[R-390] AGC Problems

[Perry Sandeen]

List,
 
David Wise is being far too modest. Dave
contributed a tutorial named AGC – Ending The Moment Of Silence where he re-engineered
the AGC circuit to eliminate this problem. It’s found in Chapter 11 of the Y2KR3
manual.
 
If one hasn't done so already, it is to one’s
great advantage to D/L at least Chapters 9 and up.
 
There is a wealth of information, much of which is
the from the kindness of Roger Ruszkowski, that will greatly aid in both
trouble shooting and alignment.
 
Another resource that is available is the
schematics I've made entitled “The Almost Ultimate R390A Upgrade Schematic”.  Besides upgrades, the schematics have listed
a number of known re-occurring problem areas and parts.
 
The schematic is in two parts.  Since I did them as an 8 bit TIFF image, one
can take them to a Kinko’s or similar place with a large format printer and get
them enlarged to whatever size is useful too you as they won’t smear when
enlarged.  My 18 inch by 3 foot wide schematics
cost me about $7 each.
 
The Y2KR3 manual can be found at:  WWW.r-390a.net.
 
I’ll be glad to email my schematics to
anyone.  Please contact off-line.
 
Regards,
 
Perrier heretic-in-chief