continous wave rec circuit | Next Electronics

The circuit diagram presented is a highly sensitive wireless relay switch designed to control home appliances such as flush systems and hand dryers. This wireless switch operates without the need for a remote control. It functions by simply moving a...

Interfacing MaxTrac Mobile Radios to Repeater Controllers

This article outlines a reliable, straightforward, and universal method for interfacing Motorola mobile radios from the MaxTrac, Radius, and GM300 series with common repeater controllers. The information provided is also relevant for radio interfaces used in IRLP or EchoLink applications....

90-125 Mhz Crystal RF Oscillator

This circuit operates at a frequency range of 90-125 MHz and is particularly useful for VHF/UHF converters. It provides an output power of 5 to 15 mW. The circuit can utilize high-quality fifth- or seventh-over-tone crystal types. A ferrite bead...

RF-Radio Frequency 6

This circuit is designed to attenuate signal frequency, with a customizable range from 1 to 40 dB. For UHF band usage, it should be enclosed within a shielded frame, and capacitors C1 to C3 should be appropriately selected. The connection...

Field Strength Meter

This circuit is a wideband signal strength meter designed to respond to small variations in RF energy within the VHF spectrum. It is capable of detecting AM or FM modulation as well as a simple carrier wave. The circuit measures...

signal Can someone break down how this receiver works

The circuit described is a toy car receiver, which operates similarly to the transmitter but in reverse and with additional filtering. The receiver is tuned to a frequency of 27.145 MHz to capture signals at this frequency. Following the initial...

Battery Powered Tube Regenerative Receiver

The basic regenerative design is quite common. Before the schematic is created, there is a "concept stage," followed by the "available components stage," returning to the "concept stage," then moving on to the "mechanical/electrical layout stage," and finally sketching a...

4-18Mhz-converter

The unit consists of an RF amplifier Q1, a local oscillator Q2, and a mixer Q3. The two frequency bands are covered without a band switch by utilizing an intermediate frequency (IF) of 3.5 MHz. The oscillator operates within a...

Onkyo TX2500 mk II

An Onkyo TX2500 mk II receiver is being repaired for a friend, but it is experiencing issues with both AM and FM tuning, resulting in low reception quality. The Onkyo TX2500 mk II is a vintage audio receiver known for its...