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Old 10th Mar 2021, 1:21 am   #99
Matt kd4pbs
Tetrode
 
Join Date: Mar 2021
Location: Raleigh, North Carolina, USA.
Posts: 62
Default Re: Spectrum Analyser TR4172

Made up some sane-length RG400 N to SMA cables today - about a meter each. Perfect for the bench. This certainly answers the question as to whether an unknown SMA cal kit is better than a known N cal kit with unknown N to SMA adaptors at the end of an eight meter mediocre-at-microwave-frequencies cable. I'm almost ashamed to admit that it is merely the little calibration standards that came with this $1.98 NanoVNA I got to play with.
This is the IF input before adding terminators.

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Much more sane than the same measurement from post #46 and #75.

Oh, just an FYI, you are evil, Jeremy. You've got me eyeing a real SMA Cal Kit from Dr. Kirby. It would cost about as much as I already have in the VNA.
Can I please tell my wife that YOU made me do it if I end up purchasing it?

Lex, that reminds me that I still have to look at some component date codes on mine. Being that it's a Takeda Riken branded TR4172, it wouldn't surprise me if it was one of the first ones to roll off of the assembly lines.

73,
Matt
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