Details of our coil.
If your browser does not support tables you can view the following table as a text file.
| Secondary: | |
| diameter | 3-3/8" |
| winding height | 16-1/2" |
| wire | #24 stranded, plastic coated |
| turns/inch | 30 |
| wire length | 133.3 meters |
| frequency | ~560 kHz --- based on length in free space |
| ~540 kHz --- based on wire propagation factor | |
| discharger | 5-1/2" sphere |
| Primary: | |
| type | Archimedes spiral |
| wire | #8 solid copper |
| inner radius | 2-3/4" |
| between turns | 5/8" |
| tapped | 4-1/2 turns |
| Capacitor | .00866 salt-water (wine cooler bottles) |
| .00865 rolled poly | Spark gap | single - static (8 x 32 bolts, adjustable) |
| Spark lengths | 15" with 1" gap and salt-water cap |
| 19" with 1-3/16" gap and rolled cap | |
| Power supply | two 15 kV, 30 mA neon sign transformers |
| protection | two 2-1/2" diameter ferrite toroids |
| wound ~30 turns #18 solid copper magnet wire | |
| Ground | 1" water pipe ~3 feet in earth (formerly CB ground) |
| wire | #8 stranded ~18 feet in length run into basement |
| Other details | |
| - 20 amp Variac - no safety gap, as we are still under 1 kW | |
Here is the coil schematic.
Go to my home page.
Go to the electronics file area.
Go to the Brooke High School home page.
Click here to send Email to Luke Mester