lna mixer circuit | Next Electronics

A pair of BC548 transistors has been utilized in this circuit. Although they are not specifically designed for RF applications, they still provide satisfactory performance. An ECM microphone from Maplin Electronics, model FS43W, has been employed. This is a two-terminal...

Simple Cable TV Amplifier Circuit

This cable TV amplifier circuit is an RF amplifier designed for quick installation between two coaxial cables. Both the input and output impedances are compatible with 75-ohm cables. The main amplifier is the T1 transistor, while T2 functions as an...

Original 2N2/40 Schematic Diagrams

This section describes the components of the receiver, which includes the post-mixer amplifier, variable crystal filter, intermediate frequency (IF) amplifier, product detector, local oscillator, receiver muting, and audio amplifier. The transmit section features the local oscillator, transmit single balanced mixer,...

Telegraph Transmitter in the Pilot Radios Radio Design magazine 1930s

The TPTG transmitter has been transformed into a modern TNT model. This transmitter can utilize the existing K-111 power pack for both the transmitter and receiver, eliminating the need for a separate power supply unit. Building this compact transmitter allows...

Circuit for power linear RF amplifier with BLY90

This circuit functions as an RF power amplifier designed to operate with a power supply capable of delivering 13 volts at a current of 10 amperes. Careful assembly of the power source is essential. It utilizes a shielded transformer and...

80M And 40M Cw-Ssb Receiver Circuit

This direct-conversion receiver utilizes a TDA7000 integrated circuit (IC) and incorporates an LM386 audio amplifier. The TDA7000 serves as the mixer and local oscillator (L.O.) section. The frequency control can be achieved using either an air variable capacitor or a...

RF amplifier and filter for 2.5MHz

By using transformers, both voltage feedback and current feedback can be applied. An article by DJ2LR Ulrich Rohde in Ham Radio, November 1979, provides details about this circuit. For the 2.5 MHz to audio converter, the transformation ratio from drain...

rf amplifier with op amp

The operational amplifier (op-amp) has a significant history, particularly with the 741/301 series, which has been popular for approximately 20 years due to its ease of calculation (gain calculation), affordability, and simplicity of construction. The versatility of op-amps allows for...

41-72MHz micro-receiver ( MC3362 )

This receiver weighs about 6 g, used in 41 and 72 MHz, met a great success with readers of the magazine. The RX22 is the subject of these lines is improved RX20. Adding a preamp-HF improving sensitivity. Establishment of an...