Audio output trafo - 4,3kohm - 60w Designed for push-pull tube output circuits. Enclosed (shielded), 4 slot, above chassis Type "X" mounting. Frequency response 30 Hz. to 30 Khz. at full rated power (+/- 1 db max. - ref. 1 Khz) minimum. Insulated flexible leads 8" min. Manufactured with plastic coil forms for coil support and insulation. Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output. Due to the unique interleaving of the windings BOTH secondary windings must be engaged to meet specifications (see hook-up diagrams below). For the "ultimate" in Push-Pull output see our line of epoxy potted output transformers. ¶1645 Only Secondary Connections (Due to the unique interleaving of the windings BOTH secondary windings must be engaged to meet specifications) To hook up 4/8/16 ohm secondary loads - see schematic (do not use the white wire). To hook up secondary to 70V loads, jumper Blk/Yel wire to Grn wire. Connect load to Blk and White wires.