I think the 2.53(0.05 dB) number is a typo. He doesn't even say which antenna he is talking about in that paragraph. Assuming it is the Figure 4 graph, the gain difference, looking at his graph versu
Bill, the term "single point ground" is a terrible misnomer. It does not mean a single point ground, or only one ground point. When you think about it, there is no such thing. Only the first person t
I think Bill is just trying to make a point that the name stinks, and I agree with him. Yes the meaning is well defined and accurate, but the term is misleading. Sure, it isn't going to go away. It's
Guess you didn't read my first message. http://lists.contesting.com/archives//html/Towertalk/2007-09/msg00360.html Not that it will make any difference, other than makes me feel better. _____________
I posted this message last year and never got any responses on it. Since the subject has come up again, I will repeat it and see if anyone has any good information. Am I missing anything here? The me
The article does say what the cause of this crack was. Here is what they said: "A word of caution: A Ufer ground consisting solely of the tower foundation is a bad idea. Lightning surges passing thro
I put this thing on EZNEC and with the information you have provided so far. I can see no correlation to anything you have measured. The only way I could get anything close was to assume a bad piece
Do you perhaps have another tower close to this one? By placing another tower 100 ft away from this one and tuning it to the right frequency in EZNEC, the feedpoint impedance changes from 43 ohms to
Instead of asking what does it take to match this, the question should be, why does this not already give a good match. Using your updated information, and assuming some kind of guy wire system that
...."I used a single 8 pf insulator at the junction with the top guy sections and grounded the far end. "..... I'm not sure this is correct. Steve said he said the top wire had 3 insulators. The next
Oops, I lost one of my insulators on the numbers I gave. The resonant point is now 1.97 MHz SWR=1.18 (R=42). It's interesting that the coupling to the broken up guys made the resonant frequency go up
The BL2 balun is intended to be inserted into a piece of equipment. It will not be acceptable for outside use. The balun you need for this antenna is a 4 to 1 current mode balun. It MUST be a current
..."All the 4:1 baluns I know about are TRANSFORMERS. They pass all the transmitter power through the core of balun (transformer). Maybe you know something I don't know. ".... A good commercially ava
I don't know the answers here, but I have been following this discussion trying to make sense of it. I am beginning to get a dim view of how this may work. The definitions of reciprocity given, or im
The USGS website dropped the 1 arc second option from their menu after the last revision of the HFTA instructions, so the answer won't be in there. If you select the 1/3 arc second option, you will s
For HFTA, on the first line of the ".pro" file, put the word feet or meters, depending on your data. I'm not sure how YT works. Jerry, K4SAV _______________________________________________ __________
If your tractor has a three point hitch, look at the "middle buster" or "sub-soiler" implements. They are the same except for the blade. The sub-soiler blade is narrow but doesn't throw the dirt out
Before you consider silver plating a coil, here is something you should know. At 2 MHz the RF skin depth in silver is 0.00178 inches. You need about three skin depths of plating, that's about 0.0053
Sorry, posted to the wrong reflector. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.cont
I counted 66 turns on my XM240 coils. Maybe that's the reason I had a lot of trouble getting it to go low enough in frequency. I would expect to see some kind of difference, either element length or