• Country
• Great Britain (UK)

• Manufacturer / Brand
• Dawe Instruments Ltd.; Brentford, Middlesex

• Year
• 1970 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 191986

• Number of Tubes
• 6

• Valves / Tubes
• GN4

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 110/220 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case, TUBES VISIBLE

• from Radiomuseum.org
• Model: Digital Frequency Meter, Counter & Timer 3001A - Dawe Instruments Ltd.;

• Shape
• Tablemodel with Push Buttons.

• Dimensions (WHD)
• 235 x 180 x 290 mm / 9.3 x 7.1 x 11.4 inch

• Notes
• This transistorized unit, features a frequency meter, a counter and a timer all in one.
  
  The display consists of 6 red filtered tubes type GN4. The counter & display unit (top) is detachable from the signal input & control unit (bottom).
  
  It has 4 main groups of pushbuttons:
  1- Function: Frequency, Time, Period, Count
  2- Display multiplier for Freq/Time/Period: x0.01Hz, x1Hz, x10Hz, x100Hz, x1kHz, x10kHz, x100kHz
  3- Input multiplier for Period/Count: x10, x100, x1000
  4- Events: Start, Stop, Reset
  
  It has a single group of 2 switches:
  1- Normal vs Accumulate
  2- Auto vs Hold
  
  

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  One interesting note on the display unit, is that each nixie driver also has a transistor based decade counter, which also passes the signal to the next nixie board, so effectively the display unit is a 0 to 999999 counter having an additional control line to reset the count. As the unit is detachable, this make it feasible to use the display unit for other uses.
  
  The unit also has a bias input, a test output, and inputs for remote events (start, stop and reset).
  
  Inside the unit, everything is arranged in modular boards using bus-like connectors. Boards use all germanium transistors and the time reference is a huge glass encapsulated 100kHz quartz crystal.

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• Net weight (2.2 lb = 1 kg)
• 5 kg / 11 lb 0.2 oz (11.013 lb)

• Source of data
• - - Data from my own collection

• Author
• Model page created by Javier Albinarrate. See "Data change" for further contributors.

• Other Models

• Here you find 22 models, 18 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Dawe Instruments Ltd.; Brentford, Middlesex