Vintage Siemens Selenium Rectifier B300C200 (300V / 200mA) – Tested & Working, Pulled From Professional Gear – Perfect For DIY Tube Audio

Hey audiophiles and tube amp builders!

Here's a gem for your next project.

This is an authentic Siemens selenium rectifier, model B300C200.

It handles 300V and 200mA and was pulled from professional Siemens equipment.

The seller notes it's used but has been tested 100% and is in good working order.

If you're into vintage repairs or building your own tube gear from scratch, having a genuine German-made component like this adds that classic vibe and reliability.

It's not new, but it's got plenty of life left and that old-school mojo that new parts just can't replicate.

Grab it for your stash or your current build—this is the kind of stuff that makes DIY audio so rewarding.