RF Systems DA-4. Posted on November 9, 2013 by remotedx The RF Systems DA-4 distribution amplifier using up to four receivers from one antenna without signal loss and with full isolation. Usable range is 10 kHz to 50 MHz. Share this: Click to email a link to a friend (Opens in new window) Email Click to share on WhatsApp (Opens in new window) WhatsApp Click to share on Telegram (Opens in new window) Telegram Like Loading... Related