Iwas told by the manufacturer I purchased my 6 screw anchor from,that they had a pull-out strength of 14,000 # when screwed in toundisturbed sand. I have no way to confirm this as I no longer havethe
It was not that hard for me to drive in some 6" screw anchors. (... and I hope I didn't do anything wrong). I use a sledge hammer and a 5' break bar. I turned the anchor as far as I could. Then I gav
I don't know for sure, depending on shielding requirements but if you only need a 4 conductor cable, 16 gauge or larger, but 14/3 should work. Hans - N2JFS I have just installed a M2 2800 rotor at 15
As a true balanced tuner frequently is just that, an unbalanced antenna will still cause common mode current in the feed line with a current in the coax feed to the tuner. What I understand (and many
In my humble: You shall ground the shield in both the tower end and the shack end. You should NOT ground the pair anywhere but at the controller, that is; you should only connect the wire pair to the
Groundingthe shield (and not the return wire) at both ends is for shielding purpose, but Ibelieve, as long as the shield can carry any current from a lightningstrike (with it probably can't) it will
I do have to add that when I attach my northseeking plastic owl ... :) Hans - N2JFS Engineers and proficient technical people live in a world of measurement, optimization, and facts. Lots of things "
Hans - N2JFS But to be a proper match you need to have a northern owl. Any other would have a potential for excessive OSWR (Owl Standing Wave Ratio) ...and for lightning protection you must ground th
Drax, You, shamely forgot the Northseeking, plastic owl. https://www.facebook.com/media/set/?set=a.10152578225393539.1073741827.579753538&type=1&l=cac8945b76 Hans - N2JFS On Tower Talk no antenna is
As I will move my shack from being rather "primitive" to be more lightning proof I need to figure out how to enter my ladder line from my Windom antenna. My access panel has multiple coax entries and
How short is "short"? I have five coax from the shack to the top of the tower. Each is 88 feet. Is that too long? Hans - N2JFS Yes, you can use coax lines as pathways for your ladder line to enter th
If you have a true 50 ohm load and a 75 ohm feeder you may end up with an SWR of 1:2, which many SS amps can't handle. That's the worst condition. I am using 75 ohms myself and rarely run into proble
I think the real question is whether a such a hybrid/coupler/line sampler would have a characteristic impedance? That is, if I have a 75 ohm source and a 75 ohm load and I put a line sampler (designe
Hi Jim, Correct, an SWR meter (made for 50 ohm) would show 1:1 but your 75 ohms line is now not matched as it sees a 50 ohms load. The short 75 ohms line does not upset your set-up. That's why it is
Correct Don, That's what I will try to do with my next 2-meter antenna. As I have a bundle of 72 Ohms feed lines why not utilize it all the way. Hans - N2JFS I wonder why no one has mentioned the fac
Jim, If I recall my radio teacher, 50 ohms were decided sometimes during WW2 or even earlier. There were some switch from (I may be wrong here) from 50 to 52 ohms at one point. As a result the "obsol
Gentlemen, Two questions regarding the finishing of my new radio shack: Where to put a power line filter: The shack is totaly shielded (wrapped in aluminum foil and copper wires) and I am planning to
Bryan, Theonly thing I don't like with your pictures is how you attached thelifting block to your house. I get nervous each time I see somethingattached to a house with no apparent enforcements. Howd
I still trust my north-seeking, plastic owl better. Hans - N2JFS For those needing a starting point for their wench holding a plastic owl, looking for true north, may want to try........ http://www.n
Gentlemen, I don't know if i did something very wrong but I started but putting a large granite slab (6'x5'), 5 feet down where the tower was going to be. I had 12 holes drilled in the slab and attac