1968-1980

Configuration: Piggyback
Power: 40 Watts
Effects: Reverb, Tremolo

SCHEMATICS

• Bandmaster Reverb AA768
• Bandmaster Reverb AA568
• Bandmaster Reverb AA1069
• Bandmaster Reverb AA270

LAYOUT

• Front Panel: "Normal" In, In, Bright Switch, Volume, Treble, Bass - "Vibrato" In, In, Bright Switch, Volume, Treble, Middle, Bass, Speed, Intensity, Reverb - Master Volume (76-80) - Pilot Light
• Back Panel: AC Outlet, Ground Switch, Fuse, Power Switch, Standby Switch, Speaker Jack, External Speaker Jack, Vibrato Jack, Reverb Jack, Reverb Out, Reverb In

CABINET

• Dimensions:
  • Head: 13 x 25 x 9-1/2
  • Cabinet: 39-1/4" x 29" x 11-1/2" (68-75)
  • Cabinet: 30" x 28" x 12" (76-80) 
• Tolex: Black
• Grill Cloth: Blue / White / Silver w/ Aluminum Frame (68-69) w/o Aluminum Frame (70-80)
• Logo:  Grill Mounted, Raised, Chrome & Black Script w/ Tail (68-75) w/o Tail (76-80)
• Handle: Black Strap
• Feet: Chrome Glides
• Corners: Chrome Corners w/ Lip
• Knobs: Black Skirted w/ Chrome Center, Numbered 1-10
• Hardware: Large Chassis Straps 5 5/8", Side Bar Clips

SPEAKERS

• Size: 2 x 12
• Impedance: 4 ohms (8 ohms each in parallel)
• Speaker Model: Oxford 12T6, Utah 12" (ceramic) and JBL D-120 (For more info, check out the Mojotone Replacement Speaker Guide)

TUBES

• Pre amp:
  • Normal: 7025
  • Tremolo: 7025 and 1/2 7025
  • Phase Inverter: 12AT7 (Long Tailed)
  • Tremolo: 12AX7 (photoresistor)
  • Reverb Driver: 12AT7
  • Reverb Recovery: 1/2 7025
• Power: 2 x 6L6GC
• Bias: Fixed with Bias Adjustment Pot
• Rectifier: 5U4

Comments: AA568 included a major change to the bias section of the power amp which was poorly received so Fender changed the model design to the AA1069 but kept much of the disliked circuitry. The aluminum trim was deleted from cabinets when the AA1069 model appeared in 1970. In 1970 a grounded AC plug and three-position ground switch were added to the rear panel.