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Cigar Box Amplifier grounding and power options

OK, I have a serious question this time :-)

I am building another cigar box AMPLIFIER, using a 2.5W Artec amp circuit, an Artec QDD2 Quadra Distortion Driver circuit (both from site sponsor C.B. Gitty), and possibly a 9v slapback delay circuit of some sort (yet to be determined).

See my diagrams below (and I apologize in advance for my lack of electronics knowledge and poor schematic drawing skills).

I would ideally like to use a single 9V battery to power everything, and have everything on a common ground, as in drawing "A". I have a feeling that this is too easy and simplistic to actually work. Would it?

If not, would I have to use three different 9V batteries, as in drawing "B"? And, will this work as drawn, using a common ground bus?

The $64,000 question: if neither of these layouts would work, then what am I doing wrong, and how can I do it correctly and efficiently?

Remember, I have the mind of a child, so please respond accordingly.

Tags: 9v, amp, amplifier, ground, grounding, power

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Permalink Reply by The Phrygian Kid on July 28, 2012 at 7:53pm

Both will work fine but you'll get better economy from 6 x 1.5v Cylindrical batteries in series

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Permalink Reply by Dave on July 28, 2012 at 10:47pm

Interesting; thanks for the info. Looks like I will give the top drawing a try, and hope for the best. Everyone else agree?

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Permalink Reply by Dave on July 30, 2012 at 7:46am

In case anyone is wondering, I received some fairly complete responses on another forum (TDPRI), and eventually wound up with this diagram. The only addition to this schematic would be an on/off switch for the delay unit.