[R-390] R-390A Zero adjust

[k2cby]

The disc attached to the zero adjust shaft on my R-390A (a 1954 Motorola)
has always been loose and rotates freely, but it works fine.

 

As the zero adjust knob is rotated clockwise, the disc at the end of the
shaft bears on three pins projecting from the clutch. The disc doesn't turn
anything; it imparts pressure, not rotary motion. So long as the pins are
depressed the clutch will disengage.

 

Miles B. Anderson, K2CBY
16 Round Pond Lane
Sag Harbor, NY 11963
Tel.: (631) 725-4400

Fax.: (631) 725-2223
e-mail: k2cby at optonline.net