300B Single-Ended-Triode Amplifier

300B Single-Ended-Triode (SET) Amplifier Project

The DIY 300B triode amplifier shown below was completed by Stamou Tasos (Greece). The 300B triode amplifier was built following the 300B single-ended (SE) tube amplifier schematic by J.C. Morrison.

DIY 300B Single-Ended-Triode Hi-Fi Amplifier

For this single-ended (SE) 300B triode amplifier build Stamou has used premium parts, Lundahl audio output transformers and a DIY chassis. The 300B Single-Ended-Triode (SET) amplifier circuit uses a direct coupled 6SN7 driver stage. The output stage is a SE 300B triode and the maximum power output is about 8 Watts per channel. A pair of reasonably sensitive (~91 dB+) loudspeakers will be required with this 300B SET amplifier.

300B Single-Ended-Triode Amplifier - Point-to-Point Construction

The 300B SET amplifier was built using point-to-point construction. The chassis for the 300B triode amplifier was also built by Stamou. The frame is made from 20 mm thick MDF wood which was finished with spray primer and paint. The top plate is made from a 4 mm thick aluminum plate and the bottom plate from a 2 mm thick aluminum plate. Your enclosure will require good ventilation. "This is a great sounding 300B triode amplifier that I am sure DIYers will find to be very rewarding." For the full 300B SET amplifier project details see the DIY 300B Single-Ended-Triode (SET) Hi-Fi Amplifier project page.