TABLE OF CONTENTS Introduction ................3 BH5H Special Features ...........4 The Front Panel ..............5 The Rear Panel ..............6 Important Information About Tubes and Tube Products ....7 A Brief History of Tubes ..........7 Tube Types and Usage ............7 The Nature of Tubes: Why (and When) to Replace Them ..8 The Importance of Proper Biasing ........9 Survival Tips for Tube Amplifiers ........10 System Block Diagram ............11...
If that’s not enough, you’ve gone and gotten yourself a Blackheart Engineering tube amp. So let’s take a big picture view of this for a second: You’re a guitar player that could have bought anything to bring your mind-bending chops to life, to unleash upon the masses the wrath of your otherworldly, mad riffin’...
BH5H Special Features: • Single-ended Class A circuit • All tube signal path • One 12AX7/ECC83 dual-triode preamp tube and one EL84/6BQ5 pentode output tube • Pentode (5W rms) Triode (3W rms) switch • DC filament power supply for all tubes •...
The Front Panel BASS MIDDLE TREBLE VOLUME INPUT 5 WATTS 3 WATTS BASS: Use this to adjust the output ON/OFF SWITCH: Use this switch to level of the low frequencies. The adjust- turn the amplifier on and off. ment range is 11 dB at 100 Hz. 5 WATTS/3 WATTS: This is the MIDDLE: Use this to adjust the output Pentode/Triode switch.
Important Information about Tubes and Tube Products: A Brief History Of The Tube: In 1883, Edison discovered that electrons would flow from a suspended filament when enclosed in an evacuated lamp. Years later, in 1905, Fleming expanded on Edison’s discovery and created the “Fleming Valve.”...
Important Information About Tubes and Tube Products (continued): The power tubes are the largest tubes used in an amplifier. These tubes convert the low-level, conditioned signal from the preamplifier into a level that is sufficient to drive the speakers. There are several types of power tubes available, each of which offers a different perfor- mance/sound characteristic.
Important Information About Tubes and Tube Products (continued): Whenever you replace the power tube(s): • Always have the amplifier’s bias voltage checked by a qualified service center. Improper bias voltage will cause degradation in performance and possibly damage the tubes and/or the amplifier.
Important Information About Tubes and Tube Products (continued): Survival Tips For Tube Amplifiers: To prolong tube life, observe these tips and recommendations: • Match the impedance of your speaker cabinet(s) to your amplifier. Improper impedance matching will contribute to early tube degradation and may cause premature tube failure. •...
Service Information If you are having a problem with your Blackheart Little Giant 5 Guitar Amplifier Head, you can go to our website (www.blackhearteng.com) and click on “Heart Surgery” for service information, or call 1-800-898-3211 during business hours (7 am to 5 pm PST, Monday-Friday).