Inductance meter

[dotneck335]

That Bourns coils are only 12x12mm; but I am thinking or perhaps the RLB1314-101KL might be better. It's 100uH but its Q of 70 was measured at 796K Hz----much closer to the operating frequency of the LC100 meter. Hmmmmm......

 

[gentlevoice]

@dotneck335:

That is the very one I am going to use---it's 47uH (like the original MingHe), and its ultra-high Q of 90 should work very well.

Thanks for the feedback (also with the 100uH inductor). I am just considering which way to go in this ...

Cheers ;-)

Jesper

 

[dotneck335]

Here's what I ended up ordering:
L1 Murata 22R104C 100uH 10% 670mA Q=90 0.39 ohms $0.59 6.5D x 8.5H
C12 Vishay MKP1837410011 0.1uF 1% 100v PP L7.5xW9xH11xLS5 $1.53
C14 Kemet PFR5102F100J11L4BULK 1000pF 1% 100v 85c L7.2xW6xH4.5xLS5 $1.01
Has anyone found a suitable CASE for the LC-100?

 

[dotneck335]

OK, I found a site that has models for LC100-A cases that can be made with a 3-D printer:
▷ lc100 meter case 3d models 【 STLFinder 】
Now, who out there has a printer that can make a few for our gang?

 

[Mark Johnson]

Maybe this is the excuse you've been searching for, to buy a 3D printer for yourself.

 

[dotneck335]

I don't need an excuse.......just the MONEY!!

 

[dotneck335]

Checked the METHOD printer----$4,000 and up! Too rich for my blood!!

 

[nigelwright7557]

A very cheap option would be to use a capacitor in series with your inductor.
A resistor in series too.
Apply a sine wave sweep and see what frequency you get minimum sine wave across LC.
Work back from f=1/(2pi root(LC))