The later models are solid state controlled and use solar power. They put out a pulse about 1 per second and will not short out and arc like the old ones. The old ones will start fires. Buy him a new
Interesting. How did you measure the forward gain and F/B ratio. The reason I ask, is an isotrophic source does not exist to compare with and f/b requires a good calibrated attentuator with 0.1 db st
It is a Texas hill (10 acres) - not a Colorado mountain I am talking about. My qth is about 400 feet elevation above Fort Worth (15 miles SE of me). The rock is solid white limestone from about 18 in
The last big windstorm here left the large limbs from the oak trees scattered around the yard and some big limbs came through the windows into the den. The entire tree trunk was broken and tossed abo
I wouldn't be concerned about induced voltage into the Romex. In the event of a direct hit (unlikely) anything conductive is subject to arcing over to the line carrying the lightning current and then
When lightning hit my Dad's house, it completely vaporized the 2 position ceramic knife switch on the tv antenna as well as the relatively small ground wire (#10) and then proceeded to jump about sev
Tony, The normal way is to use a spark gap set to 1/16 for 100 watts or more depending on your power level. It should never arc over during transmit. The spark gap is grounded to a GOOD outside groun
Be sure to look in the legs of the tower for the bolts and nuts. They are special galvanized FINE THREAD hardware and come with the tower. Several people found them after they had bought new hardware
Don't underestimate the old standard RG213 coax. It DOES NOT have a foam dielectric and is much more rugged for normal use, especially on towers and where it gets flexed around rotators and usually a
The purpose of the Capacitor is NOT a start capacitor. It is a phase shift capacitor to get as close to 90 degrees phase shift between the winding phases in order to make the motor run as a two phase
Are you sure? My rotator does not have any relay and the brake and motor are certainly NOT in series, although it may look like that since there is a common neutral wire and it is convenient to draw
Does anyone know what device is used for Rotator Wire Protection and can it be purchased from Mouser or other electronic supply? Since it is a shunt device, it must be a leaded device that can be hom
Yes, but I want to build the device myself using suitable components (leaded heavy duty devices)rather than buying the complete assembled unit from Polyphaser or ICE. Am unsure of the ratings and typ
Everyone is too old to be climbing on a Self Supporting Crank Up Tower! Sounds like you are able to lower it. Why not carefully lower it all the way down and then check the motor drive belt?
Designing to the wind speed is normally required for any structure that requires a building permit including towers (but not antennas on the towers). Designing to survive all kinds of flying debris i
Move the tower away from the house and guy it like Rohn recommends. Assemble the tower completely on the ground, mark it carefully, and take it apart. Leave the first and second section assembled and
I bought my 64 foot Rohn 45 Foldover tower new and stacked it myself with the aid of a couple of sons for a ground crew. It is a very nice tower. I would not trade it for all the crank up towers avai
For a Rohn 45 Foldover tower, the folding section weighs 100# and the Boom Section weighs 165#. They are very heavy on a Rohn45 Gin Pole and in both cases, the gin pole is only extended enough to rai
Look in the Radio Amateurs Handbook for step by step details. Basically, you strip the braid and inner poly insulation, cut them to the correct length, strip the center conductor, tin the outersheld
Statics 101: An object is at rest when the forces up equal the forces down. Don't matter how many pulleys you use, unless you make a second attachment to the tower you don't gain anything as the grou