Hello:

I work through BOM for Placid (HD v1.0) and would appreciate input on the following:
- How critical is 5ma from D1? Can I use 5.6ma diodes I have in stock?
Still need help with this one.

- The value for R12 is 2K, but the part is 271-1K-RC, which is the same as used for R5 & R6. Is 271-2K-RC the correct part or should 1K resistor be used?
Ok, schematic uses 2K.

- The value for C2 & C3 is 220nf, but the part is the same as for C4, i.e. 100nf. Is 505-MKP20.22/100/5 the correct part?
Ok, other posts indicated 100nf is fine. It seems 7.2mm x 7.2mm 220nf caps will not fit the board.

- BC550B/BC560B appears to be obsolete. Can I use BC550C/BC560C instead?
'C' version has higher Hfe vs 'B'. Will use 'C'.

- The value for VR1, VR2 is listed 20K, but the listed part T93YA103KT20 is 10K. Which value is correct?
Ok, schematic uses 10K. BOM has a typo.

/Dmitry

Edited by user Wednesday, December 21, 2011 5:22:24 PM(UTC)  | Reason: Not specified