silvertone roundie problem

[timmy]

ok well got this thing running problem is i cant set it up on the bar dot gen because the verticle and horizontal are so unstable i cant get it to stop. the detect diode, double 3 leg diode if this were bad this could very well be the problem ? and i have no sound whatsoever and im at a loss now as to why. any help would help me greatly at this point. would the detect diode be the same from rca to this silvertone chassis, they both look the same and they are both roundies.