Yes, folks!
Serge did it, again... I admit the seed of curiosity was already there, but last time I met Serge and I delivered him a pristine Technics RS 1500 US open reel tape recorder, he simply shined when he read on user manual it was OK to be used with 24V PSU!
Some months passed and...
Now Serge is ready to deliver his own open reel battery fed stage to the world!
WOW!
Stay tuned.