The state of the Tesla
coil, this time, was as follows:
- Power supply: Neon sign transformer 9kV/100mA, fed via variac 10A
- Protection Filter: 2 x (47mH+3kOhm) and 1nF bypass cap // NST
- RQ-gap with 5 active gaps only, corresponding to 3.5mm gapwidth.
- Capacitor: 16.8nF double layered epoxy-PCB in transformer oil
- Primary: 15 turns 30deg. saucer (L ~90uH), tapped at 9.5 turns (L
~ 20uH)
- Secondary: D=12cm (~5"), H=58.5cm (23"), 921 turns (L ~19mH)
- Top terminal: dia.=25cm silver-plated metal sphere, 9cm above coil
- Resonance at 275kHz (secondary: 373kHz without top load)
- Input power not mesured
- Sparklength: within range of 0.5m...0.65m ( 20"...25" )
Click for circuit sketch
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