Fuchs Audio Technology Blackjack 21-II Operation Manual Download Page 8

OD-Gain: 

The OD-gain control sets the amount of drive in the gain channel. This channel is 

accessed by the left footswitch button, or by pulling the Overdrive Master control knob 

out. This control will adjust how much gain and distortion you will have in channel-2. 

 

OD-Master: 

The OD-Master controls the volume of the amp in channel-2 (overdrive) mode. The 

Overdrive gain (above) sets the amount of distortion, and the Overdrive master sets the 

volume at which the drive channel operates. 

OD-tone: 

The OD tone control is a simple high cut control which allows you to go from “woman 

tone” (full counter clockwise), to D-style (center 30% range), to rock/English tones (full 

clockwise). 

 

Reverb Level: 

The Reverb level control adjusts the amount of reverb return to the amp. 

 

Reverb Decay: 

The Reverb decay adjusts the time it takes for the reverb signal to decay. 

Counterclockwise is the shortest decay, and turning all the way clockwise increases the 

decay time. 

 

5.

 

REAR PANEL CONTROLS, INPUTS/OUTPUTS 

 

 

 

 

 

 

AC power cord input: 

Using a standard IEC power cord. Connect to AC POWER IN on the amplifier and to AC 

power source. Please note the voltage on the chassis, and make sure you are supplying 

the correct AC voltage to the unit. Damage from incorrect voltages is not covered by 

warranty. 

 

AC power Fuse: 

This fuse protects the amplifier if any malfunction occurs. Use ONLY the stock fuse 

rating as supplied by factory and shown on the rear panel for the voltage and current in 

your location. 

 

Speaker outputs: 

4, 8, 16-ohm outputs. Use the same impedance as the speaker you are using for 

maximum power and performance and use 

only one speaker output at a time

 

 

Summary of Contents for Blackjack 21-II

Page 1: ...se 50 and Wild Card 100 head combo Fuchs Audio Technology 407 Getty Ave Clifton NJ 07011 USA 973 772 4420 fax 973 772 4460 Website www fuchsaudiotechnology com Email info fuchsaudiotechnology com 2000...

Page 2: ...dous musicality of this new series Please read this manual carefully Although these amps were created to be simple amplifiers to operate they will perform to fullest by your full understanding of thec...

Page 3: ...powering up your amp 3 Diagrams FRONT REAR panels Tube bias diagram 4 Front Panel Controls Inputs Functions 5 Rear Panel Controls Inputs Outputs 6 Technical Information Service Information Tube Biasi...

Page 4: ...cord is standard And through Fuchs single point grounding the amp is quiet and free of hum at all operating levels A single instrument input and 3 speaker outputs for 4 8 16 ohms are provided An effec...

Page 5: ...l instrument cable from guitar into front panel INPUT 5 Be sure both POWER switch front panel is in DOWN 0ff position and standby is in off down position 6 Install power cord to amplifier AC POWER IN...

Page 6: ...3 DIAGRAMS OF FRONT REAR PANELS TUBE BIAS DIAGRAM Front Panel Rear Panel Tube Bias Diagram...

Page 7: ...AT7 Phase inverter driver tube 4 FRONT PANEL CONTROLS INPUTS THEIR FUNCTIONS Input Jack Input jack is a 1 4 phone plug designed for 1 Meg impedance guitar level signal This input will readily accept p...

Page 8: ...the amount of reverb return to the amp Reverb Decay The Reverb decay adjusts the time it takes for the reverb signal to decay Counterclockwise is the shortest decay and turning all the way clockwise...

Page 9: ...being used but being warmed up place amp into standby mode Effects Loop Patch jack This is a stereo The tip is the return to the power amp The ring is the send from the preamp This may be used with an...

Page 10: ...ponsibility for nor shall they be held liable for any harm of any kind to any person s or property including damage to this amplifier as a result of improper and or unauthorized service repair or inte...

Page 11: ...h a polarized plug one blade wider than the other This is a safety feature If you are unable to insert the plug into the outlet contact an electrician to replace your obsolete outlet Do not defeat the...

Page 12: ...ervicing to qualified personnel only Fuchs amplifiers and loudspeaker systems are capable of producing very high sound pressure levels which may cause temporary or permanent hearing damage Use care wh...

Page 13: ...the original purchaser This excludes tubes which are covered for 90 days by Fuchs and whatever period the manufacturer of the tube provides This does not apply to Fuchs amplifiers that have been tampe...

Page 14: ...his form so we may register you for future warranty repairs or future upgrades should they become available Purchasers Name Address City State Zip Country Phone Number E Mail address Model Serial Numb...

Page 15: ...72 4420 fax 973 772 4460 Website www fuchsaudiotechnology comEmail info fuchsaudiotechnology com All Fuchs Products are Distributed in the EU through Audiowerk Distribution andLogistics AUDIOWERK e Kf...

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