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Marantz 2270 bias won't go below 15mV

catrafter said:
Many people have had good success using MJE150XX TO-220 transistors as drivers in the 2270 and other models.
If I could not get the original TO-66 2SC680 and 2SA566 types I would probably use KSC2073 and it's complement, KSA940 TO-220 devices as substitutes.
(no settings on the scope or curve tracer were changed between photos)

2SC680 (2270 original NPN driver)


KSC2073

MJE15030

YMMV,
Tom

Oops, fixed the pics
Click to expand...

Circling back to this to see if anyone has tried KSC2073 and KSA940 as subs for the 2SC680 and 2SA566?
 
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