• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Output transformers in series to simulate center-tap for push pull

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trobbins

trobbins

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Joined 2009
dalmura.com.au/projects/amplifier.php
A few people have built guitar amps using mains transformers (0-15-230V to 6 or 9V work well) for the OT and found they perform pretty well in that application, with no noticeable compromise.

That application is always on the lookout for cheap diy part alternatives. Another common 'cheapie' solution used is a 30VAC output PT with 15 and 24V taps and 2A rating - a multiplier is used to nicely provide usable B+ for 10-20W amps.
 
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