On Wed, 9 Oct 2019 at 02:04, Kurt Poulsen <kurt@...> wrote:
Hi David
Hi Kurt
Exactly, the supplied open is pretty poor and has high loss. See attached
measurement with the NanoVNA aand NanoVNA saver calibrated with my HP85033C
.
Yours looks worse than mine, and I thought mine was bad enough!
That is why I have not yet published my characterization as I am searching
for confirmation that mine is not a special poor one, and you just
confirmed.
Yeah, it seems there are some dodgy ones around.
I would not even bother to attempt to characterise one with the intention
to share the results, as yours, Rune¡¯s and mine all look physically like
same, but are electrically very different.
It would be interesting to know why they are so bad. I wonder if the
dielectric is paper that¡¯s painted white to look like PTFE!
Kind regards
Kurt
Dave
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...
Telephone 01621-680100./ +44 1621 680100
Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United
Kingdom
