"The Model 132A is a high quality pulse generator - at a low price - which will fit every need for a laboratory pulse generator. The Model 132A is capable of providing up to 1 amp peak output pulses with an extremely broad range of pulse widths and delays. Adding to the versatility of this instrument are the high pulse repetition rates of which it is capable.

Rise times are fast, and, for added flexibility, there is a front panel control to slow the rise time for special applications. Every care has been taken to eliminate overshoot and ringing. A regulated power supply insures freedom from jitter and pulsetop ripple." (E-H, Catalog, 1972)

BRIEF SPECS

The E-H 132A is a mixed transistor and tube design. Many instruments of this era used transistors in 'easy circuits' like the power supply. E-H did it vice versa. They used a conventional tube scheme in the supply and transistors for all timing circuits. Only the output amp relys on a high quality tube (7534). The design was launched in 1962 and still found in the 1970 catalog as a low cost instrument. Comparison of the early manual and the catalog shows that E-H added the double pulse feature later. Pulse generators were very popular in the sixties and seventies, as most design work and research on digital circuitry and core memory required such signals.

My E-H 132A has renewed side chassis, top and bottom panels. The instrument worked fine except the internal rate generator produced much of jitter caused of much ripple of it's supply. The problem was fixed with replacing a bad electrolytic can capacitor in the power supply. To conserve the interior look I operate a new capacitor within the old can (which was a really awful job).