Icom FR5000 01 UR KIT. May 28, 2012 #3 flatulent Advanced Member level 5 Joined Maxon SR-170V 5 Watt VHF (142 - 174 MHz) Repeater without Duplexer. The signals on inputs 1 and 2 occupy different frequency bands. Maxon SR-170U 5 Watt UHF (450 - 490 MHz) Repeater without Duplexer. Maxon ER-9000 50 Watt VHF Digital / Analog Repeater. The antenna transfers the signals it receives to the receiver, turning it into an audio signal. Home. Duplexer Tuning / Distance Without Duplexer. per page. Page: 1; 2; 3; 4-6.67%. In radio communications systems, it isolates the receiver from the transmitter while permitting them to share a common antenna. Most radio repeater systems include a duplexer. Be designed for operation in the frequency band used by the receiver and transmitter and must be capable of handling the output power of the transmitter. Standard Pricing Duplexer - Probably the least understood and sometimes forgotten component of a repeater system. Generally, a duplexers sentivity will reduce to about 0.35uV because of the duplexer. 927 MHz repeater panels: TR/RX & link radios, controller, LNA/preselector cavities, & fuse block. Generally a duplexer gives about 50dB isolation between TX and RX, so the antenna isolation (if the duplexer is not used), should be about the same, maybe more. Asked by WQUN760, August 29, 2014. If you need assistance, call us at 816-532-8451 and we can help specify the correct duplexer for your specific application. AMPHENOL PROCOM DPF 2/33-125 Icom CY6002 450-512 MHz UHF iDAS Analog/Digital Repeater. This is a Motorola GR1225 UHF repeater, model number M44GRC90C2AA. The units can be tuned for HAM band operation. The frequency of the repeater can be written according to the needs of the users frequency range within 400-470MHz transceiver. Product Overview. According to the book, at 146Mhz, 300' horizontal 33cm FM / P25. 2 yr. ago Waoo thank you very much. Maxon SR-170V 5 Watt VHF Repeater without Duplexer. The signals on inputs 1 and 2 occupy different frequency bands. Every 2.8db makes a difference of 1 time power output. Great for Amateur and Commercial Applications. It is also known as a cross band combiner. A Ham radio repeater typically comprises an antenna that transmits and receives signals, a transmitter and a receiver, a duplexer, a feedline, and a controller. There are two main types of duplexers: Band pass and band reject. Log In Sign Up. BridgeCom BCR-540X 40 Watt Crossband Repeater. The maximum isolation for a 4 cavity duplexer is about 90 dB and a 6 cavity duplexers can provide more than 100 dB, so the Bridgecom repeater would require a 6 cavity duplexer. While this repeater is 0.16uV which is without the duplexer. Items 1 to 15 of 53 total . VHF Duplexers. Consequently, the signals on inputs 1 and 2 can coexist on the output without interfering with each other. Note that there must be If you need 220 MHz / 1.25m duplexers, click HERE. A duplexer is a filter system that keeps the transmit and receive sides separate. BridgeCom 50 Watt VHF (136 - 174 MHz) Repeater without Duplexer. Show. Amazon.com: UHF Duplexer Repeater, 50W 6 Cavity UHF Portable Duplexer with Multiple Stop band Filter tool (TX: 456.175 RX: 466.175) : Everything Else Environmentally friendly and safe, without any harmful substances, and you can use with confidence. r/amateurradio. 16. antenna spacing repeater. Every Duplexer purchased from Two Way Direct comes with Free Tuning. BridgeCom BCR-540X 40 Watt Crossband Repeater - U/V, V/U, One Way. Every 2.8db makes a difference of 1 time power output. $684.00. If you have the receive coax going up the mast past the transmit antenna, some regular braided coax can have less than 40dB of shielding at UHF. Consequently, the signals on inputs 1 and 2 can coexist on the output without interfering with each other. Maxon SR-170U 5 Watt UHF Repeater without Duplexer. Duplexer Tuning / Distance Without Duplexer. a better alternative (at least from a $$$ standpoint) will be physical separation of the Rx/Tx antennas. Generally, a duplexers sentivity will reduce to about 0.35uV because of the duplexer. Unlike a typical FM repeater which has input and output on the same band, a cross-band repeater typically has one transceiver on a VHF frequency and one transceiver on a UHF frequency. Maxon SR-170V 5 Watt VHF Repeater without Duplexer. Features: 50 Watt VHF Power Output 16 Channels Built-In 10A Power Supply Built In Channel ID Adjustable Power Front Panel Speaker The BridgeCom BCR Series Repeater provides a feature rich repeater platform to meet a variety of communications needs. I think a minimum goal for a low power repeater would be at least 60dB isolation. Press J to jump to the feed. Icom FR6000 KIT 400-470 MHz 2 Channel Analog/Digital Repeater. Get a UHF or VHF Duplexer for your repeater to eliminate the need for two antennas. You also have to consider the coax leakage. A diplexer is a passive device that combines two inputs into a common output. Would it be possible to make a digital "simplex" voice repeater which would listen on one time slot and immediately repeat the received voice frame on the next time slot, on the same frequency? Yes, the protocol could be used this way. This is important because transmitters are high power large signal devices, and receivers are extremely sensitive small signal devices. If you can use two antennas and separate them vertically or horizontally far enough, you don't need a duplexer. Amateur 2-meter repeaters have a separation of only 0.4 percent, or 600 kHz. Sometimes it will repeat and other times it will not. Maxon SR-170V 5 Watt VHF (142 - 174 MHz) Repeater without Duplexer Standard Pricing includes Radios and Repeater Cable. From experience, a repeater in ANALOG mode will work fine when using one antenna system for the receiver and one for the transmitter. Electrically a duplexer is a device using sharply tuned resonate circuits to isolate a transmitter from a receiver. Adjacent-Channel Rejection Ratio (ACRR) Found the internet! It must attenuate the transmitter carrier, this prevents receiver overloading, which in turn would reduce receiver sensitivity. Press question mark to learn the rest of the keyboard shortcuts. Without a duplexer the transmitter side would jam the receiver, and the repeater wouldn't work. Sort By. A decrease in frequency separation makes the job of providing good isolation even more difficult. User account menu. for the Bridgecom repeater and 87.43 for the 146.04/64 repeater. A diplexer is a passive device that combines two inputs into a common output. Most "mobile duplexers" are reject-only and are sometimes called flatpacks, notch-only, or notchplexers. Some are 3 transmit and 3 receive (6 cavity), some are 2+2, and I've seen 3+2 and 3+1 configurations. A note on small mobile duplexers from Eric Lemmon WB6FLY (SK): (editors note: Southern California uses low-in, out-high on the UHF repeaters) While this repeater is 0.16uV which is without the duplexer. A duplexer must meet some basic requirements. General Mobile Radio Service (GMRS) Technical Discussion. Icom FR6000 400-470 MHz IDAS Repeater. Package includes: Unit only. - 'Doc V vo1ks Active Member Feb 11, 2012 280 48 38 Nova Scotia, Canada Search within r/amateurradio. Standard Pricing Interior of 927 MHz repeater with duplexer, circulator, PA, powersupplies, and link cavity. It is also known as a cross band combiner. Another repeater-like option that works without a duplexer is a cross-band repeater. Repeater comes mounted in a GR1225 housing which provides continuous duty cycle (100%) and comes complete with internal duplexer and Base Mic. An RF Duplexer is an electronic device used in RF communications transceiver circuits to allow sharing of the same antenna. As: sensitivity, intermods, blocking, etc, factors that are influenced by the transmitter in a half or full duplex RF system. The frequency of the repeater can be written according to the needs of the users frequency range within 400-470MHz transceiver. In DIGITAL mode, however, the repeater will work erratically without a duplexer. Repeaters/Duplexers. This allows both of them to operate on the same antenna at the same time without the transmitter RF frying the receiver. What is the required separation between tx & rc antennas to operate a repeater without a duplexer? The transmit and receive radios I have used are Kenwood. Accessories RDR9000 UHF/VHF 40 Watt RCA DMR Repeater $2,599.99 I still have time to rectify. Shockwave, think about that again! Technical Discussion. Maxon SR-170U 5 Watt UHF (450 - 490 MHz) Repeater without Duplexer Standard Pricing includes Radios and Repeater Cable. Additional accessories sold separately. Using Heliax would address that. Vhf Murs Vhf 160 Ltr Conventional Vhf 32 Motorola Ct250 Motorola Syntor X9000 Vhf Duplexer 800Mhz Flashport Control Heads Vhf 16Ch Radio Dtmf Radio Macom M A-Com Radio 450-520Mhz Maratrac Radio 16 Channels Two Way Radio Mobile Ham Gmrs Dash Mount Mobile Two-Way Radio Motorola Visar Uhf Radio Palm Mhz Uhf 128 Motorola Cdm 1250 Radio Ham Gmrs Uhf 32 These are 40 watt, 16 channel repeaters with a band split of 444-474 Mhz. Simplest answer is that a duplexer is needed when you plan to use the same antenna for simultaneous transmitting and receiving. prcguy mmckenna said: The repeater does this receiving on one frequency and retransmitting on another frequency. This occurs simultaneously and is called duplex operation. The frequency separation between the TX (transmit) and the RX (receive) is sometimes referred to as the split or repeater pair of frequencies.
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repeater without duplexer