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.

Effects Units

In about 1948, DeArmond produced the world's first musical instrument electrical effect unit, the Model 60 tremolo pedal.  Over the next 30 years, a wide range of effects units was designed and manufactured, as shown below.

The housings that DeArmond designed and produced for their own products were also used by other manufacturers of effects units, such as the Maestro range of pedals by Gibson, and other pedals products by PAIA, Moog, Oberheim and others.  Examples of some of these pedals are shown in the section entitled 'Non-deArmond products' on this site.

The range of tremolo pedals below, including the Model 60, Model 60A, Model 60B, Model 800 and Model 800-A all operate on the same basis - a mains voltage motor rocks a small sealed bottle fitted with two electrical contacts and containing  electrically conductive fluid.  The variable frequency of the 'make and break' action of the mechanism creates a type of tremolo effect.


Models 600, 602, 1600, 1602, 1620 and 1622 are all single-channel basic passive volume controls

Models 60, 60A, 60B, 800 TremTrol and 1630 each require a mains voltage 110 Volts 60 Hz electrical supply

Models 1604, 1700, 1800, 1802 Weeper, 1802 Weeper Wah Wah, 1850, 1900, 1920 and 1930 each require a 9 Volt PP3 battery.

Details:

These DeArmond effects items are listed below in numerical order:

Model 60 Tremolo pedal, no serial number, requires 110V 60Hz electrical supply


Model 60A Tremolo pedal, with serial number, requires 110V 60Hz electrical supply (Photo copyright Michael P Tachenko)


  Model 60B Tremolo pedal, requires 110V 60Hz electrical supply


Model 600 Volume control pedal


Model 602 Volume control pedal


Model 610 Combination volume & tone control pedal

Model 800 TremTrol tremolo pedal, requires 110V 60Hz electrical supply

 

Model 800-A TremTrol tremolo pedal,updated version, requires 110V 60Hz electrical supply


Model 1600 Volume pedal


Model 1602 Volume pedal


Model 1604 Pre-amp volume pedal, requires integral 9V battery driving a printed circuit-board

  Model 1620 Dual volume pedal

Model 1622 Stereo volume pedal


Model 1630 Opto-volume pedal, requires 110V 60Hz electrical supply.

  Model 1650 Pan volume stereo pedal


Model 1700 Square Wave distortion pedal, requires integral 9V battery driving a printed circuit-board

Model 1800 Wa-Wa pedal combination volume, requires integral 9V battery driving a printed circuit-board

Model 1802 Weeper pedal, requires integral 9V battery driving a printed circuit-board


Model 1802 Weeper Wah-Wah  pedal, requires integral 9V battery driving a printed circuit-board


Model 1850, Thunderbolt pedal, requires integral 9V battery driving a printed circuit-board


  Model 1900 Phaser pedal, requires integral 9V battery driving a printed circuit-board


Model 1920 Tornado phase shifter pedal, requires integral 9V battery driving a printed circuit-board


  Model 1930 Twister phase shifter pedal, requires integral 9V battery driving a printed circuit-board


Model TFS-100 Footswitch, supplied as Tremolo ON/Off switch with all appropriate DeArmond and CF Martin tube amps.