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

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. 

 

Standby/Play switch: 

Up is play mode. When amp is not being used, but being warmed up, place amp into 

standby mode.  

 

Effects Loop Patch jack: 

This is a stereo ¼”. The tip is the return to the power amp. The ring is the send from the 

preamp. This may be used with an outboard effect loop like the Plush Tube FX loop, or 

various other aftermarket devices for this purpose. Depending on the outboard unit you 

Summary of Contents for Blackjack-21-II

Page 1: ...II Lucky 7 II Four Aces heads combo Fuchs Audio Technology 407 Getty Ave Clifton NJ 07015 973 772 4420 fax 973 772 4460 Website www fuchsaudiotechnology com Email info fuchsaudiotechnology com 2000 2...

Page 2: ...tremendous 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 glory by your full understan...

Page 3: ...fore powering up your amp 3 Diagrams FRONT REAR panels Tube bias diagram 4 Front panel Controls inputs their functions 5 Rear Panel controls inputs outputs 6 Biasing power tubes other technical info 7...

Page 4: ...itry are on the circuit card while the power tubes and transformers are mounted on the chassis A detachable power cord is standard By using single point grounding the amp is quiet and free of hum at a...

Page 5: ...tall 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...

Page 6: ...3 Diagrams of FRONT REAR Panels Tube Bias Diagram Front Panel Rear Panel Tube Bias diagram Biasing for various models...

Page 7: ...dals effects input is also inserted to this input in series with your guitar Clean Gain Control The gain control sets the overall gain volume for the amplifier in the clean channel 1 mode Adjust to vo...

Page 8: ...sis 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 occur...

Page 9: ...questions in this regard Fuchs Audio takes no responsibility or shall be held liable for any personal harm caused or damage to this amplifier as a result of unauthorized service repair or internal ad...

Page 10: ...an to replace your obsolete outlet Do not defeat the safety purpose of this plug Protect the power supply cord from being pinched or abraded This product should only be used with a cart or stand that...

Page 11: ...This does not apply to Fuchs amplifiers that have been tampered with damaged by shipping carriers reverse engineered or modified Your warranty form information must be returned to Fuchs Audio Technol...

Page 12: ...________ Model ___________ Serial Number ___________________________________ Date of Purchase ___________________________________________________ Dealer Name __________________________________________...

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