Power booster
Power booster is capable of driving moderate loads. The circuit as shown uses a NE5535 device. Other amplifiers may be substituted only if R-l values are change...
Voltage controlled variable gain amplifier
The tee attenuator provides for optimum dynamic linear range attenuation up to 100 dB, even at f = 10...
Tone-control audio amplifier
The circuit makes excellent use of the high slew rate, wide bandwidth, high input impedance, and high-output voltage capability of the CA3140 BiMOS op amp. The ...
10w 225-400mhz linear amplifier
This broadband amplifier covers the 225-400 MHz military communications band producing 10 watt RF output power and operating from a 28 volt supply. The amplifie...
6Meter kilowatt amplifier
The amplifier uses a grounded grid circuit with either the Eimac 3CX1000A7 or 8877, ceramic/metal triodes intended for linear service in the HF and VHF ranges. ...
125Watt 150Mhz amplifier
This amplifier operates from a 28 Vdc supply. It has a typical gain of 12 dB, and can survive operation into a 30:1 VSWR load at any phase angle with no damage....
6-Meter preamplifier provides 20db gain
Cl, C2, and C3 are miniature ceramic or plastic trimmers- Tl (main winding) is 0.34 µ,. Use of 11 turns of no. 24 enameled wire on a T37-10 toroid core. The ...
5W RF power amplifier
Numbered components are so designated for PC-board layout purposes. C5 and C8 are disc ceramic. C6 and C7 are tantalum or electrolytic. Rl, R2 and R3 are Vi W c...
1 Watt 2.3 ghz amplifier
Simplicity and repeatability are featured in this 1 watt S-band amplifier design. The design uses an MRF2001 transistor as a common base, Class C amplifier. The...
Low-distortion 1.6-30mhz ssb driver
The amplifier provides a total power gain of about 25 dB, and the construction technique allows the use of inexpensive components throughout. The MRF476 is spec...
Power amplifier
For most applications, the available power from op amps is sufficient. There are times when more power handling capability is necessary. A simple power booster ...
4-channel amplifier
Rear channel "ambience" can be added to an existing stereo system to extract a difference signal (R - L or L - R) which, when combined with some direct signal (...
Walkman amplifier II
The gain of the low-cost IC is internally fixed so that it is not less than 34 dB (50 times). A unique input stage allows input signals to be referenced to grou...
Walkman amplifier
The gain of the low-cost IC is internally fixed so that it is not less than 34 dB (50 times). A unique input stage allows input signals to be referenced to grou...
Audio booster
The amplifier's gain is nominally 20 dB. Its frequency response is determined primarily by the value of just a few components—primarily Cl and Rl. The va...
Low power audio amplifier
The amplifier operates from supplies ranging up to 12 volts, and operates (with reduced volume) from supply voltages as low as 1.8 volts without having distorti...
Bull horn
The input audio signal is fed to pin 3 of Ul, an LM386 low-voltage amplifier, via C3 and Rl. Potentiometer Rl sets the drive or volume level. Ul, which serves a...
25 Watt amplifier
Transistors are used for current sources. Base drive for these transistors is derived from the main power supply VA, so that their collector current is proporti...
Audio power amplifier
Output-clamp diodes are mandatory because loudspeakers are inductive loads. Output LR isolation is also used because audio amplifiers are usually expected to ha...
6w audio amplifier with preamplifier
The monolithic integrated audio amplifier circuit is especially designed for portable radio and recorder applications and delivers up to 4 W in a 4 ohm load imp...