Karl Lindheimer's mini coil:

Name: Karl Lindheimer

Address: Warren, NJ USA

Email: karl@
coolbluesky.com

Category: 2

NST: 7.5 KV Franceformer 20 ma. Model # 7520W

Actual NST secondary short circuit current: 17 ma. @ NST Primary Voltage: 95 VAC (Variac)

Primary: Flat spiral wound 10 Ga. copper 12 turns, tunes at turn 9

Secondary: 9.2" 32 Gauge magnet wire, close wound 2" diameter

Spark gap: Static - (2) 4" x 3/4" copper pipe segments, no air cooling.

Cap: MMC (10) .056 uf metallized polypropylene pulse caps with 10 meg resistors.

Top Load: 6 pf aluminum covered sump-pump tubing in toroid shape 6" x 2"

Safety system: dual NST secondary to ground safety gap. Fires occasionally.

Also has 2 air wound choke coils.

Unit has operated for many 30 minute cycles continuously with no problems. I use it to test my lightning detector circuits, etc.

Tested: 95 VAC Secondary voltage 5700 @ 17 ma. Max streamer 8.1 inches VA 96.9

Tested 125 VAC Secondary voltage 7500 @ 19 ma. Max streamer 8.75 inches. VA 142.5