Re: [TCML] K-value? - was: New pic of 60ma coil with suggestions applied

[Yurtle Turtle <yurtle_t@xxxxxxxxx>]

I just wanted to point out that the procedure assumes you are using 120 volts. If you are using 240 volts, you will need to use a 240 volt load. If you don't have one handy, you could series two 120 volt hair dryers.

Adam

--- On Sun, 9/28/08, bartb <bartb@xxxxxxxxxxxxxxxx> wrote:

> From: bartb <bartb@xxxxxxxxxxxxxxxx>
> Subject: Re: [TCML] K-value? - was: New pic of 60ma coil with suggestions applied
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Sunday, September 28, 2008, 10:58 PM
> Hi Steve,
> 
<snip>

> You can also measure coupling:
> 
> I've pasted a procedure from Terry Fritz back in
> September of 1998 
> describing the method I personally use. I've used this
> method since and 
> it is easy and accurate.
> 
> I do recommend either a hair dryer or a heating element in
> water. You 
> want the current and volts to "not" fluctuate
> (you want the resistance 
> to stabilize). The water method works, but water adds to
> the danger. I 
> like the hair dryer method. To put the hair dryer in
> series, one of the 
> plugs terminals goes to hot, the other terminal to the
> primary. Of 
> course to measure current, a meter goes in series with the
> hair dryer 
> and primary also. The hair dryer is easy and accurate. Let
> the hair 
> dryer stay on for about 30 seconds then take volt and amp
> readings. The 
> blown air across the heating element naturally balances out
> the current 
> through the heating element and it's an easy and handy
> tool that most 
> have on hand. I've tried "many" ballasts for
> this measurement (including 
> a 3000W resistor) and nothing was as stable as a simple
> hair dryer.
> 
> Anyway, if you do measure, be careful as when current is
> flowing, the 
> primary is live with 120Vac. Several coilers have made the
> measurements 
> many times. Even though I "know" the program is
> correct, I still like to 
> do the measurement on a new coil as a cross check.
> 



      
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla