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In Reply to: Re: That one! posted by Barossi on March 21, 2007 at 00:27:00:
It was 6H30 PP led biased (1 common LED for both the valves) loaded with a LL1660PP. Quite simple. The other option was with a 9V battery connected to the CT of the input transformer (cathode of 6H30 to ground).
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