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Tube Works 903 User Manual

Tube preamp pedal

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WARRANTY AND OWNER REGISTRATION
Your BLUE TUBE is warranted for a period of THREE
FULL YEARS against defects to the original, registered
owner provided he/she has returned a completely filled-
out OWNER'S REGISTRATION CARD.
This warranty covers parts and labor only; shipping
charges remain the sole responsibility of the owner.
Damage due to modification or abuse is excluded from
this warranty. Before returning any unit for service, a RE-
TURNED MERCHANDISE AUTHORIZATION NUMBER
(R.M.A.#) must be obtained.
Manufacturer is not responsible for consequential or in-
consequential damages resulting from any application or
use of this product. Manufacturer and sales agents as-
sume no liability or responsibility for safety or injury relat-
ing to the use of BLUE TUBE, and user agrees to hold
manufacturer and designer harmless in this regard. This
is the full extent of the warranty; no other warranties im-
plied or intended.
For service and return authorization contact:
7811 E. Pierce Street
Scottsdale, AZ 85257
Ph: 480-941-0705 Fax: 480-946-2412
BLUE TUBE
Congratulations on your purchase of the best BLUE
TUBE tube preamp pedal. For the applications in-
tended, it will give you a quality of sound unattainable
until now.
Your BLUE TUBE is intended primarily for bass, key-
board and guitar players who desire to "warm-up" and
enhance their sound by using the classic vacuum tube
as the vehicle.
The heart of the BLUE TUBE is the classic 12AX7A
twin triode vacuum tube. It is possible to obtain many
classic "old amp" sounds with your present solid-state
and probably over-processed equipment. If you are
using tube equipment, the BLUE TUBE will add even
more to the good sound you already have!
OPERATION
BLUE TUBE is capable of a very good range of appli-
cations. While a pedal always has certain limitations
vs. rack systems, care has been taken to make your
pedal as "PRO" as possible.
GENERAL GUIDELINES
1. In order to get the cleanest possible sound, set the
"Output" control to maximum and use the "Drive"
control as you would a standard volume control.
2. To get more Tube coloration and some overdrive,
reduce the "Output" control setting and increase the
"Drive" control setting.

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Summary of Contents for Tube Works 903

  • Page 1 The heart of the BLUE TUBE is the classic 12AX7A twin triode vacuum tube. It is possible to obtain many classic “old amp” sounds with your present solid-state and probably over-processed equipment. If you are using tube equipment, the BLUE TUBE will add even...
  • Page 2: Specifications

    BLUE TUBE Concept & Design: B.K. Butler SPECIFICATIONS VOLTAGE REQUIREMENT :120 VAC, 9 WATTS TUBE TYPE :12AX7A/ECC83 - SELECTED INPUT IMPEDANCE :1 MEG. OHMS S/N RATIO :70 dB (Typical) HUM & NOISE :-85 dB (Typical) OUTPUT IMPEDANCE :10 K OHMS (Typical) OUTPUT LEVEL :0 dBV (.78 V Typical)

This manual is also suitable for:

Blue tube 903