Active Antenna for HF-VHF-UHF circuit

This simple, inexpensive, wideband RF amplifier provides 14 dB gain on two meters without the use of tuned circuits. The RF amplifier described operates within the two-meter band, which typically spans frequencies from 144 to 148 MHz. It is designed to...

1.5 Volt Tracking Transmitter

A 1.5 Volt tracking transmitter utilizing simple circuits. The current draw for this tracker is 3.7 mA, allowing the 1.5V button cell to have a prolonged lifespan. The 1.5 Volt tracking transmitter is designed to operate efficiently with a low current...

Simple Valve MW Transmitter circuit 30W

The simplicity of this transmitter, combined with its high performance, makes it particularly interesting. It has an output power of approximately 30 W, and under normal conditions, with the appropriate antenna and handling, it can achieve a range of 30...

TV RF Amplifier 5W Circuit With BLW98

The circuit is designed for driving small UHF TV transmitters, providing a gain of 7 dB and capable of amplifying signals within the frequency range of 470-860 MHz. Key components include resistors, capacitors, and transistors. This circuit serves as a critical...

20W 1296Mhz Amplifier Module Circuit

Using a Mitsubishi M57762 amplifier module, this amplifier delivers 20 W output at 1296 MHz. A single 12 V nominal power supply can be used. The Mitsubishi M57762 is a high-performance RF amplifier designed for applications requiring significant power output at...

MICRF112 MICRF112: QwikRadio ?® UHF ASK/FSK Transmitter

The ADC12038 family consists of 12-bit plus sign sampling Analog-to-Digital Converters (ADCs) featuring serial input/output. These devices are equipped with configurable analog multiplexers that can accommodate 2, 4, or 8 input channels. Upon request, these ADCs can execute a self-calibration...

HF phone rig for 20-40 meter band

A simple project, within most of homebrewers capabilities. Very simple tuning, a single stage to align, besides VFO frequency adjusting. Easy to find, cheap components. Reduced dimensions and low power requirement, a totally portable rig. It's worth while to spend...

Remote Control Transmitter Circuit

This transmitter can be utilized for multiple applications. An INS8048L microprocessor produces various codes based on keypad inputs. These codes are modulated onto a 40-kHz carrier frequency. Additionally, Q1 drives infrared LEDs LED1 and LED2. The transmitter circuit primarily consists of...

GE/MACOM MASTR-III VHF Station

This article provides conversion instructions for radio model GE/MACOM MASTR-III Group 2 (150.8-174 MHz) Repeater or Base, Combination Number SXS, to enable it to operate effectively in the 144-148 MHz range. It is important to note that this document is...