Mr. L, despite the seemingly great age of that unit, if it's really late 60s it is not a tube unit and would be considered "vintage solid state". You might get more discussion in that forum. But to answer your deoxit question, see the "Idiot's Guide to Deoxit" thread, link below. It will have a lot of good info.
http://audiokarma.org/forums/showthread.php?t=207005
And welcome to AK!