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1970s Q Max GDO-2 Grid Dip Oscillator

1970s Q Max GDO-2 Grid Dip Oscillator

Q-Max Electronics Ltd

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1970s Q Max GDO-2 Grid Dip Oscillator

This a 1970s Q Max GDO-2 Grid Dip Oscillator, and a must-have for fans of vintage radio communications. It has not been tested.

A Grid dip meter covering 1.5 to 300 MHz (Megacycles) in eight ranges, the Q-Max, mild steel with black crackle glaze finish, is in good used condition but one of the eight plug-in inductances (H: 150.0 - 300.0 Mcs) is either missing or never bought.

It comes with an original DENCO bill from 1977 for £3.02 and the instruction leaflet for a GDO-1A/2, which is torn at one corner but is still legible.

  • Country of Origin: UK
  • Manufacturer / Brand: Q-Max, Grid Dip Oscillator, GDO-1A
  • Approximate Dimensions (WHD):  7.7 x 22.4 x 9.2 cm (including knob)
  • Coil Ranges:
    • A 1.5   -  2.9  Mcs
    • B 2.9  -  5.6  Mcs
    • C 5.6  - 10.8  Mcs
    • D 10.8 - 20.5 Mcs
    • E 20.5 - 39.0 Mcs
    • F 39.0 - 75.0 Mcs
    • G 75.0 - 150.0 Mcs

Please click on the following link for more vintage radio test equipment.

Although this device appears to be working it is sold as a collectible, UNTESTED, with no guarantee and no returns.  It will be shipped with no plug top on it and a PAT Test failed label attached to the flex - this is to comply with the regulations governing the sale of vintage electronics/ electrical equipment.  

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