While disinterested in chasing DX on FT-8 in recent weeks, I stumbled upon a new-to-me digital signal at 14.105. After a quick investigation, I discovered it was VARA, a proprietary system developed by Jose Alberto Nieto Ros EA5HVK. It’s designed for reliable data transmission, using various modulation techniques to transmit data over the radio.
This modem brings military-grade technology to amateur radio, operating within a bandwidth of 2400 Hz in the SSB spectrum. Its standout feature is maximizing data transmission efficiency over radio frequencies, utilizing sound card technology for encoding and decoding information. VARA’s exceptional performance in adverse conditions sets it apart, ensuring reliable communication amidst noise and interference. Enthusiasts admire its adaptability and resilience.
VARA’s versatility extends to transmitting text, images, and diverse digital formats, making it a go-to choice for casual conversations and critical scenarios, especially emergency communications. Its prowess in maintaining communication channels in adverse conditions makes it invaluable during crises. Integrated with Winlink, VARA significantly enhances data transfer rates and reliability, which is particularly beneficial when traditional communication infrastructure is compromised.
VARA is transforming amateur radio communication by providing robust, efficient data transmission, especially crucial during emergencies. Its ability to transmit various data formats and integrate with existing systems like Winlink makes it an indispensable tool for effective crisis management.
Setting up the system is simple for those familiar with tech and computers. Since my system was already configured for WSJTX, I found VaraAC easy to set up and made my initial contact within 15 minutes. The HF modem part of the software operates as shareware, displaying occasional nag screens and reducing transmission speeds. Despite this, it’s speedy enough to communicate with other stations without causing much frustration.
More information:
https://rosmodem.wordpress.com/
https://www.varac-hamradio.com/
Give it a try, and let me know what you think!
73 de W0WC
