System Fusion is Yaesu’s implementation of Digital Amateur Radio, utilizing C4FM 4-level FSK Technology to transmit digital voice and data over the Amateur radio bands. In the early 2000’s GMSK emerged in the Amateur radio market as the dominant digital mode, however in 2013 Yaesu introduced “System Fusion” which quickly became the dominating digital format in Amateur radio because of quality, reliability and enhanced performance in a wide range of environments.

Digital Communication modes have gained popularity over the years in the market because of superior performance in environments with interference, noise and other contributing factors that degrade the quality of a standard FM Analog signal. Narrower bandwidth and the need for increased spectrum have led to the development of digital communications technology, which has been widely adopted in the Public safety and private business sectors that use two-way radio technology. Unlike it’s commercial counterpart, System Fusion is an Amateur Friendly Digital Operating mode, straying away from some of the design considerations that make commercial solutions less appealing and more difficult for Amateur Radio Operators, providing a simpler interface and features that meet the demands and needs of the Amateur enthusiast specifically. Below you will find more information on this marvelous new technology, and how it can meet every operators demand and needs for a clear and simple Digital Experience.

V/D (Digital Narrow) – Voice+Digital or “V/D” mode

Voice FR (VW) Mode – Utilizes all available bandwidth for high-fidelity voice operation, providing the most crystal clear of voice communications.

Highspeed Data

Transfer data such as images or text messages at full rate with speeds up to 9600 Bits-per-second

Analog FM Mode

Maintains backwards compatibility with existing Analog FM Equipment, allowing a wide range of users to experiment with System Fusion Digital.

Capabilities such as Automatic Mode Select (AMS) On the DR-1X Repeater allow an even wider range of users to communicate, by running the repeater in “Fixed FM” mode on Transmit, and “Automatic Mode Select” on receive the repeater will automatically detect the incoming signal and convert it to an Analog FM Transmission. This mode allows digital users to communicate with existing Analog FM users without the need to switch their radios into FM Mode, allowing crystal clear Digital reception into the repeater that is converted into a conventional FM Signal.


FTM 991A {older model FTM 991}: Base/Mobil

HF/6/2 and 70cm/100 watts on HF & 6, 50 on 2 and 70cm

FTM 400DR: Mobil {GPS, Texting, Photograph viewing, Color Touch Screen}

2 meter and 70cm/50 Watts

FTM100DR: Mobil (GPS)

2 meter and 70cm/50 Watts

FTM3200DR: Mobil

2 meter/65 watt

DR1 and DR2 HT

HAMster Amateur Radio Group

Promoting VHF/UHF Weak Signal Activity since 2006

Get in touch: CW/SSB Phone/Meteor Scatter and EME

SSB Operation: 50.130/144.180 Repeater Operation: 147.120 pl 82.5/145.350 pl 82.5

HAMster Chapters


Due to the nature of VHF/UHF Operations and the desire to promote weak signal activity around the country, we have created sub-groups, to help spread Weak Signal Activity and Training.

As the HAMster Group continues to grow, we will enjoy more DX oppurtunities as well as national activity and contesting....

As we add more Chapters in Cities around the country, we will be updated this link. Providing regional information, activity and events.

Click on the City for more Local Information

San Antonio HAMsters

Houston HAMsters