Found three NEW/NOS, ror sure sure the two in matching boxes with matching lot numbers have never seen a tube socket (hopefully they work).
WE 275A appears from the data sheet to be a 5V 2A3 (or very close?).
Have NO idea why I bought them but at one time way back in the day I had a DIY HIFI Supply 300B kit that could also use 2A3s with modification so maybe?
Sweet looking single-plate tube.
I've tried about everything. WE 300B (Charlie Whitner's first go), EH Gold which came with the kit, and even a low voltage/power version of the 300B (AV-8B) with blue glass made back in the day by Alesa Vaic of AVVT fame.
All good/great sound, LOW distortion, ZERO noise, but...
Every upgrade reveals a bit more clarity and detail but that 'euphoric' tube sound is nowhere to be heard.
Still haven't done the stepped pot part of the last mod I bought as I really need a balanced pre.