2 Beyer Input Transformers MC Step-Up/Mic Tube Preamp

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's a pair of Beyerdynamic input transformers model TR/BV 370 215 006. These transformers are identical to the metal can leaded Beyerdynamics I've been selling on ebay, but just in a plastic can with solder pins rather than wires. The exact same mu-metal can is encapsulated in the plastic container, with the same wires coming out to terminate on the solder pins. These have a step up ratio of 1:15, a secondary load impedance specified for 45,000 ohms and a split primary so that they can be wired for an input impedance of either 50 or 200 ohms (30x or 15x step up respectively). With the 45,000 ohm secondary these work very well as moving coil step-up transformers. The 2 available ratios make them usable with a wide variety of cartridges. They're especially popular with the Denon 103 series. They give a very clear, detailed sound, without seeming to either add or remove any low end warmth. Extremely nice, well behaved little transformers, and their small size is well suited to the very low output power provided by MC cartridges.Of course these also work well as microphone input transformers for either tube or FET (discrete or opamp) input preamps. I'll provide the high bidder with a diagram of the transformers, and I'll also be glad to help you with whatever information you might need to get them properly wired for MC step-up. I'll also read more

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