Hi John; the separate reverb amp circuit board from the earlier Thunderbird - the 'dinette' model - was dispensed with in this later model. See pic #2 at the front of this thread.john_kidder said:Mr. No-Electrical-Training asks: Isn't the reverb powered by a separate power amp section?matsickma said:If the preamp is OK I'll drop in the 6550 power amp section from a Quantum.
The reverb can is separate but the 6GW8 reverb tube (formerly 6BM8 in early TBirds and T1 RVTs) is now integrated into the 'control / preamp' chassis in this model. Also and based on the not-exactly-matching ThunderStar 'lead' schematic (split chassis, 7591s), the reverb can is coupled to the circuit by a small, impedance-matching transformer, like Fender, rather than a speaker as Guild did with the T1 RVT and earlier model Thunderbird.