Software 2 meter duplexer

You can also maintain full control over who accesses what so you can comply with licensing restrictions. Connect swr meter between 0 52 mhz plug and tx 51 mc carrier low power. Physically a cavity filter is a resonator inside a conducting box with coupling loops at the input and output, as follows. Software should follow students wherever and whenever they need it. The duplexer is a device which prevents the repeaters highpower transmitter. Or use two dual band antennas with a dual band transceiver with only one rf output. Multiple signaling systems are equipped as standard. The main category is duplexers and diplexers that is about duplexer and diplexer.

When i asked an amateur radio buddy how he tuned his repeater duplexer, he responded, by signal strength. Sep 06, 2017 when i asked an amateur radio buddy how he tuned his repeater duplexer, he responded, by signal strength. She will show you the store and introduce some of the staff in this short video. About a two meter duplexer the resource is currently listed in dxzone. The controls of the duplexer are accessible from the front of the. The boom is 34 square with rounded corners and 37 1 2 long. Below the shelf you can see the duplexer black laying horizontal. About homemade duplexer for 2 meter repeaters the resource is currently listed in in a single category. Six meter heliax duplexers lowband vhf heliax duplexer performance on 6 meters, notch style shown above is a graphic displaying the performance of a 3rd generation, 1 mhz split, 90 db isolation, 1 db insertion loss, 6 stub six meter heliax duplexer using notch technology operating on a 52 mhz in 53 mhz out frequency pair.

Use your own potentionmeter to set the voltage levels. Cavity filters are the basic circuitry behind a duplexer and are sharply tuned resonant circuit that allow only certain frequencies to pass. A typical device provides 60db of rejection betwen the 2meter and 70cm ports and this is. This auction is for 1 4cavity vhf 2 meter ham duplexer. One big problem we re going to need to overcome is the duplexer on the antenna. A pair of 6 meter duplexers are large usually six 6 feet tall and heavey over 200 lbs. The use of a 2m70cm antenna duplexer to clear up a modej desense problem has been employed by many satellite operators and it works. These systems are fully compatible with icom fseries radios. The mfj916b duplexer is a series of inductance coils and capacitors that act as a bandpass filter. The whiskered and sinister looking individual behind ramon is none other than kenny, kl1yj. Apr 15, 2012 as much as i would love to travel to dayton in may to look for a 6 meter duplexer, time and money constraints just dont allow it this year. Tuning a commercial uhf duplexer with rigexpert antenna analyser the club is assembling a 70 cm repeater with some equipment kindly loaned to us to use. In the case of an ht working ao27 the duplexer separates the signals for the 70 centimeter downlink and the 2 meter uplink.

Find 2 meter duplexer related suppliers, manufacturers, products and specifications on globalspec a trusted source of 2 meter duplexer information. This means you will be able to use existing two way radios integrated in with new digital radios on the same system. Heavy duty diecast enclosure houses low pass networks that separatecombine 144440 mhz signals. The boom is 34 square with rounded corners and 37 12 long. A simple desense filter for modej satellites amsat. Some people may call this a diplexer but it performs the same function as a duplexer. Generically, filter of this kind are known as notch filters. Home duplexer notch filter tuning worldwidedx radio forum. This link is listed in our web site directory since thursday jul 10 2008, and till today build a 2 meter duplexer has been followed for a total of 7894 times. The repeater has an internal space to install a duplexer and isolator. You can rest easy knowing your amateur repeater duties are being handled by a bcr repeater.

Use an hf, 2 meter or 440 mhz antenna with a separate hf, 2 meter or 440 mhz transceiver without a builtin duplexer. An amateur radio repeater is an electronic device that receives a weak or low level amateur. Up for auction is a never placed into service sinclair q202g duplexer that was standby for public safety. Nov 09, 2009 i have a 2 meter wide split repeater for portable use only. About a two meter duplexer the resource is currently listed in in a single category. The larger cavities in a base station duplexer provide greater power handling capability and increased selectivity for greater txrx isolation.

The insertion loss transmitter to antenna is better than 2 db and the. Because this an amateur radio 2 meter repeater, i assume that you are using the standard 600 khz frequency split. Some of these used things like garbage cans, sewer pipe, paint cans, and even soup cans. Reliable, versatile, and plenty of rf power to get the job done. This link is listed in our web site directory since saturday may 8 2010, and till today a two meter duplexer has been followed for a total of 3624 times. The third filter was made 4112 inches long to lower its effective frequency range, thus requiring a bit less capacitance to bring the notch where we want it. Even when the antennas are close together and 100 watts or more are applied to the 2 meter antenna, the 60db of rejection provided by the duplexer should clear up any desense problem. Join katie wy7yl on her tour of one of our ham radio outlet flagship superstores in beautiful plano, texas. Duplexer and diplexer category is a curation of 20 web resources on, diplexer for 2m and 70 cm, homebrew cavity resonator duplexer for 2m repeater, aa5tb antenna coupler swr bridge.

Hf2m70cm duplexer the mfj916b duplexer is a series of inductance coils and capacitors that acts as a bandpass filter. The third filter was made 411 2 inches long to lower its effective frequency range, thus requiring a bit less capacitance to bring the notch where we want it. This page provides links to manuals and hard to find documents and information which we thought wed share in hopes of helping other folks have an easier time finding information thats so obscure, esoteric, or just plain impossible to find on the web. Manuals and hard to find documents duplexer repair. One side should be at zero volts and the middle is the wiper. Using even a mobile duplexerassuming an at home repeater in an. Arrow ii dualband handheld yagi, 3 element beam on 2 meter, 7 element beam on 70 cm 146bp. The gray duplexer cans are visible in the bottom of the rack. The frequencies should ideally be software programmable. The bcr repeater provides a feature rich repeaterbase station.

Aug 16, 2008 over the years there have been quite a few articles about building duplexers. Over the years there have been quite a few articles about building duplexers. The icom cy5000d is an easy to setup and use 50 watt idas vhf repeater. Download32 is source for 2 meter repeaters shareware, freeware download ham radio repeaters in uk for handbase, repeaters bg for ipad, igluco diabetes management software, repeaters bg, stuff o meter, etc. I would reduce the power to less than 10 watts and put. Homebrew cavity resonatorduplexer for 2m repeater there has been some interest in the club establishing another 2m repeater, but lacked a duplexer. The high frequency section of a duplexer is designed to be tuned to the higher frequency whether that happens to be either the transmit frequency or the receive frequency. Vhf duplexer sinclair q202gc 2 without cabinet 148174 mhz great for two meter ham band or commercial radio use i have for auction this two meter duplexer that is in great condition. The uk leading supplier and distributor of communications equipment. Discussion in general technical questions and answers started by. Please note that this item will be shipped directly from arrow antennas.

Amateur 2meter repeaters have a separation of only 0. Feb, 20 better place to get audio is the high side of the volume control unless you like poking around the radio with an oscope. Even when the antennas are close together and 100 watts or more are applied to the 2meter antenna, the 60db of rejection provided by the duplexer should clear up any desense problem. The duplexer combines the output of the hfvhf transceiver and the output of the uhf transceiver so that both. Duplexers, buy new and used products from ham radio.

Basically, the 2 uhf radios would go to the duplexer and then the antenna feed from that goes to the uhf side of the diplexer, where it combines with the vhf feed. Connect swr meter between 2 m plug and tx on 2 m 145 mc carrier low power. Repeaters are found mainly in the vhf 6 meter 5054 mhz, 2 meter. Output power is 10 watts and is currently set up to transmit on 145. About 144432mhz homebrew antenna diplexers the resource is currently listed in in a single category. If no 6m tx available adddjust on 10m band adjust c7 and c8 to obtain swr 1. Uhf antenna spacing on a repeater without a duplexor. The duplexer combines the output of the hfvhf transceiver and the output of the uhf transceiver so that both transceivers can be connected to the same antenna. I wonder if i could run the duplexer and diplexer in series so it would be unnecessary to reconfigure the antenna cabling. Tuning a commercial uhf duplexer with rigexpert antenna.

This link is listed in our web site directory since sunday aug 5 2012, and till today 144432mhz homebrew antenna diplexers has been followed for a total of 1004 times. If you need assistance, call us at 8165328451 and we can help specify the correct duplexer for your specific application. This link is listed in our web site directory since sunday may 17 2009, and till today homemade duplexer for 2 meter repeaters has been followed for a total of 3795 times. Better place to get audio is the high side of the volume control unless you like poking around the radio with an oscope.

Austin duplexer2m440 duplexers tri quad, duplexer2m440. I have a 2 meter wide split repeater for portable use only. Fumei different frequency combiner dx72 repeater duplexer hfvhf 1. Radio mobile coverage prediction software by roger coude ve2dbe a bit of a learning curve, but darn good stuff. This is the model with the internal duplexer and comes with cables to connect to a radio with a bnc connector. Please limit output power to no more than 10 watts when using the duplexer. Of course that is if you dont have a signal analyzer with tracking generator. Homemade duplexer for 2 meter repeaters resource detail. We were able to tune these very quickly and easily using the new chinese kc901h network analyser more about that in another post. Appsanywhere gives higher ed it a way to deliver apps to any device across campus and many off campus, too ondemand. The main purpose of a duplexer is to separate the transmit and receive signals.

Duplexer for portable vhf repeater electrical engineering stack. Analisys, implementation, and testing gheorghe sauciuc tehnical university gheorghe asachi of iasi faculty of electronics, telecommunication and information tehnology, bd. The second filter seemed to be just a bit shorter than we needed it to be. Depending on the type of feed, a 70 centimeter antenna can look like and open or short at 2 meters. High rfcurrent components silverplated varinotch design low loss and high isolation compact 144174 mhz pair with a bridgecom bcr50v repeater. Full duplex radio claimed easier with analog module. The old freezer compartment is below that, on a drawer and we plan to put batteries and standby power in there. As with the first two sections, we had to retune the entire string when we added the third section. Two highgain antennas, two runs of 12 hard line along with the needed. It is a close spacing500khz duplexer that will handle up to 350 watts. The best way for higher ed to deliver and virtualize software. Thanks to the excellent work of wb5wpa, it is possible to create a useable duplexer capable of handling a high power 500khz split six meter repeater at the time of this writing, i have built three such duplexers and they do indeed work as advertised. Here is a photo of the inside of a highlow pass mobile duplexer i built many years ago. About build a 2 meter duplexer the resource is currently listed in in a single category.