[Prev][Next][Index][Thread]

Re: Quenching Question




From: 	Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: 	Wednesday, September 03, 1997 7:59 PM
To: 	tesla-at-pupman-dot-com
Subject: 	Re: Quenching Question

Hi Julian,

> From:   Julian Green[SMTP:julian-at-kbss.bt.co.uk]
> Sent:   Wednesday, September 03, 1997 11:45 AM
> To:     tesla-at-pupman-dot-com
> Subject:    Quenching Question
> 
> Following my attempts to get scope shots of my coil (images comming Malcolm)
> with and without spark breakout I am wondering the reasons for good quenching.
> 
> I have proved that fast quenching increases spark length - but why?

It is exactly the other way around according to my observations :) A 
well connected spark drains the energy *fast*. An air streamer causes 
Q to remain fairly high and hence the trades can continue. 

> When the spark gap fires it connects the cap and primary to form a tank 
> circuit which generates the RF.   The secondary starts to ring as the energy 
> in the primary circuit transfers to the secondary.   The amplitude of the 
> secondary builds until output spark forms and energy exits the system.
> 
> For all this to happen the primary tank circuit must remain connected (spark
> gap not quenched).  Quenching the spark gap too soon will prevent generation
> of primary RF.   On my coil the peek in secondary RF comes after 3-4 cycles
> and if sparks are allowed the secondary RF is killed at this point.  Any 
> events that occur after we simply don't care about, or do we?

I don't. 

Malcolm