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Digital Frequency Meter, Counter & Timer 3001A

Digital Frequency Meter, Counter & Timer 3001A; Dawe Instruments Ltd (ID = 944351) Equipment Digital Frequency Meter, Counter & Timer 3001A; Dawe Instruments Ltd (ID = 944352) Equipment
Digital Frequency Meter, Counter & Timer 3001A; Dawe Instruments Ltd (ID = 944353) Equipment  
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Digital Frequency Meter, Counter & Timer 3001A; Dawe Instruments Ltd (ID = 944351) Equipment
Dawe Instruments Ltd: Digital Frequency Meter, Counter & Timer 3001A [Equipment] ID = 944351 640x480
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For model Digital Frequency Meter, Counter & Timer 3001A, Dawe Instruments Ltd.; London
 
Country:  Great Britain (UK)
Manufacturer / Brand:  Dawe Instruments Ltd.; London
Year: 1970 ?? Category: Service- or Lab Equipment
Valves / Tubes 6: GN4
Semiconductors (the count is only for transistors) Semiconductors present.
schematic requested
Wave bands - without
Details
Power type and voltage Alternating Current supply (AC) / 110/220 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Radiomuseum.org Model: Digital Frequency Meter, Counter & Timer 3001A - Dawe Instruments Ltd.; London
Material Metal case, TUBES VISIBLE
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


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.
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

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



All listed radios etc. from Dawe Instruments Ltd.; London
Here you find 3 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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