When using pairs of elements with the same spacing and phasing, and the third element disconnected, an equilateral triangle array and a right triangle array will have exactly the same gain and beamwi
There is no problem with correctly assembled N connectors at these power levels; but there is a risk of failure if the centre pin is not mated correctly. This can happen when N connectors with a floa
Looks good to me. The centre conductors in the Andrew cables are anchored against endways movement by the foam, and also their connectors are captive pin; so no problems there. Likewise the RG213 jum
The most important factors in shaping your vertical pattern are the antenna height, stacking (if you use it), and YOUR terrain profile. Unless you live on flat terrain, you will need HFTA. Compared w
[RFI] has the best "sleep mode" of any forum I know. When there is nothing to discuss, it can go for weeks with no traffic, and that's how members seem to like it. But when a topic does pop up, almos
Follow the link from my home page (below) to "Stacking". -- 73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek _______________________________________________
TowerTalk may not be the best place to ask these questions. The high power 2.3/2.4GHz users hang out on MOON-NET http://www.nlsa.com/nets/moon-net-help.html and also possibly on AMPS http://lists.con
Hold on there - you did TWO things! Now which one of those two things solved your problem... or was it both... and how can you tell? That's the problem with "it worked for me" reports. We always conc
Agreed. To add some detail: braid has a larger total surface area than solid if you count all the individual strands - but that is not relevant at RF (including the high-frequency energy component of
For installing the BP60 Versatower, I had a strong steel frame made to hold the four M24 bolts in exactly the correct positions while the concrete was being poured. It worked perfectly - the base pla
That's absolutely right. However, it's not just a matter of energy - you need enough capacity to shift a whole truckload of concrete up the hill very quickly. Otherwise you're into rapidly escalating
Many of us have a w*nch that reels up the bed-sheets... full auto-brake too. -- 73 from Ian GM3SEK _______________________________________________ _______________________________________________ Towe
I am doing something very similar. The method comes from having much more time to think about the job (while traveling) than time to actually do it. It also rains a lot here, so it's important to do
Even betterer, track down an SDS to square-drive adapter, and have a choice of socket sizes. Sorry to hear that SDS tools are still hard to find in the USA. The SDS hammer drill system is truly wonde
That particular model (or something very like it) has been around in Europe for some time, but those large SDS drills may not be the bargain they seem. At 10 pounds they are too heavy for anything bu
Right... sorry this has turned out so long, but I didn't have the time to make it shorter :-) Every home handyman probably has a compact electric drill with a keyed chuck, and an optional "hammer" ac
Like K6BR, I've been around the block with airspaced cables like 9913 in a wet climate, with 1500W at 432MHz to punish any mistakes. If the end of an airspaced cable like 9913 is not completely seale
You're right to say that a vertical antenna is unbalanced. All verticals are unbalanced by definition - they cannot ever by symmetrical with respect to their environment because one end of the antenn
A vertical with radials on the ground is a valid exception, though not for the reason you give. With no choke at all, the total ground return current at the feedpoint will divide itself among all the
If you stack two horizontally polarized yagis one above the other, the E-plane (horizontal) beamwidth stays the same. The H-plane (vertical) beamwidth is reduced, but not exactly halved. For more det