DeArmond Tube Amps:

In 1959/1960, seven amplifiers using vacuum tubes (thermionic valves) were introduced under the DeArmond name.  Four of these were branded as CF Martin as follows:

DeArmond Model R5                  – CF martin Model M110

DeArmond Model R5T               – CF Martin Model M110T

DeArmond Model R15                – CF Martin Model M112

DeArmond Model 15T                – CF Martin Model M112T

DeArmond Model 25T               – No CF Martin equivalent

DeArmond Studio Amp             – No CF Martin equivalent.

DeArmond’s own manufacturing records refer to the CF Martin amps and a brief examination of the products clearly shows this to be the case.

CF Martin separately commissioned a series of transistorised amps from Allen Organ, a company in Lehigh Valley, Pennsylvania.

A schematic diagram and instructions were supplied with every DeArmond and CF Martin amp.  An interesting feature of some tube amps sold under both DeArmond and CF Martin brands was the inclusion of a number of electronic components in one or more maroon-coloured resin encapsulations.  These items were called ‘Erie Packs’ by the employees and were most likely included to prevent copying of the circuits by rivals.

An Erie Pack can be seen in the schematic diagram below, marked EP-9097, with ten numbered connections exiting from it.  The item itself can be seen in the lower centre of the amp chassis in the rear view of the amp.

Three such resin encapsulations can be seen in this photo of an R15-T amp.

CF Martin Tube Amps:

These were as standard DeArmond models with cosmetic differences only, including a different baffle material, black fabric covering, a chrome control panel and black knobs:

DeArmond Solid-state Amps:

In the 1970s, whan Steve Tosh managed the company, it began producing a range of solid-state amplifiers and speaker cabinets for guitars, basses and PA: