Jennings (JEI) PA100 with reverb

1973 - 1975

Page from the catalogue of late 1973.

Below on this page, material relating to the later Jennings PA100, purple livery, late 1973, likely to be a Jennings design as a circuit diagram survives, drawn by Albert (Bert) Hogben, who had worked for Tom in JMI days.

As mentioned elsewhere on the site, versions of the purple PA100 were also marketed by Colorsound and Fal. Perhaps some reciprocal agreement?

In one of those high ironies, the reverb pan fitted to the JEI PA100 was a Hammond. In the 1990s Dick Denney reported that JMI - probably meaning Tom - was loth to purchase a license and so had developed its own system (based on phono cartridges).

The main overview page on Jennings Public Address amplifiers, 1968-1975, can be found here. Details of an earlier PA100 (late 1969 / early 1970) have a page of their own.

January 2026: further pictures to come

Hammond reverb tank mounted above other assemblies.

A page from the circuit diagram for the JEI PA100 of 1973. A preamp channel.

Main power section board.

Fal and Colorsound