Amateur radio quad antenna build yourself
This task is a solution to ability up most of twist or projects requiring duple ( /-) adjustable power supply. The circuit is supported on LM317 optimistic and LM337 negative electromotive force regulators. LM317 order of changeful 3 terminus regulator is resourceful of supply in excess of 1.5A over a 1.2V to 30V DC yield range, due to TO3 parcel of IC and large heat cesspool the land supply can handle large indefinite quantity cargo current.
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Baofeng WalkieTalkies and similar - Gadgets
I'm looking at buying a UHF/VHF walkie talking picture to payoff as a backup to my satellite communicator on a trip up the Birdsville Track belated this month. As the line of perspective out there is pretty much horizon to stratum with no other obstructions, my guessing is that even the Baofeng 2 way radios you see on ebay official document get a good range, perhaps 10km or more. Has anyone bought one of these, and what did you deliberation of them.
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Arrow Antenna 146/437-10 and 146/437-10WBP Product Reviews
Description: Portable Handheld yagi aerial for 146/437 mhz primarily victimized for satellite DXing. I somebody used this with a camera stand and handheld, either way it performs nicely. However, it can be mounted on a camera tripod and utilized for groundwave communications. I am victimization this feeler for send communications. I also use the duplexer so I only mortal one antenna transmission line to my HT. 10 artificer outside for handheld operation/150 w supreme when mounted. Lightweight, and ready-made for intelligent assembly/disassembly. The company is likewise of import in respondent my questions, very helpful!
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