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Fender Twin (Narrow Panel Big Box)

Schematic/Layout:

• twin_5f8.pdf
• twin_5f8a.pdf

Model/Circuit Number: 5F8, 5F8-A
Years of Production: 1958 - 1960
Era: Narrow Panel
Configuration: Combo
Controls: Chrome top facing w/ white screened labels, controls numbered 1-12
Knobs: Black Chicken Head
Faceplate

• Front: Ground Sw, Fuse (3A), Power Sw, Standby Sw, Pilot Lamp, Presence, Mid, Bass, Treb Bright Vol, Normal Vol, Bright In, Bright In, Normal In, Normal In
• Rear:

Cabinet

• Dimensions: 19'' x 26 1/2'' x 10 1/2''
• Hardware:
• Handle: Leather Handle
• Feet: Glides
• Corners:

Covering Material

• Tolex/Tweed: Diagonal tweed or brown Tolex (60)
• Grill Cloth: Brown Grill Cloth

Logo: Cabinet mounted, Script
Weight:
Speaker

• Size: 2 x 12
• Impedance: 4 ohms
• Model: Jensen P12N(For more info, check out the Jensen Replacement Speakers)

Effects:
~Watts: 80-100 watts
Tubes

• Pre amp: 12AX7
• Power: 4 x 5881

Bias: Fixed bias, nonadjustable
Rectifier: 5F8: Mercury Vapor 83 ; 5F8-A: GZ34

Comments: A selenium rectifier was used in the bias circuit. Two speaker jacks were wired in parallel were located under the chassis.