Duplexing the UHF Micor
#UHF
#duplexing
#radio
#frequency
#communication
#wireless
#transmitter
#receiver
#telecommunication
#RF
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Closed-Loop Automatic Power Control for RF Applications
This is a circuit for Closed-Loop Automatic Power Control for RF Applications. The circuit utilizes a log detector (AD8318) and a variable gain amplifier (VGA) (ADL5330).
The Closed-Loop Automatic Power Control (APC) circuit is designed to maintain a consistent output power...
Wireless Telephone Line Spy
This is a phone bug circuit. This wireless telephone line spy circuit can be used to transmit the phone conversation to a nearby FM radio. This circuit must be...
The phone bug circuit is designed to intercept and transmit audio signals...
UHF amplifying circuit diagram
The circuit depicted in the figure operates within a frequency range of 400 to 850 MHz, designed as a UHF amplifying circuit. For optimal performance and results, it is recommended that the circuit be manufactured using silver-tin processing techniques.
The UHF...
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...
Sensitive RF Voltmeter Probe
Sensitive RF Voltmeter Probe Circuit. This circuit measures RF voltages beyond 200 MHz and up to approximately 5V.
The sensitive RF voltmeter probe circuit is designed to accurately measure radio frequency (RF) voltages in the range exceeding 200 MHz, with...
1W UHF Linear Amplifier with BLW33
This circuit serves as an amplifier for small transmitters operating within the UHF band, specifically in the 450-800 MHz range. The amplifier operates in Class A, utilizing the well-known Philips BLW33 transistor. Although the construction is relatively simple, it requires...
Noisy Regen Receiver
The following circuit illustrates a Noisy Regenerative Receiver Circuit Diagram. Features include a Noisy Regenerative Receiver Circuit, which simplifies the process of...
The Noisy Regenerative Receiver Circuit is designed to amplify weak radio frequency signals while also incorporating a regenerative feedback...
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...
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...