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 Sophia Electric best 2A3 output transformers for Western amplifier 2A3 300B 50 (#172380534780)US $169.99View Item
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 Sophia Electric 3K output transformer for Western Electric 300B 2A3 45 amplifier (#172363898065)
US $475.00
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Price is for one potted power transformer for KT88 pushpull mono-block amplifier.  I have two available.

From my unfinished project, vintage 2005 production high quality power transformers for 300B/50/811A pushpull amplifier or KT88/6550 pushpull amplifier.   Also suitable for 845 211 single ended amplifier project.  250W power transformer with:

Primary US AC voltage
Secondary: 420V-0-420V 180ma per arm x 2(about 400ma), 6,3V4A 6.3V2A 

Suggest for:

KT88/6550/807 pushpull 
or Chock input for 300B PP amplifier. 

I planned for a PushPull amplifier project but have not yet started.  It is time for the next DIY'er.