Amplifier schematics-

Tube:
435sn (Rhapsody)
625D
835N
B-12X
B-42X
EJ-12A
ET-1 (Echo Twin)
ET-2  (Echo Twin II)
G-12 (Gemini I)
G-20
GV-15
GV-22 (Gemini 22)
J-12D
M-12A (Mercury)
R-12A
R-12R Reverberocket
V3
V4/VT-22 (1970)
V4/VT-22 (1977 Master volume version)
V4/VT-22 (1976 Distortion version)
V4B (1971)
V7

Solid State:
A-120 Power amplifier
BT-15 / BT-18
G-18 (Rev A) G-18 (Rev B)
GT-10
ST-22 / ST-25
ST-42
SST/SBT Power amplifier

Service memos-
Troubleshooting musical instrument amplifiers This document appeared in the 1969 Policy manual for Ampeg authorized service centers.

Service tips 1976 Contains service tips for B100/G100, SR-6, V4/VT22 with distortion, and 120W solid state power modules

Stringed instrument documents-
Upright electronic bass (BB-4/BB-5)

Promotional and retail materials-
Michael-Hull Labs Model 770 brochure The first Ampeg amplifier
Late 50s Accordiamp brochure
1970 Price list
1971 Ampeg amplifier catalog
Ampeg sales catalog circa 1971
1973 Ampeg amplifier catalog
V4 (Distortion version) sales brochure

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This is just a sample of things to come.  There are many more schematics and documents being scanned and uploaded.