2270 Manual Errors

rmorano

Active Member
Hello,
Recently re adjusted my 2270 s to the revised idle current spec, from J754 to J760, set to 10mv.

They seem to sound a bit more powerful and full, what has everyone experienced with the new settings ?

My original 2270 was at 5mv for 42 years and was fine I thought

Thanks
 
The earliest ones had different power amp boards and the places to clip to measure were different than the later ones. The earlier ones were adjusted to 5mV and the later ones were adjusted to 10mV. It could easily be that the older method was measuring across one emitter resistor vs. the later one being across two resistors so really it's the same idle current. You may detect a change in sound but there is no more power.
 
Thanks for your reply, adjusted to 10mv, yes the sound changed it seems fuller and brighter more like my 2275 is. No other changes are noticed
thanks again
 
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