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Below is a limited list of comparable tube types: 
6L6: 6L6GC, 7581, 5881   

 

 

 

 

 

 

 

 

                         

6V6:  6V6S, 6V6GT  

 

  

 

 

 

 

 

 

 

           

EL-34: 6CA7  

 

 

 

 

 

 

 

 

 

 

 

 
 
Bias Ranges: Are measured and set in Volts. But can be measured and set in milliamps. 
 

 

           Numbers given are for 2 or 4 tubes combined. 

 
6L6 and EL-34 type tubes: .060V to .070V for 35watt and 50watt       Factory Setting: .064V    
 

 

 

 

        .1200V to .1400V for 100watt 

             Factory Setting: 

.1260V    
 
6V6: Installed in the 22watt versions only:  .044V to .058V  

    Factory Setting: .050V     

   
6V6: Installed in 22watt versions with tremolo, bias must not be set higher then .044V as it 
will cause tube failure.                  
 
Do not set bias higher then recommend levels as it can lead to tube failure or failure within 
the amplifier!

 

 

amplifiers are brought to you by Premier Builders Guild.

  

We know your new

 

 

amplifier will provide many hours of enjoyment and 

inspiration in the years to come.  This manual is a resource for some of your 
questions.  Please contact us with any other questions or comments that you may 
have.  We look forward to hearing from you! 

PHONE:  

1(707)584-TONE (8663) (M-F 9am-5pm PST) 

FAX: 

 

1(707)584-8661

 

 

 
ADDRESS:  Two-Rock 
 

 

 

619 Martin Avenue, Suite 6 

 

 

 

Rohnert Park, CA 94928 

 
SERVICE:     [email protected] 
WEB:       

www.two-rock.com 

 

Summary of Contents for Two-Rock Jet 22

Page 1: ...OWNERS MANUAL...

Page 2: ...nce with the manufacturer s instructions 8 Do not install near any heat sources such as radiators heat registers plugs and the point where they exit from the apparatus 9 Protect the power cord from be...

Page 3: ...le and mid range controls is greatly reduced In the full clockwise position low frequencies are allowed to pass to the gain stage When the knob is in the out position the low and low mid frequencies a...

Page 4: ...R AMPLIFIER WITHOUT A PROPER SPEAKER LOAD CONNECTED Be sure to match the impedance of your cabinet with the impedance output of the amplifier 5 Reverb Drive The reverb drive control adjusts the signal...

Page 5: ...ses are 3AG Type 250 Volt SLO BLO Export 100 Volt Domestic Fuses Export 220 230 240 Fuses 2A 22 35 Watt 2A 22 35 Watt 1A 22 35 Watt 2 5 50 Watt 2 5 50 Watt 1 6 50 Watt 3 2 100 Watt 3 2 100 Watt 2 5 10...

Page 6: ...nd connect proper speaker load DO NOT have an instrument connected to the input during the biasing procedure Take unit off standby and allow a few seconds for the circuit to stabilize Set multi meter...

Page 7: ...o bias must not be set higher then 044V as it will cause tube failure Do not set bias higher then recommend levels as it can lead to tube failure or failure within the amplifier amplifiers are brought...

Page 8: ...ning solvents Wipe exterior with a clean dry cloth only Refer servicing to a qualified service technician This is a product of Premier Builders Guild 619 MARTIN AVENUE SUITE 6 ROHNERT PARK CA 94928 70...

Page 9: ......

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