High-pressure small choke coil for tube amplifier. The inductance is about 2.5H, the current is 60mA, the copper resistance is 113 ohms, and the EI 35X15mm iron core is wound.

High-quality Z11 iron core winding, iron core size: EI35mm stack thickness 15mm, sheet thickness 0.35mm, fixed with saddle clip. The oxygen-free copper enameled copper wire is wound, and the E piece is inserted in the paper gap. Outer dimensions of choke coil: 37x32x32mm. Two fixed hole spacing 45mm.

This inductance design center taps three terminals. If you want a low-ripple power supply, but don't like to use electronic voltage regulator or filter circuit, if the volume is not too large, this double-coil choke can form a CLCLC rectifier filter form, and the waveform is smooth , Not a spike. It has more advantages than single-coil chokes and is worth a try.