering at a channel 13 TV station, I suspect I have a bit fo experience in this area. 6 KW at 60 feet above average terrain is a bit out of the ordinary. The FCC rules for Class
Your estimations of weight are WAY off. From the Rohn catalog: 45G 10' section 70# 45AG2 tapered top section 2 3/8" OD tube 60# 45AG3 tapered top section 2 1/4" OD tube 60# 45AG4 7' top section - fla
Bite the bullet and get a crane. A good crane operator will be able to put someone up along side the mast in a bosun's chair and the antennas can either be removed one at a time or the lift line can