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.
