ID: 
2540
Maker's Name: 
General Radio Co., Cambridge, Mass.
Where made: 
USA
Dimensions: 
10 × 18.5 × 11.5 cm

A variable butterfly capacitor with an included loop in its construction forms a tuned circuit of good Q factor.

Measures frequency in the range 250-1200 MHz.

This unit was used at RMIT, Melbourne.