buat duplexer repeater vhf sendiri

Cable the duplexer for operation, that is, cable all of the cavities, two (or three) on the receiver and two (or three) on the transmitter. Connect the duplexer to the radio. Connect your signal sampler between the output of the duplexer and the load. Set the signal sampler's attenuation to minimum, open the receiver's squelch, and tune up the The WP-639 duplexer consists of four 5-inch cans. It covers the 2M band and can do 600 kHz spacing minimum if it was ordered that way. The WP-641 duplexer consists of four 8-inch cans. It covers the 2M band and can do 500 kHz spacing minimum if it was ordered that way. Of the two, the WP-641 has slightly better specs.676 repeaters found in Texas. = On-Air = Off-Air = Testing/Reduced = Unknown Click on the frequency for additional details. Click on a header to sort. Note: Sorting does not carry through to exports! Access Location County Call Use Modes; 144.9980 x: Bellaire: Harris: W5LIC: OPEN: AllStar EchoLink : 145.0700 x: Amarillo: Potter:.

This article will explain all the components of a repeater system. With an emphasis on duplexers and why a person would get one. Parts of a repeater system. A repeater systems contains 5 core parts. They are the power supply, Repeater, duplexer (optional), feed line, and a antenna (s). We will breakdown all of the parts in the next few paragraphs.BCD-150150 VHF Duplexer. VHF Duplexers. Great for Amateur and Commercial Applications. If you need assistance, call us at 816-532-8451 and we can help specify the correct duplexer for your specific application. If you need 220 MHz / 1.25m duplexers, click HERE..

The drawing above shows a idea of the cavity for 430.7125MHz. Total length is 300mm, diameter 6 inches (152mm OD), the centre resonator diameter is a copper OD 42mm and 150mm long. Without the extra tuning rod added to the end plate the cavity with 150mm long centre resonator tuned to 435.7MHz.Feb 8, 2022. #9. If the duplexer is meeting specs it would work ok at its specified minimum 5.7MHz split. If you go a little less on the split like 5.0MHz the specs will go out the window very fast and at it will not work at all with a 2.5MHz split. gdelacruz said: using MTECH MCD-150 (mobile flat pack at 5.7MHz) S.Chapter 1 - The Mysterious Duplexer. The cavity duplexer is a very familiar part of both amateur and commercial two-way radio. On a typical two-way hilltop, cavity duplexers are as common as the forest of antennas that bristle from the towers. Most repeaters have one..

The W1GAN duplexer nearing completion after refurbishment showing 19" rack-mount frame and lugs Performance The set-up in this case was for a 2m repeater with a transmit frequency of 147.275MHz and a receive frequency of 147.875MHz. It is important to note that there was nothing wrong with the duplexer before it was refurbished.for the Bridgecom repeater and 87.43 for the 146.04/64 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. Adjacent-Channel Rejection Ratio (ACRR)Sep 10, 2016. #3. I think a minimum goal for a low power repeater would be at least 60dB isolation. You also have to consider the coax leakage. 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..

New HAM radio repeator in town, how to prepare the equipment including the duplexer for set upbahan2 yang diperlukan hanya beberapa komponen simple saja, tidak perlu membongkar radio untuk membuat repeater menggunakan DJ196 ini. silahkan perhatikan gambar dibawah ini : terlihat simple kan, komponen yang dibutuhkan yaitu : jack 2,5 stereo x 2. jack 3,5 mono x 1. transistor BC547 x 1. dioda 1n4148 x 2. resistor 1K x 2. elko 10uF / 16v x 2..

Find the deal you deserve on eBay. Discover discounts from sellers across the globe. No matter what you love, you'll find it here. Search Duplexer repeater and more.A Typical HF-VHF/UHF Duplexer. Copied from Wikipedia and modified to suit this site. A duplexer is a device that allows bi-directional communication over a single channel, and in ham radio is typically used in repeaters In radar and radio communications systems, it isolates the receiver from the transmitter while permitting them to share a Output Frequency 146.880 Mhz. Our main VHF repeater, known locally as the "Eight-Eight Machine", is located atop a tall building near SMU and downtown Dallas. It transmits an effective radiated power of 70 watts. The input frequency for this repeater is 146.280 Mhz. (negative offset) and CTCSS or PL tone of 110.9 is required for access..

Get a UHF or VHF Duplexer for your repeater to eliminate the need for two antennas. Every Duplexer purchased from Two Way Direct comes with Free Tuning. ContTXRX 2m (VHF) 400W Duplexer. 2 reviews. All high RF-current components silver-plated for highest performance. Vari-Notch® design provides low loss and high isolation in a compact package. 144-174 MHz Frequency Range. 0.5 MHz Minimum Freq Separation. Power Rating 400 W. 85 dB Isolation.The Texas VHF-FM Society is a non-profit organization tasked with frequency coordination and establishing standards for repeaters throughout the state of Texas. Texas VHF-FM Society. Membership; Repeater. Search; Renewal; Coordination Texas VHF-FM Society P.O. Box 82666 Austin, TX 78708-2666. News A General Meeting and Election was held .

Most radio systems today use repeaters located on top of buildings, towers or on hill tops. These repeaters use two frequencies in a duplex fashion to extend the range of the radio system and make signals much stronger. In most cases, a duplexer is used as part of the repeater station. The duplexers at repeaters may serve several objectives:Aug 21, 2012. #4. Simplest answer is that a duplexer is needed when you plan to use the same antenna for simultaneous transmitting and receiving. If you can use two antennas and separate them vertically or horizontally far enough, you don't need a duplexer. Shockwave, think about that again!88 REPEATERS FOUND IN DALLAS COUNTY = On-Air = Off-Air = Testing/Reduced = Unknown Click on the frequency for additional details. Click on a header to sort. Note: Sorting does not carry through to exports! Frequency Offset Tone Up / Down Location County Call Use Modes; 29.6600-.1 MHz: CSQ / 192.8 : Richardson, Palisades: Dallas:.