Mine certainly has - tied to an 8ft post, on a hilltop only two miles from the Irish Sea. The top quite frequently bends below horizontal in the gales, but it comes back again. Since the constant swa
UHF plugs are more tolerant of end forces because the center pin is much larger and more firmly anchored. The main problem with N connectors is that the original MIL-standard design has a floating ce
They can have, it the end force is large enough. Yes, 7mm center conductor ID and 16mm shield ID. Those two dimensions give almost exactly 50 ohms. In short - more ruggedness than UHF, more performan
Just wondering what you mean by "Gee... it's 6 meters"? Radiation from the coax when transmitting is only a small part of the story on this band. On receive, 6 meters is a lot quieter than most peopl
Among all the recommendations that will surely follow, don't forget hot melt glue. It has excellent sealing properties, excellent RF properties (being a close relative of polyethylene) and no problem
Just so. If you don't have any glue-lined heat-shrink tubing of the right size, you can always "butter" the object with hot melt glue first, and then quickly apply the heat shrink over the top. That
That's good news, Bill - could you post some details or a link, please? It would be very hard to improve on the cheapest garden-variety white translucent stuff. This is amorphous polypropylene, which
You're so right :-) 1. Someone wrote me with a clever and simple idea: file across the holes using a 1/4-in round file, until the metal has been reduced to a thin edge. This will be much easier to so
The zinc coating will be fine... but only for as long as it lasts, and then you're down to bare steel which is useless. So the answer depends entirely on the chemistry of your soil. At this QTH, a pr
To clarify what I said earlier, the skin effect means that the RF current flows initially in the zinc plating, which is quite a good RF conductor. The steel core is not involved unless (or until) the
If you're willing to build it yourself, and can accept an upper frequency limit of 60MHz, the N2PK Vector Network Analyzer is comparable in accuracy with professional VNAs of the HP4195A generation.
For the record (and correcting an error in the 4th edition of ON4UN's 'Low Band DXing') the N2PK VNA does not have a broadband detector, and does not suffer from those well-known limitations. It uses
That's correct. Like a professional VNA, the N2PK does not rely only on the quality of its construction and components. It also minimizes its internal errors by being calibrated with an open-circuit,
"International" Building Code? Is that something like the Baseball "World" Series? -- 73 from Ian GM3SEK _______________________________________________ ______________________________________________
[...] From experience with moonbounce systems, a TVRO jackscrew would definitely be the way to go. Elevation rotators that are based on small TV rotators have a very poor reputation with anything lar
If you drill and re-tap, replace the original bolts with threaded studs, and fix them in place with permanent thread-lock. Then use Nylok nuts, which can be removed much more easily if anything goes
C'mon, Bill - every other respectable RF connector series uses Teflon! The sky definitely isn't falling. -- 73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek
Don't stop when the nickel is removed, but continue filing across the hole until the brass comes down to a thin edge. This makes it much easier to solder. -- 73 from Ian GM3SEK 'In Practice' columnis
There are certainly lots of cheaply-made 259/239 connectors around. Some of them use a white plastic that is meant to look like Teflon, but isn't. Weren't there some elbows that used a bent steel spr
Go to: http://www.pmillett.com/tecnical_books_online.htm That site already has several copyright-expired electronics books online, so they understand the issues involved. There are many more copyrigh