[TCML] new pig driven coil
sdbogard at gmail.com
Tue Oct 12 20:48:24 MDT 2010
Just use what you have, mine is a propeller gap and I've had no
troubles running about 2.5kW, I've already ran a coil so long as to eat
away a full 1/8 of an inch in one run, it actually reaches a sweet spot
during the run and begins to diminish as it runs longer (indicating I
need better quenching, which is hard to do using only 4kV.) I'm
actually using brass now as it was what I had on hand at the time and I
never got around to swapping it out for better. If you are concerned
just put a TCBOR (aka Richard Quick) gap in series with a blower, this
will greatly cut down on tungsten erosion and provide top notch
quenching (no pun intended.) Also keep in mind Pigs are much more
robust than NSTs, and you likely don't need to worry about over volting
them (they are tested to withstand actual lightning strikes, so a
slightly wider gap won't hurt in the least.) The other thing is using
an ASRSG you will be firing the capacitor when it is only about 60% full
optimally, so that will actually be lower than what you will get with a
static or sync gap. I've never built a disk gap, too pricey for me!
Best of luck whatever you decide.
On 10/12/2010 10:01 PM, Joe Mastroianni wrote:
> Hi Scott,
> I actually have an ARSG I built with Dayton AC/DC motor in propeller gap format and 8 stationary electrodes. It's a fast, low torque motor that can spin a propeller gap just fine but it's not going to handle a G10 wheel, that's for sure. The thing that has begun to concern me is the erosion in the tungsten with the propeller gap. It's clearly not going to last as long as with the NST power supply. In fact, I'm starting to worry that the gap is going to widen during a run and perhaps cause problems. So far I've only run the thing for 10 secs at a time or so, as I'm still in trial mode.
> So I need a better motor and I need to move to more beefy tungsten electrodes. I'm currently searching eBay, but Any recommendations are appreciated.
> On Oct 12, 2010, at 3:31 PM, Scott Bogard wrote:
>> Hi Joe,
>> ... You simply must build a variable ASRSG (both for learning curve and for performance) unless you are so wealthy you can buy enough caps for LTR on a PIG
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