Re: 3T77A manual and mildew issue
I own both 3t77 and 3t77a, in perfectly working state.
I have the original 3t77 manual but never I found the 3t77a manual.
However there is a copy of the 3t77 manual with added 12 pages of manual change information regarding the 3T77A version that explain very well the differences and the adjustment procedures. There are the schematic changes also.
You can find it here: http://bama.edebris.com/download/tek/3t77/3t77.djvu
It is in djvu format, not as usual as pdf, but easily readable for example, with IrfanView