Telefunken 2380:1 [9500 Ohms] PAIR (2) 40.5108.050-62 Bv/Pv Vintage Output Transformer OT 12kOhm into 4 Ohm Tested Tube Amp Audio 1954-1960

One (1) PAIR fully 1.00 kHz AC tested and guaranteed vintage tube amp output transformer. AC testing using an oscilloscope allows us to find and reject transformers with noisy outputs, which a simple resistance or continuity test will not reveal. Made in Germany in 1954-1963 by Telefunken. No IEA date code found. Weighs 1 lbs 12 oz. Center-to-center bolt spacing is 54 mm, and height of casing is 49 mm. Quantity sometimes available - please enquire.

Using a 10V_pp, 1.00 kHz input to the primary coil, we have verified these connections for this vintage transformer:

The turns ratio (pri:sec) is 49:1, leading to an impedance ratio for the main secondary coil of 2380:1. This winding of the transformer would provide a 9500 ohm load resistance to the tube plate if you hook it to a 4 ohm speaker.

You get one joined pair. Only one pair left in stock. From Typ 97 R2R

Rated at 12kOhm primary and 4 Ohm secondary.


SKU O-T050-62.