Modifications for the Kenwood QR-666

QR-666 VFO stability

Author: Trio-Kenwood Communication, inc.


Service bulletin no. 3 (10-01-1975)

Trio-Kenwood is extremely proud af the reliability of our communications gear. Quality control is performed at our Toykyo factoyr as well as Gardena, California facility.

We have found that a small percentage of the QR-666 SWL receivers may have a slight case of instability if carelessly handled in shipping.

Here is a simplecure we've found to eliminate the symptons:

Check all screws which hold the RF circuit board (the one with band switch attached). Check top and bottom screws (holding spacers to shassis).

You'll probably never have this problem, but.......




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