AM transmitter project circuit
#AM transmitter
#RF circuit
#radio frequency
#transmitter
#modulation
#broadcast
#antenna
#oscillator
#audio signal
#carrier wave
No description available.
oscillation Oscillator circuit
The first thing to understand is how capacitor C1 is related to the resonance frequency f of the circuit. It appears that selecting a frequency allows for the automatic determination of the necessary value for C1. There are uncertainties regarding...
Little dipper
The circuit consists of two fundamental components: the oscillator and the detector. The oscillator employs a Field Effect Transistor (FET) in a Colpitts configuration. The energy circulating within the oscillator's tank is coupled through capacitor C4 to the detector circuit,...
Metal detector circuit diagram 8
The metal detector circuit consists of a probe oscillator, a PLL (phase-locked loop) circuit, and an audio alarm circuit. The probe oscillator includes a detection coil (L), transistor (V1), and several resistors (R1 to R3) and capacitors (C1 to C5)....
Simple Short-Wave Transmitter
This low-cost short-wave transmitter is tunable from 10 to 15 MHz using a ½J gang condenser VC1, which sets the carrier frequency in conjunction with inductor L1. Frequency trimming is achieved with VC2. The carrier signal is amplified by transistor...
Transmit Time Limiter
This circuit prevents transmissions that are too long, which can cause timeouts in repeaters and/or occupy a communication channel for an excessive duration. During transmission, the PTT (push-to-talk) line from the microphone is grounded, resulting in one input of the...
Valve Transmitter circuit 70W
This transmitter, equipped with a quality antenna and utilized under optimal conditions, can achieve a range exceeding 45 km. The configuration benefits from the output lamp's elevation, enhancing the fidelity of the transmitted signal. The 6V6 lamp is employed in...
Metallic pipe detector
This circuit employs a 15-kHz oscillator coil. When metal is removed from the energy field, the oscillator voltage is rectified and compared to a reference. A decrease in oscillator voltage activates comparator IC2, causing D4 (LED) to turn off.
L1 consists...
Loop-stick Antenna for AM band
Wound on a 3 foot length of PVC pipe, the long loopstick antenna was an experiment to try to improve AM radio reception without using a long wire or ground. It works fairly well and greatly improved reception of a...
1-2Mhz broadcast transmitter
T1 is a low impedance output transformer with a conversion ratio of 5000 to 8 ohms.
The low impedance output transformer, T1, is designed to match the output of an audio amplifier to the impedance of the speaker load. The specified...