Siegfried Jackstien 2021/02/07 00:22
and you did that well ... a perfect step by step procedure for a newbie :-)
having a bunch of measured data sure is good ... so if you can make ONE
table from your tests that would be superb (cm and dm together) ... as a
third row maybe measure inductance?!? cause the series inductance is
what dampens the common mode current (as we all know a coil is an rf
then you can have a rough idea what chokes do what ... have an idea how
many turns to use (depending what donut you find in your junk box) ...
at best an excel table ... cause that can then also brought to a
diagramm (a picture tells more then thousand numbers in a table)
when you measure a choke (dm or cm value) ... you can then see the sweep
from 160m to 10m with saver (or other soft) ... but when you have the
table with a dozen chokes ... and convert that in excel ... you have a
"sweep" for all chokes in a single view
just an idea from a dumb nut :-)
a nice picture of "a few dozen" chokes on this page (scroll a bit down)
.... and on the bottom end ... a similar test jig like you used :-)
some more info?
Am 06.02.2021 um 22:31 schrieb David Eckhardt:
> Both were aimed at the newcomers as step-by-step procedures to help
> get used to using the NANOs and not be afraid of making a mistake.
> It's such a useful instrument, I'll do about anything to encourage its
> use! Personally, it belongs in every ham shack and as valuable as a
> DMM. It should also find its place in every EE lab in the
> universities - just my opinion.
> I also have the data from a number of chokes I wound on various
> materials. I've sent that out previously, but I've added to it for my
> own reference. Siegfried, do you think that would be of any value to
> the group as well. It presently is not in PDF format, but I could
> convert it if you believe it would be of any aid to this group.
> Dave - WØLEV
> On Sat, Feb 6, 2021 at 10:23 PM Siegfried Jackstien
> <mailto:firstname.lastname@example.org>> wrote:
> to compare chokes (when you have made a few and want to see what
> is best for what appication) ... maybe put both values in one table?!?
> you made one file to measure cm loss (common mode attenuation) and
> one file to measure trough loss (differential mode attenuation)
> ... to see what choke is best it would be good to see both values
> in a single file (table)
> but all overall ... GOOD WORK...WELL DONE
> (i do know how to measure these things but it is a perfect write
> up for a newcomer!!)
> dg9bfc sigi
> Am 06.02.2021 um 22:00 schrieb David Eckhardt:
>> It was requested by a number of responders that I convert to
>> PDF. The attachments are in .PDF format which should be able to
>> be read by everyone.
>> There was also a request to place them in the files section of
>> these NANOVNA sites. I am a member and will attempt that.
>> However, if the moderators don't see them there, please place
>> them there.
>> Dave - WØLEV
> *Dave - WØLEV*
> /*Just Let Darwin Work*/