transverter unit circuit | Next Electronics

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...

Remote control transmitter circuit

The circuit composition of a specific remote control transmitter is illustrated in a diagram. The transmitter primarily consists of a large-scale integrated circuit chip (D1, THBT-T01), a 4.5 kHz crystal oscillator, a 32 kHz crystal oscillator, a liquid crystal display...

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...

tx atv

This project was developed in collaboration with several other operators, particularly Marco IW1DGG, within a local radio club. The initial goal was to create a simple transmitter capable of providing sufficient power to excite the local ATV repeater. However, suitable...

50MHz crystal bug

This bugg is based on my previous 3-transistor transmitter. This bugg unit has many advantages. The transmitter uses a crystal 46.515MHz to hold a steady frequency. The frequency can be fine-tuned by some 100kHz. The transmitter can send data and...

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...

472 kHz Transmitter

The exciter board is based on an Arduino WSPR exciter. Plans are underway to create a more advanced stand-alone board using inexpensive Chinese DDS modules available from eBay. Currently, a DDS60 by AmQRP is being utilized. The output from this...

crystal Op Amp Radio

Here is a simple radio that is easy to build and inexpensive. In fact, you probably have all the parts you need in your junk box. You'll be surprised at the great reception with this little set. More: The antenna...

RF Field Strength Meter Circuit

A sensitive and reliable RF field strength meter is an invaluable instrument in amateur radio and radio-controlled model applications. This field strength meter is utilized to align antennas for optimal gain and to determine the transmission range of radio controllers....