bc audio
9/2014
Amplifier No. 10 Owner’s Manual
IMPORTANT SAFETY INSTRUCTIONS
READ, FOLLOW, HEED, AND KEEP ALL INSTRUCTIONS AND WARNINGS.
• DO NOT REMOVE SCREWS ON BOTTOM. LETHAL VOLTAGES LURK INSIDE.
BOO! CONTACT THE MANUFACTURER FOR SERVICE INFORMATION. SERVICE
MUST BE PERFORMED BY QUALIFIED PERSONNEL.
• THIS AMPLIFIER IS CAPABLE OF PRODUCING HIGH SOUND PRESSURE
LEVELS. CONTINUED EXPOSURE TO HIGH SOUND PRESSURE LEVELS CAN
CAUSE PERMANENT HEARING IMPAIRMENT OR LOSS. WHAT? SPEAK UP!
USER CAUTION IS ADVISED AND EAR PROTECTION IS RECOMMENDED IF
UNIT IS OPERATED AT HIGH VOLUME. WHICH OF COURSE IT SHOULD BE.
• WHEN POWERED ON, THE TUBES MAY BECOME VERY HOT, HOT ENOUGH
TO BURN SKIN ON CONTACT. SO DON’T TOUCH ‘EM. AND KEEP OUT OF
REACH OF CHILDREN AND PETS.
• DO NOT OPERATE WITHOUT SPEAKER OR OTHER SUITABLE LOAD
CONNECTED TO THE SPEAKER JACK, AS DAMAGE MAY RESULT.
• DO NOT OPERATE NEAR ANY HEAT SOURCE.
• DO NOT OPERATE WITH VENTILATION OPENING(S) COVERED, AS THIS MAY
OVERHEAT THE AMP. DUH.
• DO NOT USE NEAR SPLASHING, FALLING, SPRAYING, OR STANDING
LIQUIDS. AND DON’T EVER LET SOME FOOL SET HIS DRINK ON YOUR RIG.
• CLEAN ONLY WITH A LINT-FREE DRY CLOTH. DO NOT USE CLEANING
AGENTS.
• CONNECT POWER CORD ONLY TO A POLARIZED, SAFETY GROUNDED
OUTLET WIRED TO CURRENT ELECTRICAL CODES AND COMPATIBLE WITH
VOLTAGE, POWER, AND FREQUENCY REQUIREMENTS STATED ON THE
APPLIANCE.
• PROTECT THE POWER CORD FROM DAMAGE DUE TO BEING WALKED ON,
PINCHED OR STRAINED.
• UNPLUG THE APPARATUS DURING LIGHTNING STORMS OR WHEN NOT IS
USE.
• REPLACE FUSE WITH CORRECT TYPE AND RATING AS INDICATED IN THIS
MANUAL AND ON THE APPLIANCE.
• ONLY USE ATTACHMENTS, ACCESSORIES, STANDS, OR BRACKETS
SPECIFIED BY THE MANUFACTURER FOR SAFE OPERATION AND TO AVOID
INJURY.
2
OVERVIEW
MAJOR FEATURES
•
Built by Bruce Clement in the USA
•
100% All-Tube Signal Path
•
True Point-to-Point Wiring
•
American-made Paper Bobbin/Paper
Layer Wound Transformers
•
Custom Heavy 16ga Zinc-coated
Steel Chassis w/ Welded Corners
•
Stainless Steel Hardware
•
EL34 Output Section
•
Octal Preamp
•
Bass/Mid/Treble EQ Controls
•
Master Volume Control
•
Independent Gain Boost and Volume
Boost, w/ Front Panel Gain Boost
and Volume Boost Controls, Dual
Foot Switch Included
•
Depth and Presence Controls
•
Fully Tube-buffered Effects Loop w/
True Bypass Switch
•
Individual Output Tube Bias
•
Impedance Selector for 4, 8 or 16
Ohms
•
120/240VAC Line Voltage Switch
TUBE COMPLEMENT
(2) EL34 Power Tubes
(4) 6SL7 Octal Preamp Tubes
SETTING BIAS
When replacing power tubes, always
replace with a matched pair and check
and adjust the bias. Amplifier No. 10 is
equipped with individual bias
adjustments for each output tube.
For detailed information on setting the
bias, have your amp technician contact
BC Audio.
ESSENTIAL INFORMATION
Tube placement, left to right (facing the rear):
V1 V2 V3 V4 V5 V6
6SL7 6SL7 6SL7 6SL7 EL34 EL34
Power (at 120VAC Input): 120VAC, 60Hz, 2A
Power (at 240VAC Input): 240VAC, 50-60Hz, 1A
Mains Fuse (at 120VAC Input): 3A Slow Blow, Type 3AG, 1/4” x 1-1/4”
Mains Fuse (at 240VAC Input): 1.5A Slow Blow, Type 3AG, 1/4” x 1-1/4”
H.T. Fuse: 500mA, Type 3AG, 1/4” x 1-1/4”
3
CONNECTIONS AND CONTROLS
