Steve ( for K7LXC ), As I recall the HG-70D had a 3/16 cable at the top with 1/4 for the other two levels. Does that sound correct? Is there any reason not to use the 1/4" cable if a different sheave
jim VE7RF mentioned the common use of crossover windings in toroid baluns, which is the area of some things I'm wondering about before I wind.... Questions: Wouldn't it be better to use less of the b
Hi Jim, Why should one bother for wire and core insulation if the balun will be used to feed a 50 ohms load? 73 Peter know if it was for a 1:1 choke balun... or 2:1 or 4:1 nor what freqs. If enamel w
Vic, Run the 4 wire circuit and call it a day. ? ?I ran this very issue by a licensed master electrician on Friday. ? Direct quote: "If any portion of the load is 120 volt, you need a neutral. ?If yo
OK I just read the Jim Brown power point presentation for the 3rd time now ... very well done. If I have it right... inductive baluns are a no no... since if the coax cable is less than a quarter wav
Another trick to consider is arranging the relays so that there are two sets of open contacts between ports. BTW, it is quite amazing how little relay capacity is really required for a legal limit an
Back to my switch project it seems clear that layout is critical as may be the choice of relay to minimise coupling. Whilst I think I have a stray coupling problem there also seems to be quite a few
Thanks Jim, My original question, or one of them anyway, was do I need more isolation than a single relay will likely provide? From your answer I'd say the answer was no, not necessary. Now this is (
Has anybody used the dx eng super duty saddle clamps for attaching a boom to an AL plate ??? These are the real heavy duty clamps that consist of 2 x mating solid, textured A356-T6 saddles... 1/4" th
Ok What kind of lightning arrestors' are folks using... and where do they get installed ?? I'm going to run LMR-1200DB from basement to base of new HDX-689 tower. At that point, I have to interface w
does anybody remember how these box's were configured ? Buried some where in mu old W2PV material... there is a diagram of one. Think it used a pair of P+B DPDT relays. This is for 2 x identical 40m
It doesn't really matter.. The goal is to make sure that the two points are at "reasonably" the same potential. If it were me, I'd snug it right up against the foundation: 1)less likely to stick a sh
Since you're starting from scratch, and since you apparently want to do this right the first time, what about doing a complete ground system like we read in the Polyphaser papers (and elsewhere, incl
Roger mentioned his tower gets hit 3 x per yr with lightning. Does any of the radio gear/coax ever get fried ? What is getting hit... the top of the tower, top of mast, or yagi ele's ?? If yagi's are
A buddy is going to install a M2 40m yagi [4-el] at 180'... and a 2nd identical 40m yagi... at 89'. The question is.. whether a upper /lower/BIP/BOP switch should be used... or just a BIP/BOP ?? I do
I installed one of my 6 M5X's after being on the ground for a year or so and am seeing High SWR now. Anyone try or have an idea how to test the center balun that has the phasing line that attaches to
Roger, stop stirring the pot! That CB antenna works perfect for what it was designed for. The design was stolen from a guy named Kale who builds the "Penetrator 10K" antenna. I know you are not so na
Roger, stop stirring the pot! That CB antenna works perfect for what it was designed for. The design was stolen from a guy named Kale who builds the "Penetrator 10K" antenna. I know you are not so na
This stuff comes in 8 oz containers [and also larger] The stuff available from my local fastener place is made by locktite. It's used on SS threads so they don't gall, etc. It comes in two grades.. s
Ok... Andrew heliax co sez to use silicone on coax connectors... to eliminate ... 'microscopic arcing'. Ken at Cal-Av sez the same thing. The silicone is to fill the voids..since u always end up with