M5222Fp: Electronic Attenuator (Bpf/Vca Ic3); M57729Uh-P, M57729Sh-22, M57729L-22, M57729H-01-P: Tx Power Amplifier (Final Unit Ic1); Mb504F: Prescaler (Tx Pll, Rx Pll Ic1) - Kenwood TKR-820 Service Manual