1958-1960 Twin

(Narrow Panel "Big Box" Twin)

Year:

1958-1960

Model:

Twin

Model No:

5F8, 5F8-A

Config:

Combo

Control Panel:

Chrome top facing w/ white screened labels, controls numbered 1-12

Conrol Layout:

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

Knobs:

Black pointer

Cabinet:

Narrow panel, 20½" x 24" x 10½" (52.1 x 61 x 26.7 cm)

Cab Covering:

Diagonal tweed or brown Tolex (60)

Cab Hardware:

Leather Handle, glides

Grille:

brown grille cloth

Logo:

Cabinet mounted, Script "Fender Twin Amp" on rectangular tag

Weight:

?

Speakers/Load:

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

Speaker Model:

Jensen P12N

Effects:

None

Output:

80-100 Watts

Preamp:

Bright ½ 12AY7
Normal: ½ 12AY7
12AX7 shared by both channels

Power:

4 x 5881

Bias:

Fixed bias, nonadjustable

Rectifier:

5F8: Mercury Vapor 83
5F8-A: GZ34

Phase Inverter:

12AX7 (long tailed)

Comments:

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


5F8 Schematic
5F8 Chassis Layout
5F8-A Schematic
5F8-A Chassis Layout
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Field Guide - Corrections/Comments

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