Versatile AM/FM Superhet type. Built-in Gear Drive Vernier. This Cap has five sections: one 19 plate for 13 to 260pf, one 13 plate for 115pf, and three separate 5 plate sections, each providing 3-20pf. The shaft is ball bearing mounted, made of brass and attached to a gear driven vernier drive that may be used or removed. Four trimmers on the side. Dimensions: 1-5/16” high by 1½” wide by 2-3/8” long. 1-3/16” long tuning shaft. The gangs may be connected for a wide capacitance range. Suitable for a variety of radio and crystal set projects. Very well made. Three untapped mounting holes on the front, two which may be used with the gear drive vernier installed using two #6 standoff spacers 5/8” long. Seven untapped mounting holes on the bottom.
This capacitor will cover the full broadcast band range by removing the four trimmers and connecting all of the separate gangs in parallel. The capacitor range will then be 22pf to 430pf. Accounting for distributed capacitance of the coil and limiting stray capacitance, a 210.2 uH coil with the 22 to 430pf will cover the full broadcast band of 530 to 1700 kilocycles.