Re: [TCML] SSTC help

[Rob Byron <mustang_5l87@xxxxxxxxxxx>]

Anyone got a cheep scope for sale? This would be my first problem as I'm new to electronics and don't have a scope. 

Rob. 

________________________

On 2009-10-14 12:14:39 -0600 John Forcina <forcijo10@xxxxxxxxx> wrote:

> 
> Yes.  I am also very curious to see sparks from DC Cox's systems.  I have
> been hearing a lot about how good they are and i am just interested in some
> more spark pictures and/or more info.
> 
> On another note in regards to Rob's SSTC,  Can you provide us with some
> scope shots of your gate waveforms or your feedback circuitry etc...?  From
> my personal experience with that coil it does not like being ran with a
> topload.
> 
> On Tue, Oct 13, 2009 at 11:11 PM, Dr.Hankenstein <
> dr.hankenstein@xxxxxxxxxxxxx> wrote:
> 
>> Show me the sparks!
>> 
>> H
>> 
>> -----Original Message-----
>>> From: DC Cox <resonance@xxxxxxxxxxxx>
>>> Sent: Oct 13, 2009 4:59 PM
>>> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
>>> Subject: Re: [TCML] SSTC help
>>> 
>>> If your igbts are not phased properly one may be slightly turned on while
>>> the other is slightly off.  If you don't phase them properly they will
>> blow
>>> is short order.
>>> 
>>> Also, check for high frequency ringing which is a killer.  Proper
>> filtering
>>> with inductors or caps can eliminate this problem.
>>> 
>>> The system of feedback you use to keep the pri circuit in tune with the
>> sec
>>> circuit is also critical.  Solid state components work great but will
>>> absolutely not tolerate much range as will the spark gap type oscillators.
>>> 
>>> I hope to have a set of boards populated and ready for sale this winter.
>>> Right now they are working great running with Powerex CM300s on our test
>>> coils.
>>> 
>>> Dr. Resonance
>>> 
>>> 
>>> 
>>> 
>>> On Mon, Oct 12, 2009 at 9:13 PM, Rob Byron <mustang_5l87@xxxxxxxxxxx>
>> wrote:
>>> 
>>>> Hello, I have been working on my first solid state coil for a good part
>> of
>>>> a year and after many blown components and hours searching the net, I am
>>>> stumped. The coil I am working on is of Steve Ward's mini sstc. I used
>> eagle
>>>> to etch a board to replace the crappy proto type board. This gave me
>> better
>>>> results ( my UCC's don't fry anymore :) I put an LED on the output of
>> the
>>>> interruper to make sure that works. My gate drive IC's make a high
>> frequency
>>>> buzz. Not sure if I should be able to hear that? But it leads me to
>> believe
>>>> they work. My half bridge is on a variac, rectified and filtered. I get
>>>> 170VDC at full power on the bridge. But I can't get breakout?? I did try
>>>> swapping the primary leads to get 180* out of phase. Here is a link to
>>>> video.     http://www.youtube.com/watch?v=kX7oV9iC0Jo
>>>> 
>>>> Thanks in advance for any help.
>>>> 
>>>> Rob.
>>>> 
>>>> _______________________________________________
>>>> Tesla mailing list
>>>> Tesla@xxxxxxxxxx
>>>> http://www.pupman.com/mailman/listinfo/tesla
>>>> 
>>> _______________________________________________
>>> Tesla mailing list
>>> Tesla@xxxxxxxxxx
>>> http://www.pupman.com/mailman/listinfo/tesla
>> 
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxx
>> http://www.pupman.com/mailman/listinfo/tesla
>> 
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
> 

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