Measured inductance on DIY surf PI coil

[6666]

Hi all
been trying to go through my old notes
been trying to find the measured inductance of DIY
coil for ORIGINAL surf PI, I know its in one of the threads but cannot locate the right thread

The specs for the DIY coil seem to be 20 turns, 9 inch or 23cm dia, .5mm wire or #24 awg
any body made a coil to those specs and measured the inductance ?

was it around 230uH ???


thanks 6666

[bernte_one]

try this
http://deepfriedneon.com/tesla_frame6.html

use point instead of comma

the coil should have 300 microHenry +/- 50
my coil a made of 0,5 or 0,6 mm lackered copper wire 23cm diameter in range of 18-24 turns - works all

don´t hit me if i say to much wrong

[6666]

Thanks for the link
I wound up a coil today, 20 turns, 9 inch or 23cm dia, .5mm wire or #24 awg

and tried it on my brand new LCR meter
and it measures 230uH on the meter


Has anybody else done a real life measurement on this coil for surf pi



I have worked out how to use this and will try making one
http://deepfriedneon.com/tesla_frame6.html

[bklein]

See my "Surfmaster PI Pro coax bad" thread. I measured the real-deal surf pi and the pi pro. I know the pi coil is good. The pro coil was water damaged but seemed to measure inductance within reason - I think it just has too high capacitance. Hope to find out this weekend.

[bernte_one]

Has anybody else done a real life measurement on this coil for surf pi

yes every coil a made i measure with lcr meter too. it is close to that what the coil calculator says i linked.
keep in mind the accuracy of meter changes some percent depending to measure range look in manual of your meter. in this low range my has a accuracy of +/- 5 till 10%

can i help you