Akai RC-90(RC-21)$74 (or on eBay for $79) Wireless Remote adapter for Reel to Reel:GX-77, GX-77BL,GX-646andGX-747(dbx). Cassette Decks: CS-F9,CS-F11, CS-F21, CS-F33R, CS-F36R,CS-F39R, GX-F15,GX-F25,GX-F35,GX-F37,GX-F44R, GX-F60R, GX-F65,GX-F66R,GX-F66...