Original poster: "Karl L." <karl@xxxxxxxxxxxxxxxxx>
Hi Gerry,
Removing shunts up to a point is allowed. When 1/2 the shunts were
removed, I measured 36.5 mA. @ 117 VAC. The rules (found here:
http://www.laushaus.com/tesla/minicoilcontest/ ) state:
Rules for Category 1
Category 1 is for entries powered only by faceplate-rated 4kV/20mA
NST's. The rules are more restrictive here so that this is the
purist form of competition - everyone starts with the same power supply.
1) The power supply must be a 4kV/20mA NST. Any manufacturer, and
either 120V or 240V mains voltage is okay.
2) NST primary voltage may not exceed the faceplate value, typically
120/240VAC. If your mains voltage is abnormally high, you must
Variac down. If you must overdrive your 4/20 NST, you may enter it
under category 2.
3) Removing some NST current limit shunts IS allowed. Short circuit
secondary current must be measured with nominal primary voltage
applied, and this current may not exceed 50mA.
Take care,
Karl
On Jun 8, 2006, at 10:45 AM, Tesla list wrote:
Original poster: "Gerry Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
That seems like changing the contest. The contest is now a 4KV
38ma contest instead of a 4KV 20ma contest. Is that allowed in the rules.
If so, one may not want to advertise it as 4KV 20ma
Gerry R.
Original poster: "Karl L." <karl@xxxxxxxxxxxxxxxxx>
Hi Dr. R.
Yes, I removed 1/2 of the shunts, as did several others in the
competition. The NST ratings originally were 4kV by 20 mA. Once
the shunts were removed, the mA increased to about 36 - 38 for everyone.
Karl