replacement/substitute parts

For replacement/substitute parts, see this forum topic

LadyAda ships with these replacements, with no noticeable sound differences

• 733p instead of 733ap
• BA6110 instead of BA662a

SubAtomic has done some analysis of these, and has found BA6110 to be only slightly different, yet perfectly acceptable (perhaps even more desireable: it produces the exact sound only a little louder, which can be a useful thing to slightly overdrive the mixer output for a little distortion)..

• high beta 733p and low beta 733k instead of 733ap (analysis)
• BA6110 instead of BA662a (analysis)

MomeRath reports that replacing these causes no sound difference:

• Using NTE44 instead of 2SC2291
• Using 2SC945P for 2SC536F (LoopStar and danyool001 reported this as well)

Unverified (these may or may not sound the same, please do testing and post results!)

• J201 for 2SK30A
• lm13700 for ba6110
• nte42 for 2SC1583
• lm358 for an6562 (possibly also LM358N, NTE928SM, NTE928M, NJM2904D)
• NTE85 for 2SC536F (possibly also NTE289)
• NTE1465 for LA4140 (possibly also NTE165)

If you find other substitutions that still maintain the original sound, please post your results in the above format…