(IRF) 3D1220 RF coil. 12 µH, 8 gauge wire. 4 flutes. Each end has 4 tapped holes for mounting vertically. 3.21 t.p.i. 3" c-c coil. 5.6" coil. 18 turns. 6-7/8" overall. New, old stock from 1944.
Ceramic Coil
1.398 mH
(IRF) NL60084-3 Surplus RF coil measures 1.398 mH end
to end @ 100 KHz with taps @ 1mH and 81µH.
$55 each - $49 (3+)
$15 each
Ceramic Coil Form
120 µH - 2-1/2" O.D.
(ICF) L111 Glazed ceramic 2-1/2" diameter
x 8-1/8" long
coil form wrapped with 14 gauge enameled wire for a total inductance
of 120µH. The original wrapping
was a 1956 Detroit newspaper.
Ceramic Coil Form
2.44 mH - 3" O.D.
(IRF) 3D2440 Ceramic 3" diameter x 12" long coil form (with 1/4" thick walls!) close wrapped with 20 gauge enameled wire (38 t.p.i.) for a total inductance of 2.44 mH. Terminal bolt standoffs only core penetrations.
