ReviewsSuperheterodyne

Tecsun H501 Digital Worldband AM/FM Shortwave Longwave Radio with SSB Reception, Dual Speakers, & MP3 Player, Matte Black

【HF VFO /RF Generator 】It has 10kHz to 220MHz working ranges. 0.5PPM high precise Tcxo clock, the frequency is more accurate. Tuning step of 1Hz, 10Hz, 1kHz, 5kHz, 10kHz and 1MHz..
【VFO for Ham SDR HAM QRP Transceiver】 Used as a local oscillator on Homebrew radio receivers (such as superheterodyne, SDR, direct conversion and Homebrew QRP transceivers) ， a simple RF/clock generator for calibration reference or clock generation，a common 128x64 I2C OLED SSD1306 display and Si5351 module..
【Adjustable】Intermediate frequency (IF) offset (+ or -) is adjustable.The bar graph of the signal meter through the analogs input (ADC).I2C data transmission, only need 2 lines it can be connected to the display, with high stability and accuracy of frequency generation.
【20 Band Presets】Equipped with generator function mode.Initial frequency, end frequency, sweep-frequency-step can be set. 20 band presets (shortcuts) for BCB and HAM frequencies.RX/TX mode selector for Homebrew QRP transceivers..
【 Guarantee】 We providing 100% satisfactory service to every customer to make sure our customer can purchase with confidence. If you have any questions, please contact us, we will reply and improve in time..

【HF VFO /RF Generator 】It has 10kHz to 220MHz working ranges. 0.5PPM high precise Tcxo clock, the frequency is more accurate. Tuning step of 1Hz, 10Hz, 1kHz, 5kHz, 10kHz and 1MHz..
【VFO for Ham SDR HAM QRP Transceiver】 Used as a local oscillator on Homebrew radio receivers (such as superheterodyne, SDR, direct conversion and Homebrew QRP transceivers) ， a simple RF/clock generator for calibration reference or clock generation，a common 128x64 I2C OLED SSD1306 display and Si5351 module..
【Adjustable】Intermediate frequency (IF) offset (+ or -) is adjustable.The bar graph of the signal meter through the analogs input (ADC).I2C data transmission, only need 2 lines it can be connected to the display, with high stability and accuracy of frequency generation.
【20 Band Presets】Equipped with generator function mode.Initial frequency, end frequency, sweep-frequency-step can be set. 20 band presets (shortcuts) for BCB and HAM frequencies.RX/TX mode selector for Homebrew QRP transceivers..
【 Guarantee】 We providing 100% satisfactory service to every customer to make sure our customer can purchase with confidence. If you have any questions, please contact us, we will reply and improve in time..

▶Cross Band Repeater - KG-UV9D Plus is a advanced two way radio which can repeat VHF to UHF or UHF to VHF. It can be used as a small movable repeater, very helpful for extend the talk range.FCC Id:B1703024KG-UV9D Plus.
▶Anti-interference Technologies - The advanced Anti-interference technologies are used in KG-UV9D Plus. The superheterodyne receiver makes KG-UV9D Plus performance great noise reduction. However, the High sensitivity also help KG-UV9D Plus receive the week signal..
▶Memory Channels 999 - There are 999 channels in KG-UV9D Plus. The large channel memory makes you can store more channel list. It is a advanced channel storage in analogue two way radio.
▶Mplitude-frequency PTT settings - There are two PTT keys designed in KG-UV9D Plus. One control Main Frequency, another control sub frequency. This advanced design make user more convent communicate in different area..
Package Include: 1x KG-UV9D Plus 1x LI-ion charger Battery Pack 2x Antenna 1x Belt Clip 1x Wrist Strap 1x LI-ion 1xCar Charger 1x User Manual.

...r Detection, Advanced Digital Signal Processing, AutoSensitivity Mode Automatically Reduces False Alarms, EZ-Programming Allows Instant Customization.
Operating Bands : X-band 10.525 GHz 25 MHz, K-band 24.150 GHz 100 MHz, Ka-band 34.700 GHz 1300 MHz, Laser 904nm, 33 MHz Bandwidth..
Radar Receiver / Detector Type : Superheterodyne, Varactor-Tuned VCO,Scanning Frequency Discriminator,Digital Signal Processing (DSP).
Laser Detection : Quantum Limited Video Receiver,Multiple Laser Sensor Diodes.
Enhanced Radar Protection:Our enhanced "V-Tuned" radar receiver provides extreme long range warning on all radar: conventional and "instant-on" including POP mode, X-band, K-band, and SuperWide Ka-band. Digital Signal Processing (DSP) provides maximum range, with minimum false alarms.
Exclusive AutoSensitivity Mode:ESCORT's patented AutoSensitivity mode intelligently identifies real threats from other radar sources. Plus, our exclusive Traffic Signal Rejection (TSR) software rejects interstate traffic sensors making it quiet to own and operate.
High-Performance Laser Protection:PASSPORT's multiple high-performance laser sensors provide maximum laser warning, with superior off-axis protection. For the ultimate in laser protection add the optional ZR4 Laser Shifter.

SECURE # Rolling code key fob device offers better security and far more code combinations (more than 18 quintillion – 18 x 10^18 possibilities, nearly a trillion more than typical fixed code or so-called learning code ones) and built on new platform using higher RF sensitivity -111dBm superheterodyne module for better long range and more stable performance. Also 433Mhz frequency is less crowded than 315Mhz in USA..
EASY & FLEXIBLE # Two independent relay channels can either work together (in latching) for polarity reversing or individually (in pulse / hold) to control different electronics, such as one channel for garage door controller unit, the other for entry lights. Easy programming & easy to use DIP switches working mode selection between pulse / momentary, hold / toggle and latching mode..
ENCLOSURE # Designed to work both indoor and outdoor, default enclosure supplied protects the inner radio receiver circuit board safe from rain or other tough weather, while customer can also use chemical glue or epoxy adhesive to seal the wiring holes after setup, providing IP55 equivalent waterproof protection level. Mounting holes are provided for easy installation to walls etc using screws..
INTERFACE # 3-Level efficient switching po....