Re: [TCML] Spark gap

[Mddeming@xxxxxxx]

Hi Bart, All,
 
How about just hanging a microphone within hearing distance and running it  
through an audio spectrum analyzer or just scoping the mic output it with a  
signal generator on the second channel in X-Y mode?
 
Matt D.
 
 
In a message dated 2/25/08 11:40:07 P.M. Eastern Standard Time,  
bartb@xxxxxxxxxxxxxxxx writes:

Sound is  a viable option. I'll consider that. I'll start with the 
photons first,  but I'll keep that in mind. Not only the pitch which can 
give a rough  guesstimate, but maybe better resolution using sound as a 
trigger, "level"  set of course, but certainly possible. As I've already 
hinted at, I'd like  to measure the voltage drop of each bang across the 
gap (eventually) over  a duration. I'm contemplating the approach to that.

Take  care,
Bart

Scott Bogard wrote:
> perhaps this is a very  inaccurate approach, but, spark gaps all emit a 
> certain pitch  sound.  This is especially noticeable on rotary gaps.  You 
>  could use a tone generator to match the pitch of your spark gap, and 
>  calculate the BPS through the frequency of the sound.  As I said that  
> will only give a rough estimate of the breaks per second  (400ish...).  
> You would probably be better off to put a photo  sensor close to the 
> spark gap, put it through a filter, and measure  the flashes per second 
> with an oscilloscope, as Bart already  suggested.  Just musing.
>


 



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