2 BSIAB Schematics: Why Are They Different...?

Started by railhead, May 10, 2008, 11:33:30 AM

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railhead

I was checking out GGG's and Gaussmarkov's BSIAS2 schematics, and I see that M placed D1 to ground, and added C2 to the 9v+ supply.

The original BSIAB2 schematic at GGG has D1 inline with R4/R5/C2, and it does not go to ground.

Why did M do this? Power filtering/protection?

railhead