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....

The presented speakers are distinguished for their small dimensions and their extraordinary sound. Our home space is often limited and prohibitive for large speakers. This limitation does not mean that we will stay without high Sound Quality. Its design is....

This circuit is an amplifier for small transmitters operating in the UHF band, specifically in the 450-800MHz range. The amplifier works in class A and we used the well-known Philips BLW33 transistor for its manufacture. The construction, although simple,....

Many times a small amplifier is needed to meet the needs of small spaces. This amplifier can be either mono or stereo, with this circuitry you can comfortably drive two small speakers. To build the amplifier you do not need anything but a few materials and a....

SGS Thomson's integrated TDA7294 is a high-frequency acoustic power amplifier, with true high-precision specifications, suited for all relevant applications. Its main feature is much higher output power than is usual in amplifiers with similar distortion....

This circuit consists of a 2048 radio remote control transmitter and the corresponding wireless receiver with very high reception sensitivity and low consumption. The combination of the two above gives a high-reliability remote control, ideal for security....

At the left side (input AC) goes the secondary of a 220 volt (primary) 18 Volt (secondary) / 3 Ampere mains transformer. The alternating voltage of 18 volts from its secondary transformer is rectified by the diodes D1, D2, D3 and D4, which are connected to a....

The power supply circuitry consists of a 220/2 * 18V / 3.5A transformer, a rectifier, a smoothing filter, a power amplifier, LM301, and two regulators LM317 and LM337. The theoretical of the circuit is shown in the figure. The voltage from the transformer is....

The sound is taken from a musical instrument in two different ways. Through a microphone that is placed in place by the instrument amplifier or via a direct connection between the instrument and the mixing console via a direct-box device. The benefits of....

The TDA 7294 of T-MICROELECTRONICS is a monolithic integrated circuit in a "Multiwatt 15" shell designed in principle to be used in amplifiers or class AB in high-fidelity applications such as stereo, active speakers, television receivers, and more. Thanks....

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....

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....

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....

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....

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....

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....

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....

A stereo power amp designed for use in portable players and radios. A 3V supply can be used to drive headphones providing 20mW in 32 Ohms per channel. ..

Figure (a) shows the output amplifier circuit 170W at 4 loads; LM4651 is a former circuit class D amplifier, a 28-pin DIP package, the internal equivalent circuit is shown in (..

FIG automatically shut down by the circuit is a MOS FET to achieve. When the headset is inserted, the contact off, MOS tube grid connected high, the tube guide pass., feet grou..

FIG dual-channel circuit LM378 dual operational amplifier composed of Europe. Supply voltage Ub 24V and 8 ohm load (or 16 Euro), the output power per channel 4W. Circuit with i..

Enthusiasts know that the headphones directly into the universal headphone jack to listen to VCD, the sound quality is not high and the tape player to listen to reason D headph..

Figure 4-20 is HAD250A-3 active speakers and amplifier circuit integrated amplifier circuit LM3886 thereof. The circuit uses 25V power supply, output power up to 50w 2, to meet..

Figure 1-98 is a double five-band equalizer circuit composed of a second connection. FIG IC1 IC14 respectively equalizer per channel utility voltage amplifier; ICLl, IC24, IC 2..

Electronic bass equalizer type of two quad op amp circuit, you can use TL084 high-speed operational amplifier circuit shown in Figure 9-680 left and right channels through R1, ..

DDR memory power supply circuit Shows the notebook DDR memory power supply circuit, the power control circuit chip MAX8632, the chip power supply terminal VDD is Sv (detection ..

DC shunt regulator power supply circuit Shown is a DC power supply circuit in parallel using the radio circuit, after the AC 22V output voltage by the step-down transformer 8V ..

Figure (a) is the use of a microprocessor power supply circuit constituted LT1587-3.45. Figure (b) is constructed using the LT1585 output voltage adjustable power supply. Figur..

Constituted by the peripheral circuits MIC5158 simple 5V input, 3.3V/10A output linear regulator circuit is shown. When the circuit when the input voltage Ui 5V, plus the N-cha..

Digital Cameras -DV machine power supply circuit It shows a digital camera/DV machine power supply circuit, the circuit MAX1800 chip to control the core. The figure shows that ..

Constituting simple LM3915 audio power meter circuit diagram Note: If the internal resistance of 4 speaker when, Rx take 10k If the internal resistance 8 speaker when, Rx take ..

Dual drive ICs 10LED level meter circuit Dual-drive IC is shown in the IO LED level meter circuit, the figure of two TLM8101 driver IC can also be used instead. ..