[Premium-Rx] W-J 8888

[Terry O']

 >>>The faults I have had
 >>>Encoder tuning - dirt in the encoder mechanism


The encoder in the Quad-8 was designed and constructed in house by WJ.  
There were no rotary encoders suitable for electronic equipment when WJ 
developed the radio.  The engineer adapted the concept from position 
sensors on CNC machines.  They never patented the idea, which can now be 
found in millions of radios and electronic equipment.

Moral of the story:  If you need to clean one, be careful.  There are no 
commercial replacements available.

Closely related - I'd like to thank Steve Pappin and Spencer Bahner for 
finding and sending me copies of the rotary encoder spec sheets for the 
WJ-861x and WJ-871x receivers.  I'll be posting it on my website shortly.

Best,
Terry O'
http://watkins-johnson.terryo.org