"The Amplifier Test Clinic" Brochure

Edited in 1962, this brochure described the test configuration and method used to verify the performance of an audio amplifier.

Note that, on page 3, every instrument chosed by "The Amplifier Test Clinic" for its test was Hewlett Packard.

"The Amplifier Test Clinic" Brochure - Page 1

"The Amplifier Test Clinic" Brochure - Page 2

"The Amplifier Test Clinic" Brochure - Page 3

"The Amplifier Test Clinic" Brochure - Page 4

For a better readability, the four graphs of page 4 are reproduced, enlarged, in the four pictures below.

An Ideal Amplifier

A high powered direct coupled transistor amplifier with low distortion at 8 ohms but high and low frequency distortion at 4 ohms

A medium priced transistor amplifier showing power supply and output coupling capacitor limitations at low frequencies, and transistor limitations at high frequencies.

 

A moderately priced tube amplifier before and after replacement of tubes.