Re: [TCML] Capacitive Discharge Pulse Mode with my VTTC

[Futuret <futuret@xxxxxxx>]

 Roger,

Thanks, I see how you have it set up, that's an interesting approach.  
Have you looked at the RF waveform on a scope to see if it ramps
up nicely?  Just an antenna type scope pickup should be OK.  

Cheers,
John

 


 

 

-----Original Message-----
From: Roger Smith <rwsmith@xxxxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Thu, Sep 8, 2011 9:37 pm
Subject: Re: [TCML] Capacitive Discharge Pulse Mode with my VTTC


On 9/7/2011 5:23 PM, Futuret wrote:

> Roger,

>

> Nice work.  It's not clear to me exactly how you applied the extra energy from 

the

> capacitor and series choke to the tube plate... how the SCR was arranged 

circuit-wise to feed in

> this energy?  Do you have a schematic available or a more thorough description

> of the circuit?

>

> Thanks,

> John

>

>

>>

John,  here is a link to the circuit 

diagram...http://www.flickr.com/photos/29248051@N02/6128920446/in/photostream


    It is fired in much the same way as a VTTC in staccato mode with an 

SCR in the cathode circuit.   Once it is triggered the charging 

transformer has to be turned off on tell the capacitor discharges so the 

SCR can turn off.   Then the charging transformer is turned back on and 

after about half a second the SCR is triggered again.    One pulse per 

second is the fastest rate I can do so far.



Roger

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