Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Greg Codori" <greg_codori@h...>
wrote:
... 
> http://www.elfa.se/pdf/71/07104979.pdf
> bc337b - Philips general purpose transistor
> elfa #71-072-46
> $0.21 EU

mouser lists it for $.06 (yes, 6 cents) but doesn't stock.  I'd sub
with a 2n2222A or 2N4401

> 
> http://www.vishay.com/docs/88501/1500z.pdf
> b40c1500r - 1.5a bridge rectifier
> elfa#70-050-93
> $1.08 EU

mouser carries three direct cross refs for this, $.27, $.52 and $.57.
But, any 1.5A or higher bridge rect will do.  

> 
> I would be most appreciative if someone could find parts that match 
> the specs.  As this is for a power source, the specs can't be "close 
> enough" (I've found plenty of parts that are close but not quite).

With out seeing the schematic, its hard to say to 100% but I seriously
doubt you'll have a problem with those substitutions.  The transistors
have a slightly lower absolute max current rating but better Hfe and
the same power dissipation ratings (same package).  I'd believe the
power rating before the absolute max current - the designer should
have stay well away from the max numbers.  And rectifiers are a
commodity. Look at it this way, since the cost of shipping more than
the rest of the parts combined, what's the cost of blowing up ALL the
components (which you wont)?  Personally, I would sub them in a heartbeat.

Phil