musicpickups.com

The musical instrument pickups, effects units and amplifiers designed and manufactured
by Harry DeArmond and Bud Rowe and later by Steve Tosh in Toledo, Ohio, from the 1940s to the 1980s, through Rowe Industries Inc.,
H. N. Rowe & Company, Rowe DeArmond Inc., DeArmond Inc. and Tosh Electronics, all of Toledo, Ohio, USA.

Amplifiers

DeArmond Tube Amps:

In about 1960, six amplifiers using vacuum tubes (thermionic valves) were introduced under the DeArmond name:

   Model R5 (photos copyright Kevin Miller)


Model R5T (photo copyright Kirk Higgins)


   Model R15 Amp.  (All six photos of this amp shown here are copyright Real Guitars, San Francisco)

This extract from DeArmond's tube amps catalog shows the control panel layout for this amp.

  This view shows the 'tubes layout' label affixed to the inside lower Left-hand side of the amp's front panel. 

   The 'tubes layout' label also shows the amp's serial number.  This number includes an alphabetic prefix.  The aphabetic prefixes already seen include A, B, E, HI, J, JI, L, MH, MK and ML.  The logic behind this system awaits clarification.



  This close-up shows the Jensen speaker's EIA (Electronics Industry Alliance) code number - 220 045.  The EIA number assigned to Jensen was 220.  The numerals 045 denote year '0', which is 1960, with '45' denoting the 45th week of that year.

   A schematic diagram and instructions were supplied with every amp. An interesting feature of every tube amp 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.  This item is seen is seen at the top of the schematic diagram above, marked EP-9097, with ten numbered leads exiting from it.  The item itself can be seen in the lower centre of the amp chassis in the rear view of the amp above.

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

 




 
Model R15T


 
Model R25T (photo copyright The Tiny Acorn)


  Studio amp.  This item was designed as a wall-mounting version of the R5T amp, with a built-in stand for sheet music (Photo copyright Grossman Music Corp.)


This is the foot-switch as supplied with every Tube amp manufactured by DeArmond.  The metal baseplate of this switch is stamped Rowe-DeArmond.



CF Martin Tube Amps:

DeArmond also produced five tube amplifiers for C. F. Martin. These were standard DeArmond models with cosmetic differences only, including a different baffle material, black fabric covering, a chrome control panel and black knobs:

   Model 110 (as R5) (photos copyright David Boltz)

 

  Model 110T (as R5T) (photo copyright Photoshop Steve)



Model 112 (as R15) (photo copyright Bluespower)


Although it has a DeArmond logo attached and a non-standard grille cloth, this in in fact a CF Martin Model 112.  The DeArmond logo is appropriate in this case as this was Harry DeArmond's own amplifier, used regularly by him, photographed in the basement workshop of his home in Toledo, Ohio.  Its serial number is F6 2013 (Serial number information courtesy of Charley Barnhart, Harry DeArmond's grandson.




Model 112T (as R15T).


DeArmond Solid-state Amps:

In the 1970s, the company began producing a range of solid-state amplifers and speaker cabinets for guitars, basses and PA:


  Guitarist 20 Amp (photo copyright metaphoria3)



 
Guitarist 40 Amp (photo copyright B. Corbett)


Bassist 1

Bassist 20 Amp (Photo courtesy of David Byrne)


       Bassist 40 (photos copyright Eyezon Guitarz)

  
   M25 PA speaker cabinet
(photos copyright Mike petraglia)


  Stage Monitor Model M10P-40VC
(photos copyright Foxypetals)


  PA4160 Amp, and other items


  1122P PA speaker enclosure

Steve Tosh joined DeArmond in 1973, eventually becoming CEO of the music products part of the company.  During his time with the company, he was responsible for the design and introduction of a number of new products and for updating other existing products.