Woodward Schumacher 12522-8 Transformer 390-0-390 / 6.3 / 5 V VM Vintage Power Tested Tube Amp Project 5Y3 1961

Fully 60 Hz AC tested and guaranteed vintage tube preamp 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 USA in 1961 by Woodward-Schumacher for VM. IEA date code 606133. Weighs 3 lbs 7 oz. Bolt spacings 65 mm by 50 mm. Quantity sometimes available - please enquire.

This transformer originally provided B+ and heater supply for these tubes: 3 12AX7, 6V6, 5Y3, 6SN7

Here are the verified connections for this transformer:

Input: 117V

Outputs:
780 VAC center tapped
6.3 VAC
5 VAC

Unlike the 12522-6, this one does NOT have CT on 6.3V.

We use a standardized wire identification scheme featuring bright cable ties. In case of any ambiguity, 117V input will be wrapped with a black cable tie, red is high-voltage, yellow is 5V for rectifier, green is 6.3V, blue is 12.6V, white is 117V out for 220V input or tubes with series heaters, purple or grey is a second (or third!) 6.3V output. The voltages run a bit higher when run at modern AC levels instead of the 117 VAC that was specified in the 1950s and 1960s. Serial number T-V522-8.