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Thank you 399, I have all the tech bulletins from cbtricks printed out. But cannot find any reference for a cap to go from the collector on the final to chassis ground, or for one to go from the emitter to ground on the driver, although that one can do no harm as the emitter on both the driver and the final are on the PCB ground. But why one from the collector to ground? Right now, I have looked and probably overlooking this, can you reference the number of the bulletin? I found bulletin 1208 referring to the 47 ohm resistor it says from base to ground, mine had been soldered in from base to collector, I think somebody has screwed this all up. My production number is high enough that the only tech bulletins that should have been done after the build is the one referencing the 2 diodes on L3, and that had not been done.

Yes I know about keeping the bias to 15 ma, down from 70 ma. I am going to have to replace the driver and final before I can set any bias though. I am wondering if this is the only problem though.

Thanks, Mike

<blockquote data-quote="Sammitch" data-source="post: 584686" data-attributes="member: 43105">Thank you 399, I have all the tech bulletins from cbtricks printed out. But cannot find any reference for a cap to go from the collector on the final to chassis ground, or for one to go from the emitter to ground on the driver, although that one can do no harm as the emitter on both the driver and the final are on the PCB ground. But why one from the collector to ground? Right now, I have looked and probably overlooking this, can you reference the number of the bulletin? I found bulletin 1208 referring to the 47 ohm resistor it says from base to ground, mine had been soldered in from base to collector, I think somebody has screwed this all up. My production number is high enough that the only tech bulletins that should have been done after the build is the one referencing the 2 diodes on L3, and that had not been done.Yes I know about keeping the bias to 15 ma, down from 70 ma. I am going to have to replace the driver and final before I can set any bias though. I am wondering if this is the only problem though.&nbsp;&nbsp; Thanks,&nbsp; Mike</blockquote>

[QUOTE="Sammitch, post: 584686, member: 43105"] Thank you 399, I have all the tech bulletins from cbtricks printed out. But cannot find any reference for a cap to go from the collector on the final to chassis ground, or for one to go from the emitter to ground on the driver, although that one can do no harm as the emitter on both the driver and the final are on the PCB ground. But why one from the collector to ground? Right now, I have looked and probably overlooking this, can you reference the number of the bulletin? I found bulletin 1208 referring to the 47 ohm resistor it says from base to ground, mine had been soldered in from base to collector, I think somebody has screwed this all up. My production number is high enough that the only tech bulletins that should have been done after the build is the one referencing the 2 diodes on L3, and that had not been done. Yes I know about keeping the bias to 15 ma, down from 70 ma. I am going to have to replace the driver and final before I can set any bias though. I am wondering if this is the only problem though. Thanks, Mike [/QUOTE]

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