1968-1982 Twin Reverb

(Silver Face Twin Reverb)

1968 Twin Reverb w/ original cover

Year:

1968-1982

Model:

Twin Reverb

Circuit:

AC568, AA769, AA270

Config:

Combo

Control Panel:

Silver, forward facing w/ blue labels

Front Conrol Layout:

68-71: Normal: In, In, Bright Sw, Vol, Treb, Mid, Bass - Vibrato: In, In, Bright Sw, Vol, Treb, Mid, Bass, Rev, Speed, Intensity - Pilot Lamp
72-83: Normal: In, In, Bright Sw, Vol, Treb, Mid, Bass - Vibrato: In, In, Bright Sw, Vol, Treb, Mid, Bass, Rev, Speed, Intensity - Master Vol - Pilot Lamp

Rear Conrol Layout:

AC Outlet, Ground Sw, Fuse (2½A), Power Sw, Standby Sw, Speaker Jack, Ex. Speaker Jack, Vibrato Jack, Reverb Jack, Reverb Out, Reverb In

Knobs:

Black skirted w/ chrome center, numbered 1 - 10

Cabinet:

20" x 26" x 10½" (50.8 x 67.3 x 26.7 cm)

Cab Covering:

Black Tolex

Cab Hardware:

Black strap handle, 5½" Chassis straps, 16" tilt-back legs, corner protectors, glides (68-71) or casters (72-82)

Grille:

Blue sparkle grille cloth w/ aluminum frame (68-69), w/o aluminum frame (70-81)

Logo:

Grille mounted, raised, chrome & black script "Fender" w/ tail (68-74) or "Fender®" w/o tail (74-82)

Weight:

69 lbs. (31.3 Kg)

Speakers/Load:

2 x 12"/4 ohms (8 ohms each in parallel)

Speaker Model:

Oxford 12T6, Utah 12", Rolad 12" or Gauss 12"

Effects:

Reverb, Tremolo

Output:

68-76: 100 Watts
77-82: 135 Watts

Preamp:

Normal: 7025
Vibrato: 7025, ½ 7025

Power:

4 x 6L6GC

Bias:

Fixed, adjustment pot or balance pot (AA769, AA270)

Rectifier:

Solid State

Phase Inverter:

12AT7 (long tailed)

Other:

Reverb Driver: 12AT7
Reverb Recovery: ½ 7025
Tremolo: 12AX7(photoresistor)

Comments:

  • A master volume was added in 1972.
  • Other late seventies circuit changes included a Line Out jack, hum balance pot, and a pull boost sw.
  • Fender switched back to the blackface era cosmetics some time in 1980. Twin Reverbs produced between late 1980 and 1982 have a black control panel and silver sparkle grille cloth.


AA769 Twin Reverb Schematic
AA769 Twin Reverb Chassis Layout
AA270 Twin Reverb Schematic
AA270 Twin Reverb Chassis Layout 100W Twin Reverb Schematic 135W Twin Reverb Schematic
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