THESE AMPLIFIERS ARE BUILT AFTER THE ORDER
THE DELIVERY TIME IS ABOUT 18-24 WEEKS
The amplification circuit of this machine is very simple.
Only one step is used by considering the pentode C3m of the vintage vacuum tube by German Siemens as pentode connection, and the moderate amplification rate and the highest quality are pulled out.
A negative return was not used for the circuit but the simplest and natural non-feedback system is adopted.
If a negative return is used, performance will become good, but sound becomes unnatural in many cases.
The number of the parts to pass is reduced to a limit, and degradation of sound is suppressed to the minimum.
The screen grid circuit and the plate circuit were used as another power supply in it, and the output as big as about 1W has been obtained by speaker load by constant-voltage-sizing a screen grid circuit.