I wrote

> compared with my layout. So, I've re-orientated the transformer
> (at this stage by simply putting it on the underside of the PCB) so
> that the common is to the tube trigger, not the 0V rail where it was

Sorry, typo. The common was previously on the tube trigger, now
it's on 0V where it belongs. The hot end of the secondary is now on
the tube

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