The simple SE-amplifier..
The simple PP-amplifier. (Pay attention!)
High-quality, full balanced PP-amplifier.
Electronic Attenuators.
Tube Voltage Regulators.
The balanced amplifier with low noise.
Low frequency amplifier circuits.
The balanced amplifier with low drift.
Measurement of the tube characteristics for a positive grid potential.
The amplifier with cross coupling of stages.
The broad-band, differential amplifier (0 - 10 MHz).
The noise level measurement of a tube.
Regulable source.
The stabilized bias source.
DC Amplifier.
The Economic, Direct Coupling Amplifier.
Peri-50 Power Amplifier.
Peavey Power Module