My trc-492 has blown L-7 and Q-19. The parts are charred and cannot be identified. Is there a schematic or manual available to service this unit? Thank you all.Realistic Navaho TRC-492 CB Radio Review I was in between bases in the early 90's when I saw this radio at Radio Shack brand new for just over $100. Haven't got it yet but a friend is gonna drop off a TRC-492 AM/SSB Base. Anyone know anything about this radio? Any mods out there? Thanks Hot Rod does anyone know where to find a manual for trc 43. Realistic Radio do you have manual for realistic DX 440, model 20 Realistic Radio navaho trc-492. Realistic Navaho CB Base Station 40 Channel TRC-492 w/Microphone AC/DC cords and manual. Shows signs of light use but very nice shape. Realistic (Tandy) owners manual. Contains circuit diagram. 3072 kB, 286, Realistic, LAB-2100 · RFT_492.pdf, 25/01/21 . Rare and Ancient Equipment RFT TRC-X23. 23. XTL Syn. n/a. TRC-X23A (21-1136) TRC-492. ***. ***. n/a. TRC-494 (21-1589) Owner's Manual. Radio Modifications. Picture of the Radio.