AD8302 part
¿ªÔÆÌåÓýMost of the AD8302s that I¡¯ve purchased have been off eBay¡ and they seem to be within specification.? I¡¯ll bet there are some floating around that are drop-outs but luckily I have not received any.? The last lot I bought was 50 for $49¡. So you are right, about a buck per. ? I agree that most of us try to avoid complex functions and math.? But the truth is, if a person spends the time and really understand it¡it can make things soooo easy.? Example: If you plot the load impedance of any random load (antenna) on a smith chart¡ you instantly know what you need to do to transform it to 50 ohms real by following the lines.? Most of the very complex (read that military) tuners work that way (and it all started back about 1960-ish).? When I was in school, I was not a fan of Smith charts, but over the years learned to respect their power and true value.? Today I can¡¯t live without them. ? You probably already surmised this, but you can just add a known capacitance (or inductance) to the unknown vectorized load measured with an AD8302 as R (+/-) jX and tell if the non-real part is plus or minus by the direction it moves.? That is, does X get smaller or larger. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: Like us on Facebook! ? Moderator ¨C North American QRO Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Jerry Gaffke via Groups.Io ? The AD8302 is an interesting part, been around a couple decades now, about as long as the AD8307.
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