Just FYI, here is tha standard way aircraft approach and depart an airport: http://en.wikipedia.org/wiki/Airfield_traffic_pattern At an uncontrolled airport, this standard pattern is the way pilots (
A very accurate low-tech way of checking level on a tall structure is a plumb bob. Al AB2ZY I want to level my new US Tower HDX-589. I put a 4' carpenter's level on all three legs of the base section
Could you please explain that to me? This sounds like like a discussion on another forum recently where a fellow asserted that an SWR more than 1:1 would insure that not all power is transferred to
Basically, efficiency is calculated by the ratio of radiation resistance to the sum of radiation resistance and system losses. If system losses are zero, efficiency will always be 100% by definition
Do you mean Noalox? It's in the electrical aisle. Al AB2ZY What is the type of grease used on telecoping tubing sections? I bought some several years ago from Home Depot but I forgot what kind it was
I constructed a K9AY initially using a Minicircuits device for the transformer. I can state unequivocally that they are very delicate. My K9AY is 100 feet away from a Butternut vertical. Tuning the A
I'm sorry, I wasn't implying a mismatch as the culprit. I was commenting on an earlier remark. You were just the catalyst! Al AB2ZY ________________________________________ From: towertalk-bounces@co
Don't want him raising twenty seven pit bulls and a cow, in his basement., I lowered the cow into my basement. Does that make me OK? Al AB2ZY _______________________________________________ _________
Sn/Pb solder doesn't last long in contact with most soils, either. The way I've seen AM broadcast radial systems done, which have a design life of 30 years, is to use #4 Cu wire for the radials braze
If it's not hardwired to your electric service, the NEC doesn't apply. Al AB2ZY A while back on TowerTalk I saw a comment that a nice solution for long 8-conductor rotor cable runs is a pair of "12-3
A phone call to the FAA will usually net you an informal answer right away. I've gone through this with proposed lighting for a football field overlooking an airport and the formal letter only took a
It's the sine and cosine of 45 degrees..... Al AB2ZY Shoot... using the .707 figure for 45 deg I'm back right at the worst case scenario. Where does the .707 come from? I was using a simplified versi
Saw this on eBay: http://www.ebay.com/itm/1944-Curtiss-Small-Prop-Pitch-Rotator-Motor-For-Antenna?item=130661231282&cmd=ViewItem&_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D3%26po%3DLVI
Assuming this is a relatively flat area, why would you need any more than about 20 feet in height - enough to clear nearby vehicles and similar obstructions? Height isn't going to compensate for low
Just to make my point clear, any decent access point can be configured to function as a repeater. It merely needs to be within recption distance of another access point. All it needs is power - no ad
Posted to both Amps and Tower Talk: Found this 3 part article on impedance matching which I thought would appeal to a broad audience. http://electronicdesign.com/content/tabid/57/catpath/communicatio
I doubt it was you at all. I looked at the original message header and it came from a yahoo server, not sbcglobal. Unless contesting.com takes some measure to validate that messages actually originat
Actually, that's not true. As a subscriber to tower talk, I now know David Gilbert's email address and that towertalk@contesting.com will accept a message purporting to be from him. Armed with that k
Occam's razor. The days of a virus harvesting emails from address books are largely over, though it certainly was common 10 years ago. There are dozens of ways spammers harvest email addresses. An ea
Someone needs to tell N4UM that the FCC has no statutory power to rewrite contract law or unilaterally void lawful existing contracts. Nice sentiment, but unfortunately a waste of time. Al AB2ZY ____