1972-1981 Vibrosonic Reverb

Year:

 72-81

Model:

 Vibrosonic Reverb

Circuit:

 ?

Config:

 Combo

Control Panel:

 Silver, forward facing w/ blue labels

Front Conrol Layout:

 Normal: In, In, Bright Sw, Vol, Treb, Mid, Bass - Vibrato: In, In, Bright Sw, Vol, Treb, 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 3/4" x 10 5/8" (50.8 x 67.9 x 27 cm)

Cab Covering:

 Black Tolex

Cab Hardware:

 Black strap handle, 5½" Chassis straps, 16" tilt-back legs, corner protectors, casters

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(68-76) or "Fender®" w/o tail (77-82)

Weight:

 85 lbs (38.6 Kg)

Speakers/Load:

 1 x 15"/4 ohms

Speaker Model:

 Fender PS-15 (72-74), JBL D-130F (74-79), Electro Voice (79-81) or Gauss 15"

Effects:

 Reverb, Tremolo

Output:

 100 or 135 (77-82) Watts

Preamp:

 Normal: 7025
Vibrato: 7025, ½ 7025

Power:

 4 x 6L6GC

Bias:

 Fixed w/ Bias Pot.

Rectifier:

 Solid State

Phase Inverter:

 12AT7 (long tailed)

Other:

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

Comments:
  • Fender switched back to the blackface era cosmetics some time in 1980. Vibrosonic Reverbs produced between late 1980 and 1981 have a black control panel and silver sparkle grille cloth.
  • A Line Out jack, hum balance pot, and a pull boost sw. were added near the end of the models run.