SR Lite RX V6.2 40/30m Builders circuit

Everything appeared to be functioning normally. The half-duplex operation and pedal control in telegraphic mode allowed the operator to transmit while listening during pauses, seamlessly switching to the standard mode by simply pressing the pedal at the right moment. Previously,...

receiver architectures

Various architectures of receivers have been proposed in literature, but the most popular architectures among them, such as Heterodyne, Homodyne, Wideband-IF, and Low-IF, are presented here. The Heterodyne receiver architecture utilizes two frequencies: the incoming radio frequency (RF) signal and a...

140W amateur radio linear amplifier 2-30Mhz

This inexpensive, easy-to-construct amplifier utilizes two MRF454 devices. It is specified for an 80 W power output with a 5 W input drive at a frequency of 30 MHz and operates on a 12 V DC supply. The amplifier circuit is...

KG6MVBs Rig to Computer interface

This document outlines a modification that connects a radio to a computer. It is important to proceed with caution and recognize that the responsibility for any consequences lies with the user. The design has been tested on an Icom 718...

schematic of programmer radio

This time, information will be shared about the schematics of radios, specifically the schematic of a programmer radio, along with the latest information available on Onmilwiki. The schematic of a programmer radio typically includes various components essential for its operation, such...

80M

This 80M receiver design incorporates the necessary switching mechanisms to enable the SSB filter and first intermediate frequency (I.F.) amplifier to function for transmission purposes. The receiver stages, from the radio frequency (R.F.) input to the speaker output, will be...

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...

Amateur Radio

This device features crystal-controlled transmitters and tunable superregenerative receivers equipped with RF preamplifiers, designed for operation on the 2, 6, or 10 meter amateur bands. The highly sensitive receivers can detect signals as low as 1 microvolt, providing complete quieting...

Radio remote control circuit

The receiver circuit depicted in the figure requires the insertion of a plug into the radio headphone jack. When the radio receiver detects a signal from the transmitter, an audio signal is output from the jack. This signal is then...