Looking through some old notes plus the info on Jim Brown's site.... there was a question about using an electrical 1/4 wave or electrical 3/4 wave of coax. The 1/4 [3/4] wave of coax was run between
Thanks for all of the tips! I haven't decided if I will take the plunge myself, or try to persuade the club to purchase one. It may be a bit difficult to get it through the OF network of the club...
That's an Alice In Wonderland view of things. Yes, the coil of coax is an inductance in the common mode circuit, but the common mode circuit also includes the series impedance of the transmission lin
&&& The K6XX circuit just doubles the OCV when T=0 The 12 vdc across the 47 uf cap in his circuit is now in series with the 12 vdc OCV... so you end up with 24 vdc... for a split second...until the c
12 ga AL wiring all over the house. [built in 1972]. to be 3 ought CU. Since the distance from the meter to the 200A main panel is typ short... I see no savings using AL. AL is a pita..used anywhere.
I have some modeled examples on my web site which illustrate the effect Jim [K9YC] is talking about. Take a look at the section "Why reactive chokes are undesirable" on this page: http://www.karinya.
Hi Dale. I've been in the fire service for 27 years now and I can't tell you the number of surge suppressors of the type that are typically installed on a 1/2" or 3/4' knockout hole*http://tinyurl.co
Jim, I agree with your statement about most consumer grade surge protectors.? Many cannot handle arc flash and the tremendous amount of energy from a strike.? Then many that could are not installed t
OK, I see mentioned on most rotors... specs like "start up torque" and "running torque" and also "stall torque" I also notice on most rotor's, the start up current is 2-4 times the operating current.
Yes I basically agree, but I wanted to give my example of how a reasonable person can make a serious error in designing a grounding system. In my house there were two grounds: the electrical panel in
The Georgia Power Co whole-house plan is called Premium Protection, and I believe is being sold by power companies all over the USA. They do the magic on the electric lines, CATV, and telephone lines
Anyone else copy this the last few nights? Was real strong in NW PA. Wisconsin must have been hearing it, as they had to move a traffic net to a different freq. Appeared to be speaking Russian, or p
Greetings from Chiangmai where every prospect pleases. Been following the thread started by the gentleman asking about feeding his G5RV (or variant thereof). The humble G5RV antenna was invented not
I'm not sure if Force12 still uses riveted construction of yagi elements. In any event, I just experienced my first rivet failure on my C3S (great timing, huh?) and would like to avoid repeating this
The Force 12 rivets are not your standard rivet. They use a special kind as I recall. I had an XR5 here and though they may be available from some other outlets, I ordered a bag of 100 from F12 back
Yes - one side of my 15M driven element is now the same length as 10M. 73, Barry N1EU to fatigue ??? tip...with 3/8" OD x .058" wall tips. The .058" wall tubing is a lot stronger than the .035" wall
A mandrel or something inside the tube also helps. A piece of rod with a cross drilled hole... tubing..and it works VERY slick. Drill Guide Kit - DXE-D3206 http://www.dxengineering.com/Parts.asp?ID=2
In a fixed configuration Yagi-Uda, you're looking to simultaneously optimize Z, Gain, and F/B, and that's hard to do over a frequency *range*. have your cake..and eat it too. Then all that's required