Hi Avionic!
I have been reading your posts regarding YAMAHA ca-1000....I really need your help on it...I purchased YAMAHA ca-1000 II from a vintage dealer few months back..problem started when right channel went off....found that power transistors along with 47 Ohms resistance are gone, so ordered for replacements ( B817C & 1047E)...in the mean time found another ca 1000 II in a junk market, which was in working state but with a hum in both channels...I replaced the right channel from the newly acquired one... Powered it but relay didn't worked....so i manually switched the contacts with the help of little wooden stick... a screaming noise was observed in right channel....so switched off the amp.....the replacement transistors are in my hands now but feeling hesitation to plant them, coz i think that problem isn't in channel's circuitry (all components were found in working state upon testing) .....Would you kindly help me on it...?