"tickler coil"^^ . "104432785"^^ . "103502281"@en-us . "0"^^ . . "04432785-n"^^ . "tickler coil"@en-us . . . "104261528"@en-us . . "a small coil in series with the anode of a vacuum tube and coupled to the grid to provide feedback"@en-us . . . . . "0"^^ .