Planning to deploy an RMS Packet gateway supporting both VARA FM and packet on 145.050 MHz using a single Yaesu FTM-400XD. Running dual mode on one radio can be tricky with timing issues using KISS driver, but AGWPE doesn't have these collision problems. Currently considering Masters Communications DRA-50 vs SignaLink USB for the audio interface. The DRA interfaces are specifically designed as digital radio adapters with fast PTT response that VARA FM recognizes. What are your experiences with audio level calibration and PTT reliability on dual-mode setups?

Been running a similar setup with DRA-30 for 18 months - rock solid. The RA adapters achieve PTT without VOX or COM port, and VARA FM recognizes them immediately for fast switching. Skip the SignaLink for RMS work - too much hassle with VOX timing.

Currently testing RMS Packet with UZ7HO Soundmodem on FTM-400. The KISS driver timing issues are real - getting lots of collisions during message transfers with default RMS settings. Switching to AGWPE resolved most problems.

Word of caution - don't set up VARA FM gateway on a popular packet channel! Learned this the hard way. Also recommend separate frequencies if you have channel availability in your area.