Fender Twin Amplifier owner manual Fig. Fig

Fig. 1

Fig. 2

If a fuse blows, it should be replaced only with a fuse in accordance with the listing at the fuse holder. If the amplifier repeatedly blows fuses, it should be checked out by a qualified technician. UNDER NO CIRCUMSTANCES should a fuse of a different type or higher rating, or a fuse bypass be used, as this could damage the equip- ment and present a serious safety hazard.

B. POWER SWITCH — This switch turns the AC power on and off. When the switch is off (down), the amplifier is completely shut down.

C. STANDBY SWITCH — When in the STANDBY position, the ampli- fier is off; however, the tube filaments are left on as to eliminate warm-up time, provided that the POWER SWITCH (item B) is ON. Use of this feature during short breaks versus using the POWER SWITCH will increase tube life.

D. OUTPUT SWITCH — When in the OUTPUT HIGH position, the maximum output power of the Twin is set to 100 watts RMS, when in the OUTPUT LOW position, 25 watts RMS. The OUTPUT HIGH posi- tion is normally used in most applications, and the OUTPUT LOW position is useful for simulating a smaller amplifier, especially when the power amp is overdriven.

E. EFFECTS LEVEL — This switch directly affects the signal level appearing at the EFFECTS SEND JACK (item F) by boosting or atten- uating the signal being sent to the effects. External rack effects usual- ly require a setting of 3dBV. Use the highest setting possible that does not produce distortion for the best low noise performance.

F. EFFECTS SEND JACK — Provides an unbalanced output signal from the preamp, pre-reverb. It is used to patch into effects.

G. EFFECTS RETURN JACK — This jack provides a pre-reverb return from effects gear. Plugging into this jack makes the MIX control on the front panel active.

H. PRE-AMP OUT JACK — The PRE-AMP OUT JACK, in conjunction with the POWER AMP IN JACK (item I), provides a post-reverb patch point at the power amplifier input. This jack can be used to provide an unbalanced, line-level signal (1.3dBV) for recording and sound reinforcement consoles, and for driving external power amplifiers, or another TWIN used as a slave amp. To use another TWIN as a slave amp, simply run a guiter cord from the master TWIN’S PRE- AMP OUT JACK to the slave TWIN’S POWER AMP IN JACK . (Note: this output is best for driving tube type slave amps. See item P, BALANCED LINE OUT, for driving solid-state slave amps.)

I. POWER AMP IN JACK — This jack connects directly to the input of the power amplifier. It automatically disconnects the preamp signal when used. This is useful for using the Twin as a slave amp.

J. OUTPUT BIAS ADJUST — This trim adjustment is used in conjunc- tion with the OUTPUT BALANCE ADJUST (item L) and the BIAS TEST POINTS (item K) to set the output tube bias. See Output Tube Bias Adjustment Instructions below.

K.BIAS TEST POINTS — Used to measure output tube bias and balance with a digital voltmeter. See Output Tube Bias Adjustment Instructions below.