At 09:00 AM 6/28/2011, Herbert Graf wrote: >So, in my huge amounts of free time I've been thinking that the one area >of electronics I don't really have much experience is radio. I played with the science workshop spectrum analyzer=20 many years ago and wasn't all that=20 happy with it. I don't remember the details but one major problem=20 was inability to calibrate the frequency accurately. It was useful=20 to get a general idea of what the spectrum looked like but that was=20 about it. The last time I used it was probably 10 years ago. I've been using an old HP 8559 for the past many years but late last=20 year, I finally bought something better: its called a Signal Hound=20 . I also purchased its companion tracking=20 generator when they became available early this year. Both go up to 4.2GHz= .. If you do purchase one of the Signal Hound units used, make sure that=20 you get the "B" version. The earliest units (non "B") spew=20 significant amounts of the first LO out the input connector which can=20 (DID!) cause significant problems. I also recently purchased a VNA (vector network analyzer) from=20 . This is a NICE little box that does one and two=20 port measurements. It will function as a rudimentary spectrum=20 analyzer but there are limitations that are at least well=20 documented. Its good up to 1.3GHz. Both of the units I mentioned are fully assembled, not kits and not=20 parts collections that can be gathered up. Sorry about that. But=20 they both work well. dwayne --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .