Re: [TCML] JAVATC & tuning

[futuret@xxxxxxx]

KN,



I often use similar methods.  I put the ruler against the windings as you did,
but then i hold an instrument such as a pen point against the winding, and
slowly drag it along the winding such that I feel each wire "bump", as I slowly
move the pen.  I count the bumps I feel, and stop when I've gone 1".  That
gives me the turns per inch.  Of course my method won't work if the secondary
has a smooth coating over the windings.  Another method I use is to put the
ruler against the windings, then move the pen along the winding slowly, but
instead of feeling the bumps, I observe as I pass each wire turn using a
magnifying glass, and I count the turns that way.  

Cheers,
John


-----Original Message-----
From: andrew <andrew@xxxxxxxxxxxxxxxxxxxxx>
To: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx>
Sent: Tue, Apr 13, 2010 11:20 am
Subject: RE: [TCML] JAVATC & tuning

Hi 

My first coil isn't finished yet, but I used the following method to

calculate the number of turns I had on my secondary. As I am using recycled

wire from the stator of an electronic washing machine, I had no wire data

other than direct measurement of the thickness of the wire by micrometer and

that was a bit dodgy. Instead I got an engineers' scale rule and laid it

against the secondary winding and took a photo with my digital camera. I

then put the image on my pc and zoomed it up and counted the number of turns

that coresponded to 10cm of the rule. That gave me the no of turns per cm

and based on the length of my coil, I calculated I had 999 turns. About

right!

Kiwi Newbie




 
 
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