300B Amp Upgrade - Photo journal

300B Amp Upgrade

A little photo journal from a customer of ours detailing their classic 300B amp upgrade project. Also, includes a helpful circuit diagram.

They report in, “Sounds warm and mellow, but makes you sit up and listen, never jarring or shouty. Wonderful piano and voices.”

Specs: 6W. Cathode/fixed bias 51v / 750 ohm / 68mA. 300b plate 415v 25W dissipation. Modern floor standing 2 way speakers 91 dB 6 ohm

Image 3


Image 4


Image 5



Image 6




















Image 7


Image 8

Subscribe to Hifi Collective