CRYSTAL CALIBRATOR No 10 FOR WS62 ZA32171
On offer today we have a Calibrator, Crystal No 10 which is the accesory calibrator to the WS62. This example is in smashing cosmetic condition with all it's components as original with no signs of bodging. The device has not been powered but the tuning and controls have been verified as operational.
The Calibrator, Crystal No10 was primarily designed for the purpose of setting up Wireless set No 62 accurately on the required spot frequency. The calibrator functions as a CW wavemeter with continuous coverage of a nominal frequency band of 1.5 - 10.0 Mc/s. The calibrator power supplies are obtained from the socket engraved XTAL CAL on the Wireless Set 62. Below, we have a few technical details on thios device: -
The following facilities are available:
1. Selector switch to 500kc/s position.
A crystal controlled oscillator provides fixed frequency signals of 500kc/s to well beyond 10mc/s.
2. Selector switch in DIAL position.
In addition to the 500kc oscillator, a second and variable oscillator (250-500kc) is brought into circuit. This enables all frequencies between 500kc and 10mc to be produced - these frequencies are indicated on the dial on the front panel.
For identification purposes, the calibrator signal is modulated at about 1 cycle per second by means of a neon tube.
The output from the calibrator is taken from the terminal engraved AERIAL on the front panel.
Power Supply (ex WS62)
LT 12v dc at 300ma - series heaters - 1.4v valve heaters.
HT 300v dc at 15ma
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