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YAESU DR-1 144/430 Dual Band Digital Repeater for Norfolk Island AGM

Date : 14 / 05 / 2016
Author : Fred Swainston - VK3DAC

The repeater has been under test at the Yarra Glen club rooms is a Yaesu DR-1. It has been set to the YVARG, VK3RYV frequencies of input 434.300MHz and output at 439.300MHz. The unit is very easy to program although like all digital equipment is has multiple menus to work through.
The test is a temporary installation and will be removed and relocated to Norfolk Island.

The location at the club rooms is not particularly good for UHF however reasonable coverage has been achieved. With contacts with VK3WHO, VK3WAR, VK3CNW, VK3DAC and VK3TSR. The output power has been set to 50 watts. Currently the repeater has no external control or internet connection. The unit is running on a 13.8v switch mode power supply and the diplexer has been tuned for the repeater frequencies. The antenna is the clubs multiband vertical mounted on top of the club room roof.

The Yaesu DR-1 is a digital/conventional FM dual mode repeater that covers the VHF and UHF amateur radio bands. It was developed for use with the Fusion System. The DR-1 will provide continued use of conventional FM communication while integrating the use of digital communication functions through the repeaters Automatic Mode Select (AMS) capability.

The repeater controller, receiver and transmitter are all packaged into a 19” standard cabinet rack mount panel unit for simple replacement of an existing repeater. Existing peripheral devices such as the diplexer and amplifier, etc., are used as they currently would be on and existing repeater installation. Modulation Modes are Conventional FM, 12.5 kHz, Continuous Four Level Frequency Modulation (C4FM) Digital, Voice/Data (V/D Mode), VFR Mode, Digital/FM conventional mode (DFR Mode). AMS (Automatic Mode Select) function automatically recognizes the signal as C4FM digital or conventional FM, and then the DR-1 repeater retransmits the signal using the preset communications mode.


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