Vintage Ampeg Amplifier Schematics
My re-drawings of original Ampeg schematics
EchoTwins & Gemini
 ET-1 Echo Twin
 ET-2 Super Echo Twin
 G-12 Gemini-I  G-15 Gemini-II
 GS-15-r Gemini-VI  GV-22 Gemini-22
Jets & Mercury
 J-12-A Jet  J-12-B Jet
 J-12-D Jet  EJ-12 EchoJet
 M-12 Mercury  M-12-A Mercury
 M-15 Big M Mercury  AC-12 Accordian Amp
Portaflex & Reverberockets
  B-15-N B-15-N (1968)
  B-15-NC B-15-NF
  B-18-N B-25-N
  SB-12 SB-12 w/7868's
  R-12-A R-12-R
  R-12-RB R-12-RT
R-15-R SuperbReverb
 GS-12-R Reverberocket 2
 GS-12-R Rocket II
SVT
 SVT Preamplifier Section  SVT Power Amp 6146B Outputs  SVT Power Amp 6550 Outputs
V-Series
 V2 Preamplifier
 V4 Preamplifier
 V9 Preamplifier
 VT40 Preamplifier
 V3 Power Amp
 V4B Power Amp
 VT-22 Power Amp
 V3 Preamplifier
 V4B Preamplifier
 VT-22 Preamplifier
 V2 Power Amp
 V4 Power Amp
 V9 Power Amp
 VT40 Power Amp

 Ampeg Schematics  Ampeg Voltage Charts  Tube Data Sheets