The database method will produce a table with rounded, uniform numbers in the distance column and interpolated heights; but when using a local topographic map it's probably easier to do it a differen
Somebody had to be first, and Mr E Clark Quackenbush [1] did a fine job... for its time, which was in the 1930s. But it's important to remember how long ago that was. That problem became apparent ver
Or even worse, the centre pin pushes *forward* and breaks the center pin of the fixed socket. That can easily happen with some types of cable, and then you have a rig to repair - or worse still, say
Take care to use the right grade of Loctite. The blue liquid 242/243 should be fine for the three undamaged holes, as it is designed to be released with hand tools. For the fourth hole that doesn't
I did say "for a receive-only setup". Duplexing UHF on a HF transmitting coax requires more thought and planning to avoid overload or damage, but can certainly be done; and Pete's application with Be
For a receive-only setup, you could easily run the 315/433MHz control signal up the coax, along with 12V DC power and the returning signals from the Beverages. A few inches of wire threaded under the
[...] [...] Watch out for PST rotators in a tilt-over tower, because the water shield over the top seal is only fully effective while the tower is upright. If the tower is routinely tilted over for s
Just askin' :-) -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@c
I asked that question of the British crankup manufacturers, but they only use stainless steel for locations like harbor walls that are directly exposed to the sea. For all other locations (including
If the tower really is of English origin, you will probably find the answers here: <http://www.qsl.net/gm3woj/latticetower.htm> -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek __________________
W7EL concluded that arrays of base-fed 1/2 or 5/8 wave verticals do not work as expected, because the presence of the other elements distorts the current distribution. The effect is small for 1/4-wav
One solution is to fix stainless studs into the threaded holes, using a permanent thread-locking compound. The studs pass clear through the holes in the lower part of the rotator shell and can be se
And what's all this stuff about burying St Joseph? Well, I Googled it. Google is *not* my friend any more. -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek _______________________________________
As promised in the earlier discussion, the web image for these useful clamps has now been updated: <http://www.rappa.co.uk/products/151-four-way-line-clamp-25-pack> The US supplier is Premier Sheep S
Hi John - try one of these http://www.rigexpert.com/index?s=aa54 an order of magnitude better than the MFJ Dave G0OIL -- Original Message -- From: jcowens1@comcast.net To: WWDXC Cc: DX Chat ; Towerta
It's the same with diecast rotor gears. If the antenna is parked habitually in one direction, moving slightly in the wind, all the metal fatigue is concentrated into one or two teeth. Same here. -- 7
Right here, 3 days ago: fill that 90deg angle with an O-ring molded from a small amount of Coax-Seal, and then screw the PL-259 down onto it. This seals the circular gap where water can creep in, and
Sometimes you need a little of both. For example, a bulkhead SO239-PL259 connection will always leave a small gap between the flange and the end of the ring. There's no way to stretch tape tightly in
Bob, I'm trying to reply to your direct e-mail but messages are coming back "undeliverable". I will try again when condx improve :-) -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek ____________
One way is to clamp the end of the roll between a pair of galvanized steel busbars, and then connect to the middle of those bars using SS hardware. Lengths of galvanized steel bar, ready drilled with