Triode Frequency Conversion at FM-VHF
#triode
#frequency conversion
#FM
#VHF
#RF
#oscillator
#modulation
#transmitter
#receiver
#signal processing
No description available.
Beacon-transmitter
This transmitter is suitable for transmitter hunts, remote key finding, or radio telemetry in model rockets. It can be tuned to the two-meter band or other VHF bands by adjusting capacitor C1 and inductor L1. L1 consists of four turns...
Test Transmitter
The Test Transmitter (A3020) is a combination of three circuits designed to test the Subcutaneous Transmitter (A3019) and to analyze surface acoustic wave (SAW) voltage-controlled oscillators (VCOs). The A3020 incorporates the complete A3019 circuit in its central section, which closely...
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)....
coil coupled operation metal
The metal detector presented may represent a new category in its field. After some exposure, it has been recognized as such by those familiar with it. This device is based on a standard transformer coupled oscillator (TCO), which is why...
DF data transmission module and the super-regenerative receiver module
The DF data transmission module operates at a frequency of 315 MHz and utilizes a surface acoustic wave (SAW) resonator for frequency stabilization, ensuring high frequency stability. The frequency drift remains minimal, at only 3 x 10^-6, across a temperature...
AM FM Simultaneous Transmitter Using Digital ICs
An FM and AM transmitter integrated into a compact device utilizing the CD4001 integrated circuit. It broadcasts at 20 MHz for AM and 100 MHz for FM.
The described transmitter combines both Frequency Modulation (FM) and Amplitude Modulation (AM) capabilities into...
FM Listening Bug Kit
The schematic below illustrates a simple circuit that is straightforward to construct. One aspect that is not clearly represented in the schematic is the location of certain components.
This circuit design comprises a basic arrangement of electronic components, typically including resistors,...
FM bug circuit
This is just one of the many bugging devices available on the eavesdropping market. The range includes pen and pencil holders, trophies, framed pictures, and office furniture with false bottom drawers. These products are readily sold to fledgling companies, eager...
tv transmitter
The transmitter operates within the VHF and VLF frequency ranges on TV channels, though it has not been tested for UHF frequencies. The modulated sound signal spans 5.5 to 6 MHz, which can be adjusted by tuning capacitor C5. The...