Electronic Components Corporation Webcor 68P052-3 Power Transformer 560 V / 12.6 V 12X4 12AX7 Tube Preamp 1958
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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 1958. Weighs 2 lbs 6 oz. Bolt spacings 50 mm by 43 mm.
A list of Sound By Doc standardized color codes can be found below. Here are the verified connections for this transformer.
Input 117 VAC
outputs:
red to red/yellow pair 560 VAC
brown to yellow pair 12.6 VAC
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.
| Listed | 4 years ago |
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| Condition | Excellent (Used) Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.Learn more |
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