Reviews Radio Frequency Relay

BTECH Mini UV-25X4 25 Watt Tri-Band Base, Mobile Radio: VHF, 1.25M, UHF Amateur (Ham)

  • What Makes the UV-25X4 Unique: Dual Synchronize Display Mode, Mic Audio Gain Settings, In depth user's guide, Auto Power Off Function, Channel Mode Editing Settings, Auto Scan, Scanning Resume, and Variable Frequency Scanning, Quad Watch Delay Time, Randomization Privacy Mode, Builds upon previous generation UV-2501+220.
  • Frequency Range: 144-148MHz (VHF), 222-225MHz (1.25M), 420-450MHz (UHF).
  • Broad (Wide) / Narrowband (Narrow) Selectable.
  • Recommended Accessories: Pair UV-25X4 with the Nagoya TB-320A Antenna (and RB-50 Magnetic Mount) for easy installation. The PC04 FTDI Cable is recommended for easy computer programming.
  • Dual Watch monitoring VHF/UHF and 220Mhz: The 220 MHz band antenna lowpass filter is switched with a relay and the 2 meter lowpass filter and 70 cm highpass filters are switched with PIN diodes - resulting in a audible relay switch noise when monitoring 220MHz with VHF/UHF simultaneously. A relay that completely isolated the 220 MHz RF filter won't impact the RF performance of the 2 meter/70 cm bands. If monitoring multiple 220MHz or VHF/UHF simultaneously the relay is not heard or used..
  • Tribander Mobile Radio Kit Includes: BTECH UV-25X4, Speaker Mic, 6 foot DC Cable with Cigarette Plug Connector, Ra....
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Retevis RT97 Professional Radio Relay Station,Full Duplex Customizable Base Station,16CH Solid Analog Radio Relay for Family Use(1 Pack)

  • Small and compact design of retevis mobile radio relay is easy to carry to increase the transmission distance of walkie talkie.
  • solid and dust proof radios repeater for longer use life without wasting your money.
  • High power mobile radio relay with the matching power adapter can work under DC 12V 24V power or car power.
  • mobile base station can be operated flexibly as fixed or mobile.
  • The built-in duplexer can receive and transmit signals at the same time.
  • you just need to match one antenna to transfer the signal of the walkie talkies.
  • this package does not include an antenna.
  • The frequency and offset can be customized according to your needs.
  • it can be used both for camping outdoor use and for establishing signal base stations in remote areas.
  • Mobile radios transceiver with LCD screen support selecting functions icons display including channel information.
  • Frequency for greater penetration and wide transmission range.
  • ensure long distance and smooth communication between the two way radio.
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Mirkit x Baofeng Radio UV-5R MK3X 5 Watt FCC Approved 2022 2100 mAh Li-ion Battery, Tri-Band Radio Mirkit Edition and Neck Strap Lanyard Mirkit Ham Radio Operator

  • What Makes the UV-25X4 Unique: Dual Synchronize Display Mode, Mic Audio Gain Settings, In depth user's guide, Auto Power Off Function, Channel Mode Editing Settings, Auto Scan, Scanning Resume, and Variable Frequency Scanning, Quad Watch Delay Time, Randomization Privacy Mode, Builds upon previous generation UV-2501+220.
  • Frequency Range: 144-148MHz (VHF), 222-225MHz (1.25M), 420-450MHz (UHF).
  • Broad (Wide) / Narrowband (Narrow) Selectable.
  • Recommended Accessories: Pair UV-25X4 with the Nagoya TB-320A Antenna (and RB-50 Magnetic Mount) for easy installation. The PC04 FTDI Cable is recommended for easy computer programming.
  • Dual Watch monitoring VHF/UHF and 220Mhz: The 220 MHz band antenna lowpass filter is switched with a relay and the 2 meter lowpass filter and 70 cm highpass filters are switched with PIN diodes - resulting in a audible relay switch noise when monitoring 220MHz with VHF/UHF simultaneously. A relay that completely isolated the 220 MHz RF filter won't impact the RF performance of the 2 meter/70 cm bands. If monitoring multiple 220MHz or VHF/UHF simultaneously the relay is not heard or used..
  • Tribander Mobile Radio Kit Includes: BTECH UV-25X4, Speaker Mic, 6 foot DC Cable with Cigarette Plug Connector, Ra....
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Retevis RT97 GMRS Mobile Base Station,Full Duplex Portable Radio Relay Station with LCD Screen,High Power Mini Compact Base Station for Camping(1 Pack)

  • The radio relay is GMRS frequency, please tell us before if you need customized frequency version.
  • The RT97 GMRS portable radio is easy to carry and support multiple power options.
  • wide signal coverage and strong penetration.
  • mobile base station can be operated flexibly as fixed or mobile.
  • The built-in duplexer can receive and transmit signals at the same time.
  • you just need to match one antenna to transfer the signal of the walkie talkies.
  • this package does not include an antenna.
  • 8 of them are default GMRS channels that have been set.
  • Radio repeater power divider with LCD screen supports icon display of selected functions.
  • The compact and rugged radio repeater is drop-resistant and not easily damaged.
  • has a longer service life and has high reliability and low power consumption.
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The ARRL Antenna Book: The Ultimate Reference for Amateur Radio Antennas, Transmission Lines And Propagation (Arrl Antenna Book)

  • 976 Pages - 05/01/2007 (Publication Date) - Amer Radio Relay League (Publisher).
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MUSYSIC Professional 2 Channel 7000 Watts DJ PA Power Amplifier Signal out MU-P7K

  • Stereo Output Power: "2x4000W PEAK, 2x2000W Program, 2x1000W RMS @2Ω" "2x2000W PEAK, 2x1000W Program, 2x500W RMS @4Ω" "2x1000W PEAK, 2x500W Program, 2x250W RMS @8Ω".
  • Bridge Output Power: "4000W PEAK, 2000W Program, 1000W RMS @4Ω" "2000W PEAK, 1000W Program, 500W RMS @8Ω".
  • Frequency Response: 20Hz-20KHz,+0,-1dB at watts / THD+N(20Hz-20KHz) : ＜0.23％20Hz-20KHz / Siew Rate ＞30V/us / Damping Factor ＞150 / Output Circuitry: Class AB / Signai to Noise Ratio ≥96dB / Cross Talk ＞80dB / lnput Sensitivity(8Ω) 1V /.
  • Connectors: Input: XLR input, 1/4" input: XLR Output: Speakon connector Output: Speakon, locking type socket, Banana plug connection output.
  • Dual cooling fans / Controls Panel: the power switch, channel 1 and channel 2 channel gain control.
  • After the board: working mode, pressure limit. / lndicators Panel: the power switch, channel 1 and channel 2 channel gain control.
  • After the board: working mode, pressure limit. / Amplifier Protection With short circuit, overload, overheat, cut peak pressure limit, dc, soft start, relay zero current switch, super audio and radio frequency protection device..
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Tecsun Radio PL-380 DSP Fm Am Stereo World Band Receiver,Small Size Radio

  • It receives FM stereo, AM, long wave, short wave (2.3 - 21.95MHz) radio program, practical multi-function, easy to operate..
  • FM receiver wide frequency range (64 - 108MHz), containing part of the campus radio and 2 - 5 channel TV Sound programs.
  • 7 kinds of method of selection sets: easy tuning (ETM), manually search for radio frequency (VF), manually search for the stored stations (VM), direct inputNumber or frequency of the radio address directly into pre-existing numbers, visit the radio frequency automatic search, automatic search browse stored station.
  • It can be manual, semi-automatic, fully automatic (ATS) store up to 550 radio frequencies: FM / MW / LW station 100 each can be saved, short-wave can be saved..
  • Multi-function display: can display the radio frequency, signal strength / noise ratio, temperature, battery power, and more..
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MUSYSIC Professional 2 Channel 9000 Watts DJ PA Power Amplifier Signal out MU-P9K

  • Stereo Output Power: "2x5600W PEAK, 2x2800W Program, 2x1400W RMS @ 2Ω" "2x2800W PEAK, 2x1400W Program, 2x700W RMS @ 4Ω" "2x1400W PEAK, 2x700W Program, 2x350W RMS @ 8Ω".
  • Bridge Output Power: "5600W PEAK, 2800W Program, 1400W RMS @ 4Ω" "2800W PEAK, 1400W Program, 700W RMS @ 8Ω".
  • Frequency Response: 20Hz-20KHz,+0,-1dB at watts / THD+N(20Hz-20KHz) ＜0.23％20Hz-20KHz / Siew Rate ＞30V/us / Damping Factor ＞150 / Output Circuitry Class AB / Signai to Noise Ratio ≥96dB / Cross Talk ＞80dB / lnput Sensitivity(8Ω) 1V / input lmpedance 20 k Ω baiance / 10 k Ω unbalanced unbalance balancing 20 k / 20 k /.
  • Dual cooling fans / Connectors Input: XLR input, 1/4" input: XLR Output: Speakon connector Output: Speakon, locking type socket, Banana plug connection output.
  • Controls Panel: the power switch, channel 1 and channel 2 channel gain control.
  • After the board: working mode, pressure limit./ lndicators Panel: the power switch, channel 1 and channel 2 channel gain control.
  • After the board: working mode, pressure limit./ Amplifier Protection With short circuit, overload, overheat, cut peak pressure limit, dc, soft start, relay zero current switch, super audio and radio frequency protection device..
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Tecsun PL-310 fm/am Stereo World Band Dsp Receiver

  • There are 6 sets mode selection:manual search radio frequency, direct input frequency numbers, manually search for the stored radio stations or directly onto a pre-existing address numbers, visit the radio frequency automatic search, automatic search browse stored station..
  • Multi-function display:can display the radio frequency, signal strength / noise ratio, temperature, battery power and so on..
  • AM IF bandwidth can be set to (1 ~ 6kHz)..
  • use of high-quality paper cone speakers, sound quality soft Naiting..
  • Health as Germany comes with a special high-quality DSP radios E402 headphones, you can enjoy to enjoy the highest quality FM stereo radio.
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Amon Tech Heavy Duty Car Radio 2 Way AM/FM Radio with MP3 Player forExcavator Tractor Truck Kart Grab Crane Boat Yacht Loader Grader Earth Moving Machine

  • Advanced Durable Machine: Heavy duty radio material provide a strong and durable radio, also it is a standard din size with small body, very fashion outlook.
  • Worldwide Frequency: Just need to press some buttons to choose different countries' frequency for shipment(fixed frequency). User can select Europe FM frequency or USA FM frequency through software, frequency also can be fixed.
  • Universal Compatible: Excavator radio suitable for excavator, tractor, truck, kart, loader, grader, earth moving machine, convenient and easy to carry, your best partner on your vehicle.
  • Waterproof and dust-proof front panel : Waterproof test : JIS DO203RI standard, dust-proof test : JIS DO207FI standard, our product is in high standard quality, guarantee you it’s the best and professional radio.
  • Dielectric Strength Test: Anti-seismic grade 13 in Japan JISD 1601 grades. AM/FM Radio is very stable installed onto your vehicle. 12V/24V automatically interchangeable by radio.
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MUSYSIC MU-D16K Professional 2-Channel 2x8000 Watts D-Class 1.5U Power Amplifier

  • Stereo Output Power: "2x8000W PEAK, 2x4000W Program, 2x2000W RMS @ 2Ω" "2x4000W PEAK, 2x2000W Program, 2x1000W RMS @ 4Ω" "2x2000W PEAK, 2x1000W Program, 2x500W RMS @ 8Ω" / Bridge Output Power: "8000W PEAK, 4000W Program, 2000W RMS @ 4Ω" "4000W PEAK, 2000W Program, 1000W RMS @ 8Ω".
  • Frequency Response: 20Hz-20KHz,+0,-1dB at watts / THD+N(20Hz-20KHz) ＜0.23％20Hz-20KHz / Siew Rate ＞30V/us / Damping Factor ＞150 / Output Circuitry Class AB / Signai to Noise Ratio ≥96dB / Cross Talk ＞80dB / lnput Sensitivity(8Ω) 1V / input lmpedance 20 k Ω baiance / 10 k Ω unbalanced unbalance balancing 20 k / 20 k /.
  • Three cooling fans / Connectors Input: XLR input, 1/4" input: Speakon connector Output: Speakon, locking type socket, Power Requirements: 90v-250v 50Hz.
  • Controls Panel: the power switch, channel 1 and channel 2 channel gain control.
  • After the board: working mode, pressure limit./ lndicators Panel: the power switch, channel 1 and channel 2 channel gain control.
  • After the board: working mode, pressure limit./ Amplifier Protection With short circuit, overload, overheat, cut peak pressure limit, dc, soft start, relay zero current switch, super audio and radio frequency protection device..
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MUSYSIC MU-D9600 Professional 4-Channels 2x9600 Watts D-Class 1U Power Amplifier

  • Stereo Output Power: "4x4800W PEAK, 4x2400W Program, 4x1200W RMS @ 2Ω" "4x2400W PEAK, 4x1200W Program, 4x600W RMS @ 4Ω" "4x1200W PEAK, 4x600W Program, 4x300W RMS @ 8Ω" / Bridge Output Power: "2x4800W PEAK, 2x2400W Program, 2x1200W RMS @ 4Ω" "2x2400W PEAK, 2x1200W Program, 2x600W RMS @ 8Ω".
  • Frequency Response: 20Hz-20KHz,+0,-1dB at watts / THD+N(20Hz-20KHz) ＜0.23％20Hz-20KHz / Siew Rate ＞30V/us / Damping Factor ＞150 / Output Circuitry Class AB / Signai to Noise Ratio ≥96dB / Cross Talk ＞80dB / lnput Sensitivity(8Ω) 1V / input lmpedance 20 k Ω baiance / 10 k Ω unbalanced unbalance balancing 20 k / 20 k /.
  • Three cooling fans / Connectors Input: XLR input, 1/4" input: Speakon connector Output: Speakon, locking type socket, Power Requirements: 115v-230v 50/60 hz.
  • Controls Panel: the power switch, channel 1 and channel 2 channel gain control.
  • After the board: working mode, pressure limit./ lndicators Panel: the power switch, channel 1 and channel 2 channel gain control.
  • After the board: working mode, pressure limit./ Amplifier Protection With short circuit, overload, overheat, cut peak pressure limit, dc, soft start, relay zero current switch, super audio and radio frequency protection device..
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AD8317 1M-10GHz 60dB RF Power Meter Logarithmic RF Signal Power Detector Controller for Amplifier

  • EASY TO USE :The logarithmic power meter adopts AD8317 chip design, which is convenient to use, small in size, high in efficiency, easy to install, stable and reliable, and is used for radio frequency signal power detection..
  • DETECTABLE :The logarithmic power meter has strict quality control and quality assurance. It can detect the power of the radio frequency signal from -55dBm to 0dBm, and convert the radio frequency signal into a DC voltage output..
  • DYNAMIC RANGE :The greater the amplitude or power of the radio frequency signal, the higher the output voltage, and the output voltage is proportional to the logarithm of the input signal amplitude, thereby expanding the dynamic range of the detection signal to 55dB..
  • WIDELY USED :The logarithmic power meter adopts advanced technology and exquisite craftsmanship, and has been improved to improve durability. Logarithmic detector can be widely used in radio frequency signal detection, signal power measurement, and environmental field strength detection..
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