I couldn't help but notice a few responses in the thread speaking of needing line-of-sight. Unless you have significant hills for either or both antennas (TX & RX), then it is improbable that you can attain line-of-sight at 40 miles. For example if the RX antenna is near ground level, then the TX would need to be over 1,000 feet tall, just to account for the earths curvature, i.e., no intervening hills, trees, etc. VHF signals will "follow the earth's curvature" a little, but UHF, not very much and at cell phone frequencies you are pretty line-of-sight, where cell towers are typically spaced at 5 mile intervals, such that any given tower only has to reach out 2 1/2 miles to you. Part of the low cell range is low power, design to re-use same frequency nearby & time division schemes the set max range.
When they went to digital TV, transmitter power was dropped by a factor of 10X & sometimes even more. It is possible to pull weaker digital signals out of the noise than analog, hence the power reduction. It gave the added benefit of being able to re-use the same frequency for a not too distant station & not have the two interfere with each other.
Just interesting "stuff" that I ran across & found interesting. Hope you do too. :)
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
