As I said, I can't find the data. The N2PK was an early version which I did not
add USB to so I ran it on an old Toshiba laptop with WinXP and a parallel port.
I broke it out and fired it up but no data to be found. I probably saved it on
a floppy disk. This was 10 years ago and I've lost a wife and had a number of
issues since then so memory if foggy.
The Boonton is long gone due to downsizing. I have the N2PK still but have
moved on the the DG8SGQ analyzer.
The photos I took were of a general nature and not necessarily the final
measurement configuration, so reliance on them is a dubious proposition.
There is a plethora of papers and messages by the likes of N2PK, N6RK, DG8SAQ,
OZ7OU that examine these types of measurements in detail.
Another fun and slightly related paper is here:
http://www.tuks.nl/pdf/Reference_Material/David%20Knight%20-%20The%20self-resonance%20and%20self-capacitance%20of%20solenoid%20coils.pdf
Wes N7WS
On 10/11/2017 11:04 AM, Jim Brown wrote:
On 10/11/2017 6:46 AM, Wes Stewart wrote:
With a decent vector network analyzer, the ports are already well-known (50
Ohm) terminations. If the round robin you mention was in the July 2007 time
frame then I was a party and measured the device using both my N2PK VNA and a
Boonton RX meter. I have pictures of the setups, but alas can't find the
data. I got some feedback that you said of my measurements, that they were
"dead nuts on." :-)
Hi Wes,
Yes, that's the round robin I was referring to. Although my memory of it was
that the Boonton data was spot on, while other data was not. But since you did
it, I'll trust your memory over mine. :)
If your VNA data did closely match the Boonton data, we should talk off list
about your setup of the N2PK VNA, which is well known to be a fine unit. I
certainly would like a method I can trust that is a lot less work than the
voltage divider method.
73, Jim
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