High frequency emergency fluorescent lamp

As shown in the figure, this is the circuit of the high-frequency lighting generator. It uses 8V~14V batteries as energy, and then lights up 6W~12W fluorescent lamps after oscillation and voltage boost. The crystal triode VT can use low-frequency high-power triodes such as 3DD12A, D3D4D, 3DD5C, 3DDl5A, etc. When assembling, it should be installed with a 70mm×40mm×2mm aluminum plate heat sink; the potentiometer RP is best to use a small wire-wound type; the high-frequency pulse transformer T can be made with a ferrite magnetic tank with a diameter of 22mm; the coil L1 is wound flatly on the skeleton with a high-strength enameled wire with a diameter of 1mm for 9 turns; the feedback coil L2 is wound flatly on the outside of L1 with a high-strength enameled wire with a diameter of 0.3mm for 8 turns; the coil L3 is wound flatly with a high-strength enameled wire with a diameter of 0.2mm for 900 turns.