Hello, I just received a dead radio today from a friend. It's a TM-3530A It has poor RX, and needs Q-1 (3SK129s) in the RX RF amp replaced. I noticed that Q2 in the radio is also a 3SK129s, and the schematic shows a 3SK74s. Are these two transistors compatible, or was there a revision the RX RF amp in these radios? This radio was purchased new in 1990, or 1991. Jim.