30MHz 500 watt linear tube amplifier
This is the circuit of a 500 watt linear amplifier, based upon a design by Frits Geerligs, PA0FRI. The circuit uses four PL519 TV line output valves in a very s...
Old Valve Amplifier
The schematic shows a valve / tube audio power amplifier and a type 390 Rectron B eliminator....
AGC / S-Meter
You can build an automatic gain control AGC for the superhet receiver with only a few additional components. The first AGC circuit is more universal. It is suit...
audio amplifier with NE592
The broadband amplifier NE592 can be used also for building a simple selective audio amplifier. By means of the +6 V and +12 V supply voltages a DC coupling bet...
IF Amplifier using NE592
In this circuit, an NE592 acts as an IF amplifier. DC coupling between mixer and amplifier is practical beacuse different + 6 V and + 12 V supply voltages are u...
50 Watt power Amplifier
This simple audio power amplifier was originally designed for a circuit board workshop, conducted by the OSU IEEE Student Group. At the workshop, 20 participant...
Fuzz Face
This is simple almost beyond belief for distortion devices. Two transistors, four resistors, three capacitors, and two controls make all that tone. The first tr...
Basic Microphone preamplifier
This preamplifier amplifies the signal from a microphone, an amplifier so that it can be further strengthened. The circuit supplies an output signal line.
With...
741 Microphone amplifier
This preamplifier uses a type of IC 741, and can boost a microphone signal to line level.
The microphone signal is connected to the "input" put. Any power for ...
Headphone Amplifier LM741
Here you will find a design for a headphone amplifier. The supply voltage is 12 volts. I have the circuit taken as 5 watt amplifier, but after a test showed tha...
Tube Headphone Amplifier ECC86
Because it seemed fun to me also try the so-called "high-end tube technique to highlight here, I agree with some parts from the stock went to work. A second poi...
Amplifiers connecting Bridge
This is a circuit that ensures that you can connect two amplifiers together so you get more power. When called in bridge linking two amplifiers plus you can lin...
40W audio amplifier using TDA2030
This amp delivers a lot of power and uses 1 IC and two power transistors.
The circuit consists of an amplifier IC (a TDA 2030A) and a power stage consists of t...
250mW audio Amplifier
This design can be used as a small booster. The amplifier is built around a balance stage.
The quiescent current is set by diodes D1 and D2. The simplicity of ...
20 Watt audio Amplifier
This is a standard amplifier based on LM 1875. It can deliver 20 W, with an 8 ? speaker and 60V power supply even 30 W.
The capacitors C4 and C5 should prefe...
10 Watt Amplifier with TDA2003
This simple amplifier can be used for many things. Together with Equalization and (small) speakers good for the computer instance. The circuit uses IC TDA 2003 ...
1 Watt amplifier using LM386
This circuit is a signal line so that you reinforce with a small speaker can control.
The LM 386 is a number of versions available. LM 386N-1 can provide a pow...
200 Watt audio power amplifier
Here i propose a project of an AB class power amplifier, at its simplest, assembled with common compoments (not very expensive), based on traditional diagrams :...
Balance input with Gain
Circuit with electronic symmetrical input, with possibility of regulation of the gain from the pontesometer RV1 and the level of signal with the RV2. The qualit...
Tube Preamplifier with ECC88
A very good circuit of pre-preamplifier, for amplification of signals from heads of Moving Coil. It uses the two departments of tube ECC88, association paralle...