845 20W A1 class monotriode amplifier

Posted on Jan 20, 2013

This project is finalized, that means it is no longer experimental. This amplifier, altough limited in output power (20W), has been designed to give the best listening pleasure. No compromise has been made during components choice: the 845 output triode is one of the best tube available today in that range of power for single-ended applications, the driver stage uses a 300B, a long revered audio tube (note that you must use a WE 300B or a Sovtek 300B).

845 20W A1 class monotriode amplifier
Click here to download the full size of the above Circuit.

This technical choice has been made in some commercial (like Marantz T1) or amateur realisations and can be questionnable since the 300B is itself difficult to drive. Nevertheless, the exceptional transparancy of the 845 makes the driver stage proeminent

Leave Comment

characters left:

New Circuits



Popular Circuits

50 Watt Amplifier
Detection systems in PET
The 146.460 MHz Repeater
Compact DJ Station
LED Driver: 6 Channels with Phase Shift Control
SCA broadcast receiver circuit diagram
Dual timing circuit thyristor control table
Simple delay lamp circuit 1