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Re: Measuring k




From: 	Julian Green[SMTP:julian-at-kbss.bt.co.uk]
Sent: 	Wednesday, September 17, 1997 7:54 AM
To: 	tesla-at-pupman-dot-com
Subject: 	Re: Measuring k

> 
> k = 1/(2 x T x Fr)  where T = time taken to ringup (half a complete 
> beat hump). The formula is an approximation for the lossy case.
> 
> Also approximate:  k = (Fhi-Flo)/Fr   where Fhi and Flo are the two 
> sideband responses you can see when running the primary from a signal 
> generator and monitoring the two response frequencies on a scope.
> 
> Malcolm

k = 1/(2 x T x Fr) 

T is time of full beat hump
Fr is Frequency in Hz

The 2x is needed to split the full beat hump in half to the point of 
full ring up voltage, and T x Fr gives the number of cycles.

By observing the wave form on a scope the number of cycles needed to 
reach full ring up voltage can be counted so:

              1
--------------------------- = k
NumberOfCyclesForFullRingup

But what is this? k = (Fhi-Flo)/Fr

Julian Green