Check it out at
http://photos.groups.yahoo.com/group/amateur-repairs/lst
Click on Heathstuff.
layout is
Tektronix
2215
Signal/One Tektronix
CX7A TDS-210
Tektronix Heath
2215 SB-303
Heath Heath Heath
SB-102 SB-303 SB-303
de ah6gi/4