Vacuum Tubes Valves
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Vacuum-Tube Valves Circuits
Vacuum-Tube Valves Circuits
High Voltage Power Supply for Valve Preamplifiers
The amplifier feeding to the final amplification stage is performed with unstabilized voltage. The output stage, due to push-pull operation, has a large rejection of the supply voltage. The various other steps, however, do not have the same rejection and introduce unwanted noise. So the pre-amplification stage is good to be powered with a...
Valve Transmitter circuit 70W
This transmitter with a good antenna and under proper conditions of use may have a range of more than 45km. The configuration is made by the rise of the output lamp, which makes it advantageous as regards the fidelity of the emitted signal. The 6V6 lamp is used in the oscillation step. The coil L1 will be commercially available as a 6SA7...
Valve Tube Audio/Modulation Amplifiers 15W and 35W
These two amplifiers are of very good quality, simple and economical in their manufacture. They have two inputs for a 4mV (500KΩ) sensitivity microphone and an input for any 200mV (1MΩ) sound source, that is, the first input is for speech and the second one for the music. These inputs are set with the potentiometers P1 (the microphone) and P2...
50W Tube-Valve SW transmitter
This transmitter works in the short waves from 6MC / S to 22MC / S. Coil L1 is the short wave oscillating coil of the 6SA7 lamp and you will find it ready for trade. Capacitor C1 is variable with a capacity of 0-500pF. The coil L1 consists of 13 coils 3cm in diameter and 1mm thick wire. Capacitors C1, C2, C3 and C4 are variables with a capacity...
100W AM Valve Transmitter circuit
For our strong construction with the two 807 we do not need words. We all know the performance of such a machine. In this construction we have the peculiarity of high upward tension and independent coupling. On the output lamps, resulting in the output power being increased by several watts. We certainly will not talk about 130-150 watts, but we...
200W Valve RF Transmitter circuit
This transmitter consists of three stages. The step of the oscillator with the 6L6 lamp, the amplifier isolator with the lamp 807 and the final stage of the transmitter with the 811 lamp. The coil L1 is requested by the market as a coil of the 6SA7. The various RFCs are sold on the market and used to isolate the feed device from the generated...
300W Valve RF Transmitter circuit
It consists essentially of three stages and gives the antenna a power of 300 WATT, provided it is properly tuned. The first tier is an oscillator that has an oscillating coil L1 that will be required by the market as a 6SA7 coil. The coils L2 and L3 consist of 60 coils of 1mm cross-section wire wound on a 5cm diameter tome so that they have some...
255W Valve RF Transmitter circuit
This transmitter of 255W is depended on the coils we put at it to work in both the middle and the short waves. The power in the antenna is 255W and includes 4 states. The first consists of the EF80 that works as a COLLPITS CLAPP oscillator. Frequency selection is done in a somewhat unusual way: Instead of the variable capacitor, it uses a...
5W Valve RF Transmitter circuit
In this circuit, the wearer assembly consists of only one lamp, 6V6 or 6L6, which acts as an oscillator and as an output amplifier at the same time. Coil L1 is the medium wave oscillation coil. Of 6SA7. The coil L2 consists of 50 spools wrapped on a cylinder covered with a 3 cm diameter insulating material. The diameter of the wire is 0.5mm. The...
15W Valve Modulator Amplifier circuit
The output of this modulator consists of two 6AQ5 lamps in a PUSH-PULL arrangement with a maximum output of 15W. 6C4 is used as a reversing lamp. The pre-amplifier role is played by the double-stage ESC83. The potentiometer R1 performs voice volume adjusters and a crystalline microphone is connected to the amplifier input. The amplified...
Valve/Tube Low Frequency amplifier 30W
The amplifier of this design is 30 Watt and is suitable for microphone-inducing. It accepts a crystalline microphone and can be used for speeches, lectures, as a transmitter modulator and generally where it can be useful as a common frequency amplifier. The frequency range it amplifies starts at 50 C / S and reaches 10 KC / S. At these...
50W AM Valve RF Transmitter circuit
This transmitter consists of 5 in total bulbs. 6L6 works as an oscillator. Subsequently the oscillation is guided to the guide grid of 807 which acts as the ultimate amplifier and is the transmitter output lamp. The amplifier consists of the ECC83 double-stage as pre-amplifier and 6L6. The power supply feeds both the transmitter and the...
100W AM Valve RF Transmitter circuit
This transmitter, as shown in the drawing, consists of a 6V6 as an oscillator, then the signal excites an 807 which acts as a buffer. The final step consists of two 807 in Push-Pull. The amplifier consists of three in series double-triodes ECC83 and finally two 6L6 in Push-Pull. The transmitter uses two power supplies, which is why we use two...
High Fidelity Valve audio Amplifier 40W
The design of the 40W Valve Amplifier is shown in the figure. In valve amplifiers the predominant feature is the strong presence of the second and third harmonics, sometimes in agreement with the fourth and fifth, but always with a much wider width. Higher harmonics of the fifth are not significant until the overload exceeds 12dB. The...
Simple Valve MW Transmitter circuit 30W
The simplicity of this transmitter compared to its very high performance makes it very interesting. Its output power is about 30 W and its range under normal conditions, with proper antenna and handling, reaches 30 km. The oscillator is the PL 84 which provides enough signal to normally excite the output light. Coil L1 is the oscillation coil of...
Construction 25W single-ended Class A tube amp circuit diagram EL156
Danji mellow, transparent, natural sound, sweet, sincere, tireless listening to long, full of humane color. In building a harmonious and beautiful life, tube amps have become a
DC-coupled single-tube amplifier
DC-coupled single-tube amplifier (l) single-tube coupling the DC amplifier so-called single-tube DC-coupled amplifier circuit means only consist of a transistor, the basic comm
Tube amplifier input voltage input
Depending on the input impedance can be divided into a high-impedance input and low impedance input in two ways. Its major input in various audio equipment to the requirements
Composite tube transistors stabilized power supply circuit
Composite pipe can be reduced to promote the adjustment of the control current of the tube.
Class push-pull tube power amplifier circuit diagram 2A3A
FIG. 2A3A low direct thermal resistance transistor, its resistance is only 800, so the output transformer primary screen to screen to load impedance 3.5k Cong. Push-pull amplif
FET used as a silencer tube headphone circuit
FET used as a silencer tube headphone circuit Field-effect transistor is shown as a headphone circuit silencer tube. L from the digital signal processing circuit, R audio signa
CPU number of liquid crystal display driver circuit example tube
Examples of the structure of a number of liquid crystal display drive circuit CPU tubes.
Vented 2a3p 2a3pp-15w Tube Amplifier circuit diagram
Elliot vented 2A3PP line, is also very simple, the key is the quality of the output of cattle. Use 3KPP output cattle, fixed bias (a 62V), output power 15W. 2A3PP suited for th
Both tube OTL amplifier 01
Electrical properties of the tube with good quality output transformer has a great relationship, it is well known thing. Overseas equipment commodities have simply cancel the s
Display tube using a constant current circuit for steady flow tube
Display tube using a constant current circuit for steady flow tube
300B tube single-ended Class A amplifier circuit diagram
300B tube single-ended Class A amplifier circuit is as follows:
The use of low-power tube amp tube radios restructuring
2W resistors can be used around a metal or carbon film resistors fortunate optional paper referred capacitors, polypropylene capacitors, voltage of 400V on the nozzle; capacito
8W + 8W tube amplifier circuit
Preamplifier VE1 the machine with low muscle low R double triode 6N6 (left and right audio channels each with its half). Working state design in the CPI. Promote
1000 m single-tube FM transmitter circuit diagram of oscillation
1000 m single-tube FM transmitter circuit diagram of oscillation:
50WOTL amplifier circuit
Circuit shown in Figure. Higher technical specifications of the circuit, is a very good OTL amplifier circuit. The frequency response of the
OTL amplifier circuit diagram
The following diagram shows an output power of radio 1OOmW common OTL amplifier circuit. The circuit output transformer, and a capacitor together with the speaker units. Frequency characteristics OTL amplifier
Rhyme M100 merger 10 watt tube amplifier circuit
Ml00 circuit from the point of view, it is a typical tube circuit. It's preamp, input-stage amplifier stage are Cape through common cathode amplifier TAIL inverter stage, the last stage power
Audio Filters Circuits
Audio Amplifier Circuits
Audio Oscillator Circuits
Audio Mixer Circuits
Audio Equalizer Circuits
Audio Tone Balance Circuits
Beeper Buzzer Circuits
Musical & Effects Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
DIY HV Variable Capacitor
DIY PMA Alternator Plans
Digital Signal Integrity