Triwec 12676 VM Power Transformer 360-0-360 / 6.3 / 5V Tested 6L6 5Y3 Tube Amp Vintage 1962 Black Ir

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 1962. Weighs 3 lbs 15 oz. Bolt spacings 66 mm by 50 mm.

The much more common 12676-1 is also available for a discount relative to this model.

This transformer originally provided heater current and high voltage HT B+ for 4 12AX7, 2 12AU7, 6AF6G magic eye tube, 6L6GB (or 7591) power tube, and a 5Y3GT rectifier tube in a Voice of Music amp. You can make a push-pull 6V6 5E3 Fender clone amp out of this, or a 6L6GC SE amp.

Here are the verified connections for this transformer. A list of Sound By Doc standardized color codes can be found below:

Input 117 VAC

outputs:
red pair 720 VAC @ 60 mA, center tapped with red/yellow (other sellers quote this as 800 VAC - they are probably measuring under no load)
green to green/yellow pair 6.3 VAC @ 4 A, center tapped with green/yellow
yellow pair 5 VAC @ 2 A

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 use as an isolation transformer or tubes with series heaters, purple 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.