With all this great talk about VNA's it reminds me¡ I have an extra 8753ES,? 50ohm,? internal s-para,? working and looking beautiful¡ 3ghz unit.? $3k and also an n8357a 6ghz pna for sale¡ same condition.? ?Will do pics and details direct.? ?This post was just an after thought.? ?I am on a cruise in the caribbean now and can't give pics and full details at this time.?
On Mon, Feb 11, 2019, 11:04 PM Reginald Beardsley via Groups.Io <pulaskite=[email protected] wrote:
Thanks.? I've got a lead on an 8753B with a 50 ohm 3 GHz S parameter test set at a comfortable price.? Gedas gave me a very succinct explanation of why an eternal test set is preferable from a hobbyist self repair? perspective.
Having spent my career in reflection seismology,? I am all too acutely aware of the problems caused by impedance mismatches..? Gedas linked some very helpful papers.which made clear that impedance matching is a significant headache. So I've got some mathematical chores to deal with.
One question I have is how difficult is replacing the N connectors? on a 8753B with an external test set if they are worn out.? Part of what I'm trying to do is is acquire a self sustainable bench.? I want to have tools to fix things.? I can't do anything about the problem of sourcing parts? ?But first of all you have to have the tools to identify the fault.? I've done it with "flint knives and stone axes'" but that is *very* tedious.
I'd greatly prefer to be an actively employed scientist, but that''s not possible in my field, so playing with electronics is the best alternative I can think of.
