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PeeCeeBee V4H GB

First some pics of layout, psu, psu & amp. amp closeup, 2 small transistors under board, Mfet's showing pads.

Will get started on some measurements, while waiting for comments.

Layout.jpgPsu.jpgPsu amp.jpgamp closeup.jpgsmall trans.jpgMfets showing pads.jpgMfets pads from end.jpgMfet at amp end.jpgMfet at other amp end.jpg
 
The reason for the question in post#1823 is that with just the amp board mounted on the heatsink (no connection to the psu) and the DMM with COM the black probe attached to heatsink fin and red probe on the amp output. With the DMM in continuity mode I read an OL on the DMM. All the legs on the Mfets are reading OL also.

Earlier comments from shaan indicate that this is correct and one can proceed with further testing. Is this correct?

If I connect the psu to the amp board, heatsink to psu gnd, sgnd and pgnd to psu gnd, with no power applied, then the DMM reads resistance from the output and from the Mfets legs. Is this normal operation also ?

Thanks for the help,
MM