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: Email a link to a friend (Opens in new window) Email Share on WhatsApp (Opens in new window) WhatsApp Share on Telegram (Opens in new window) Telegram Share on Facebook (Opens in new window) Facebook Like this:Like Loading… Related