219181 ⎘
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements; Modifications of amplifiers to reduce non-linear distortion in discharge-tube amplifiers
Analog amplification vacuum tube
#2Low voltage tube circuits
#3Single-ended screen-regulated cathode-follower output stage for high-fidelity music amplifier
#4Input/output signals preserver circuit of amplification circuits