I have been working on Crystal filters using old Ex Mod xtals HC6/U from 1960's.
Matching sets using NanoVna and software  from the Web, I have taken a few
screen shots, from my Win10 system running NanoVna_saver V0.3.7 & NanoVna V2_2.

Running well by the looks John well done nice plotting 73 Dave

> On 20 Aug 2020, at 21:17, John Walton via groups.io <johng4frd=blueyonder.co.uk@groups.io> wrote:
>
> I have been working on Crystal filters using old Ex Mod xtals HC6/U from 1960's.
> Matching sets using NanoVna and software from the Web, I have taken a few
> screen shots, from my Win10 system running NanoVna_saver V0.3.7 & NanoVna V2_2.
> <NANOVNA2_2.jpg>
> <8X_XTAL_FIL.jpg>
> <8X_XTAL_S21.jpg>
> <8X_XTAL_DATA.jpg>
> <8X_XTAL_ANAL.jpg>
>