JAN 5963 / 12AU7WA
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Restoring a 1956 German TV. In a previous attempt by another tech, a Sovtek 12AU7 had been fitted to the Synchroguide hor osc. Very poor performance. A Chinese 12AU7 was no better. This 12AU7WA nailed it! Sets up perfectly and fully drives the line output tube!
The RCA Synchroguide circuit was designed to use a 6SN7 and the 12AU7 is pushed to its limits in this circuit.
reviewed by: Ian Robertson