There are still some "old time" open-frame RF relays available from Eastern Europe, for example: RF Relay: Open frame 2 position relays. Using a pair of these relays it is possibly to build 5 bands s
These are not the best you can buy. They only clamp the cable by trapping the braid, and the braid can still tear out very easily. Also they require the braid to be trimmed and fanned out correctly.
I have written user instructions for a road traffic management company that used the 40ft poles for camera installations. The same thoughts about ham antennas passed through my mind too, but I didn't
Even through the adhesive lined tubing is expensive, it still doesn't contain enough adhesive for many sealing tasks. Having tried it, I have gone back to applying my own hot-melt adhesive from a glu
Although Frank's test with dummy loads is valid, it doesn't directly address Hans's point which is about antennas and feedlines. When there is current on the outside of the coax, the radiating system
Agreed. 10-15 years ago, when Heliax connectors were rare and expensive, I spliced two lengths of LDF4-50 using the brass/copper tubing method. This was waterproofed with self-amalgamating tape, and
Please, let's never call it just "poly" - if we do, we're setting someone up for an accident. If they buy polypropylene rope by mistake, it stretches almost as much as nylon and degrades very quickly
Perhaps something like this: ebay item # 330287848331 The photographs in this listing show the type of construction that is required. (For complete disclosure, I do know the seller, and some years ag
Only in the original unimproved MIL types. The magic word is "CAPTIVE", as in "CAPTIVE center pin". This feature removes most of the uncertainties of freehand cable prep and assembly, and mostly prev
There are pdf copies of old Westower manuals at: http://www.qsl.net/gm3woj/latticetower.htm The individuals who contributed that information may know something about finding replacement parts. -- 73
Please can you expand on that method, Rudy? More and more TowerTalk readers *do* have the equipment. -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek _____________________________________________
www.ifwtech.co.uk/g3sek/stacking/stacking2.htm -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek _______________________________________________ _______________________________________________ Tow
The plane of polarization is not only rotated, but under some ionospheric conditions it can also become de-polarized - in other words, 'smeared out' - by multipath effects. With a completely depolari
Not if you open it inside a big, deep roasting tray. Turn the whole rotator upside-down first, then remove the lower ring. Let the balls from the lower race fall into the tray, and then turn the whol
1. Check the SWR with an antenna analyser connected directly to the antenna. The DC measurements were a good place to start, but they don't tell you everything. 2. If there are N connectors involved,
I wish the steel did disappear as quickly as that! A previous owner of this QTH set up a field test about 20 years ago, and the steel is still as sharp, rusty as ever. The mesh isn't strong enough to
This page will give you a general sense of the tradeoffs: http://www.ifwtech.co.uk/g3sek/stacking/stacking2.htm -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek __________________________________
http://sm2cew.com/plow.htm -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek _______________________________________________ _______________________________________________ TowerTalk mailing list
Hot melt glue, from a glue gun. It can be used with plain heat shrink sleeving, or to fill gaps inside sleeving that already has a thin lining of glue. For "heavy duty" applications, almost all conne
After running the knife down the side, it does peel off, though with some effort. To make it clear, the heat shrink/glue treatment is only applied to ONE connector at a time, to reinforce and seal th