G'day, Jerry.
Nice to hear from another N2PK user.
Your instrument looks very good;
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I have a VNWA as well, but I still use my N2PK occasionally; it can provide a "sanity check" if a VNWA measurement gives unexpected results, although I know that " ... a man with two watches is never sure of the correct time". :)
I use myVNA; I like it and I think that using it is a tribute to Dave and the work that he put into it.
The N2PK may also be operated with the VNWA program written by Tom DG8SAQ; see here;
See page 36 of the VNWA Help file (available from the above link).
Kerry VK2TIL.
