1959-1963 Vibrasonic
(Brown Vibrasonic)

Year:

 1959-1963

Model:

 Vibrasonic

Model No:

 5G13, 5G13, 6G13-A

Config:

 Combo

Control Panel:

 Brown forward facing w/ white screened labels, controls numbered 1-10

Front Conrol Layout:

 5G13: Normal: In, In, Bass, Treb, Vol - Vibrato: In, In, Bass, Treb, Vol, Speed, Intensity - Presense - Pilot Lamp
6G13-A: Normal: In, In, Vol, Treb, Bass - Vibrato: In, In, Vol, Treb, Bass, Speed, Intensity - Presense - Pilot Lamp

Rear Conrol Layout:

 5G13: Ground Sw, Fuse (3A), Power Sw, Standby Sw, Speaker Jack, Vibrato Jack 6G13-A: Ground Sw, Fuse (3A), Power Sw, Standby Sw, Speaker Jack, Ex. Speaker Jack, Vibrato Jack

Knobs:

 Brown round

Cabinet:

 20" x 25" x 10¼" (50.8 x 63.5 x 26 cm)

Cab Covering:

 Pinkish brown (59-61) or brown Tolex (61-63)

Cab Hardware:

 Brown plastic "Fender" handle, 5½" chassis straps, glides

Grille:

 Brown (59-61), Maroon (61-62) or Wheat (62-63) grille cloth

Logo:

 Grille mounted, flat, chrome & black script "Fender" w/ tail

Weight:

 ?

Speakers/Load:

 1 x 15"/8 ohms

Speaker Model:

 JBL D-130F

Effects:

 Tremolo

Output:

 ?

Preamp:

 Normal: 7025
Bright: 7025

Power:

 5G13: 2 x 6L6GC
6G13-A: 2 x 5881

Bias:

 Fixed Bias, nonadjustable

Rectifier:

 Solid State

Phase Inverter:

 7025 (long tailed)

Other:

 Tremolo:
5G13: 2 x 7025 (harmonic vibrato)
6G13-A: 12AX7, ½ 12AX7 and 7025 (harmonic vibrato)

Comments:
  • Mode 6G13-A's tremolo circuit left ½ 12AX7 unused.
  • Some early Vibrasonics have a plugged hole in the rear panel labeled "pulse adj." located about 1½" to the right of speaker jack. As the label implies this may have been a control to adjust the waveform of the tremelo.