Mojo Tech - This very cool Yamaha RA-50 amp with rotating... | Facebook
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120VAC/60hz small electric motor overheating on lower supply voltage.. some type works OK ..... - Electric motors & generators engineering - Eng-Tips
Yamaha RA-50 rotary speaker amplifier, made in Japan, ser, no. 2663, dust cover
Studio Sophronik - Le fameux son de Leslie à la David Gilmour ! ••••• Yamaha RA-200 Rotating Speaker Amplifier 200 Watts 4x12" 1976 ••••• "The Yamaha RA-200 was introduced in 1976 and