Yes, the filters are the same, and you can mix 'N match them. I have an Inrad 2.1kHz in the rx side, and a Yaesu-Collins in the tx side. Jim ---- Sent via amsat-bb@amsat.org. Opinions expressed are those of the author. Not an AMSAT member? Join now to support the amateur satellite program! To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org