All our transformers are custom made. They include the audio, auto, balun, ballast, class 2, coils, converter, CRT, current sensing, data bus coupling, differential, encapsulated, flyback, high frequency, high voltage, hybrid, IF, interface coupling, inverter, isolation, instrument, plug-in, pulse, low frequency & low voltage, magnetic amplifier, matching, microphone, mixing, modem/coupler, modulation, power, pulse, ratio, RF, split bobbin, switching, telephone coupling, three-phase, toroidal, transistor, variable, wideband….etc