I think that's from late eighties ;
there was so called Apex series - amp & preamp ;
I'm primary interested in preamp article ;
I have just schematics , and tiny fragment of text .
it was comprised of MC stage , MM stage , tone stage and line stage .
PSU was made of repetitive LM317 .
curiosity was that - in best iteration , main semis (except few in MC stage)were BD243 and BD244 .
in case that someone is willing to hit me with both ( preamp and amp ) articles ........ I'll be grumpy all day long 😉
( schematic enclosed - as info )
there was so called Apex series - amp & preamp ;
I'm primary interested in preamp article ;
I have just schematics , and tiny fragment of text .
it was comprised of MC stage , MM stage , tone stage and line stage .
PSU was made of repetitive LM317 .
curiosity was that - in best iteration , main semis (except few in MC stage)were BD243 and BD244 .
in case that someone is willing to hit me with both ( preamp and amp ) articles ........ I'll be grumpy all day long 😉
( schematic enclosed - as info )
