A Direct-Coupled Amplifier with Cathode Follower by Raymond H. Bates
The Direct-Coupled 6V6 Tube Amplifier is designed to utilize a 6V6 vacuum tube, which is known for its warm sound and high fidelity in audio amplification. This amplifier incorporates a cathode follower stage, which serves to buffer the output of the amplifier while maintaining a high input impedance and low output impedance. The direct coupling between stages eliminates the need for coupling capacitors, allowing for a more seamless signal transfer and improved frequency response.
The circuit typically consists of a power supply providing the necessary high voltage for the 6V6 tube, along with a filament supply for heating the tube. The input stage may include a preamplifier section, which is often based on another tube, such as a 12AX7, to provide initial signal amplification. The output stage, featuring the 6V6, is responsible for driving the speakers, delivering rich audio output.
The cathode follower configuration is implemented to drive the load efficiently, ensuring that the output signal retains its integrity without significant distortion. This configuration also allows for better voltage swing capabilities, which is crucial for audio applications.
Overall, the Direct-Coupled 6V6 Tube Amplifier with Cathode Follower is a classic design that exemplifies the advantages of tube technology in audio amplification, offering both aesthetic appeal and high-quality sound reproduction. Its design principles remain relevant in modern audio applications, reflecting the enduring legacy of vacuum tube amplifiers.A Direct-Coupled 6V6 Tube Amplifier with Cathode Follower by Raymond H. Bates from Radio & Television News magazine November 1949 🔗 External reference
Related Circuits
The TDA4935 is a bipolar stereo amplifier integrated circuit (IC) that can be configured as either a 2x15W stereo amplifier or a 30W mono BTL (Bridge-Tied Load) amplifier. This IC includes built-in circuitry for overload protection and over-temperature shutdown....
Preamplifier with LA3161. Preamplifiers are utilized to amplify low-level signals, such as those from microphones and tape heads, before they are sent to power amplifiers. The LA3161 is a versatile integrated circuit designed for use in audio preamplification applications. It...
This circuit is a general-purpose 10-W audio amplifier designed for moderate-power public address (PA) systems or as a modulator in an AM transmitter. By applying higher voltages and adjusting the bias resistors, it is possible to achieve output power...
That circuit protects the overdriven signals going into an amplifier. Instead of a zener diode, we use a transistor. That way we ensure that the above the ordinary input voltages (1 volt r.m.s.) can be achieved without distortion. Also,...
This architecture allows for a wide tolerance in component selection, enabling the use of various components that may be readily available. The transistors utilized can be any NPN type power transistor, excluding Darlington configurations. The output power is approximately...
The described shunt-feedback configuration facilitates the straightforward incorporation of frequency-dependent networks, enabling a practical and unobtrusive switchable tilt control as an optional feature. When switch SW1 is in the first position, a gentle shelving bass boost and treble cut...