Re: [TCML] RSG Upgrade Performance Video

[jeremyee@xxxxxxxx]

Gary,
   I think I understand how it switches between the two bps settings. I currently have my RSG set for 240 bps mode (4 stationary electrodes). At the right phase setting two electrodes will be aligned at the peaks of the sine wave and the other two will be aligned at the zero crossings. This will make it operate at 120 bps. 

I like the idea of scoping the waveforms out. I do have an o-scope, so will have to try that the next time I fire it up. 

Also, point taken on the video. I do think that this coil upgrade turned out nicely (both spark output and aesthetics). I had a lot of help from my father and uncle on the aesthetics part! I will have to get my uncle to take a video of the whole setup (he's also the photographer). Thanks for the comments!

Jeremy
Sent from my BlackBerry device from Cincinnati Bell Wireless

-----Original Message-----
From: Gary Lau <glau1024@xxxxxxxxx>
Sender: tesla-bounces@xxxxxxxxxx
Date: Thu, 9 Jun 2011 22:08:15 
To: Tesla Coil Mailing List<tesla@xxxxxxxxxx>
Reply-To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] RSG Upgrade Performance Video

Hi Jeremy,

I can definitely hear the two distinct tones in the video, with superior
performance at the lower one.  But I'm having trouble imagining how the
Freau phase controller could allow one to dial in 120 or 240 BPS.  In my
experience, varying the phase control Variac will vary the spark length from
virtually nothing at an early phase setting, to maximum performance, and
going further (later) will cause the safety gaps to fire and stuff just gets
messed up, timing wise.

If you have a scope, I would encourage you to just put the probe in the
general vicinity of the operating coil and verify the BPS.  You should also
be able to see a relative bang size; see if that varies with the phase
Variac.  It should.

And a general comment about videos.  Everyone values different things, but
to me and maybe others, it's not just about the sparks.  Let's see the rest
of the coil too!

Regards, Gary Lau
MA, USA



On Thu, Jun 9, 2011 at 9:29 PM, <jeremyee@xxxxxxxx> wrote:

> List,
>   I just wanted to share some success with my upgraded coil with my new
> SRSG. It sure made a big difference though I still have work to do. I
> currently am only using the static gap recommended LTR capacitance on my 15
> kV, 120 mA NST powered coil. Operating at 120 bps, the safety gap only fires
> occasionally. By tuning the phase using a Freau phase controller I can
> "switch" between 120 bps operation and 240 bps operation. It definitely gave
> a better output at 120 bps. Here are the videos:
>
> 120 bps hitting ladder, 4 ft arcs
>
> http://youtu.be/xYIN6S5Ai2k
>
> Varying between 120 bps and 240 bps with phase controller
>
> http://youtu.be/QjlH_u--P0o
>
> Thanks a lot!
>
> Jeremy
> Cincinnati
> Sent from my BlackBerry device from Cincinnati Bell Wireless
>
>
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