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HP 8505A, Agilent 8714ET...dilemma?

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wd5jfr:
I have one of each but I'd like to have S-parameter capability which I need to learn and use  for 440MHz and lower frequencies most likely at this time.  At 82 I'm trying to find good options to minimize expense and weight.  I don't have an HP 8503A test set and unless I find a good deal on one with APC-7 adapters with SMA or N connectors the 8505A becomes a shelf queen or back breaker until a viable option shows up.  I see HP 8712B and HP 8753D with N connectors at reasonable prices. Also might consider a nanoVNA but there are so many I don't have clue how to select the best for low frequency use and that has a big screen, low price irrelevant if it's good quality and reliable.  Any suggestions appreciated.
Thanks
Hank

joeqsmith:
Basic NanoVNA attached to a PC would get you a large screen but can you deal with the square wave drive and  lack of being able to set the input and out attenuation, along with no DC bias T's?   

colorado.rob:
I agree with Joe. NanoVNA does most of what I need in a VNA. If that's not good enough, modern VNAs from Siglent weigh next to nothing and are reasonably priced. I have a number of boat anchors that I only turn on when absolutely needed because moving them to where they are needed can be so damned difficult. Maybe one day I will have a lab with enough room and bench space that it's not an issue.

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