Browse over 10,000 Electronics Projects using the Page Numbering provided at the bottom of each Page.

The 6N1P OTL Headphone Amplifier

The 6N1P OTL Headphone Amplifier

Like the original Morgan Jones amp, the original 6N1P OTL had trouble driving low impedance headphones. This version of the 6N1P OTL amp features a re-balanced output stage that gets all of my headphones plenty loud.
If you can read an op-amp circuit diagram, you should be able to read this tube circuit with no trouble. The 6N1P family are “dual triodes,” each tube containing two separate amplifiers in the same device. Each triode has three circuit connections: a source of electrons (“cathode”), an output that receives the electron flow (“anode” or “plate”), and a “grid” which controls the flow. A separate wire filament (the orange glow in tubes) heats the cathode to make it give off electrons.

Figure 2 shows the tube pin layout. The layout is shown from underneath, from the bottom of the tube. This makes sense, since that is the view you have of the tube socket when wiring it. Pins 1, 2, and 3 are the anode (A), grid (G), cathode (K) for the first triode (T1) inside the tube. Pins 4 and 5 are for the filament heater (H). Pins 6, 7, and 8 are the anode, grid and cathode for the second triode (T2). Pin 9 is for shield (S) between the two triodes in the tube, and in this amp should be connected to ground. In the schematic, all the cathodes are shown on the bottom (the little hat shape signifies the heater filament), grids in the middle, anodes on top.

Visit Here for more.

 

More Articles to Read

Single-Sided USB Charger
Single-Sided USB Charger
A FPGA controlled RGB LED MATRIX for Incredible Effects – the Hardware
A FPGA controlled RGB LED MATRIX for Incredible Effects – the Hardware
Using Nanotimers to Reduce IoT System Power Consumption by an Order of Magnitude
Using Nanotimers to Reduce IoT System Power Consumption by an Order of Magnitude
Replace a microwave’s beeping with the Windows XP startup sound
Replace a microwave’s beeping with the Windows XP startup sound
A DIY Laser Scanning Microscope
A DIY Laser Scanning Microscope
Reverse-engineering the surprisingly advanced ALU of the 8008 microprocessor
Reverse-engineering the surprisingly advanced ALU of the 8008 microprocessor
ESP8266 LED lighting: QuinLED v2.6 PCB
ESP8266 LED lighting: QuinLED v2.6 PCB
Switching LVDS Graphics in a Laptop Computer
Switching LVDS Graphics in a Laptop Computer
Teleknitting: TV-based string art
Teleknitting: TV-based string art
DIY Bubble Machine
DIY Bubble Machine
Start your day with Nerf target practice!
Start your day with Nerf target practice!
Teardown of a Peaktech 6225A
Teardown of a Peaktech 6225A

Top




Shares