[sdiy] ebay resistors recommendations for values and quantity

[James R. Coplin]

Thanks!  That list was eminently helpful. I loaded it up into Excel with the
resistor assortments from all the ebay vendors selling 1% lots.
Surprisingly, all of them have a slightly different mix of values.  It turns
out that one seller: http://myworld.ebay.com/apmmall.engineering/ had an
exceedingly good mix based on the list you provided.  

If you purchase 1 lot from them, it contains 61.6% usable resistors which
after shipping works out $18.99 ($.012 each usable).  If you pick up two
assortments, the yield of useful values goes down to 44.5% with a total cost
of $37.98 shipped ($.017 each usable).  However, while the yield is lower,
you cannot purchase the added values for less than purchasing another
assortment.

For an additional $40.83 you can pick up the major values that are either
missing or just short in the above lots from
http://myworld.ebay.com/bigsmythe74/ .  This would still leave you short of
the really common values (of which you would only have several 100 out of
the 1000 or so needed). Out of remaining values from the list that would not
be covered at all, none of them would have more than 38 resistors needed in
total (820 ohm).  Most missing values need less than 10 so pick these up
surplus etc.

Anyhow, bottom line is that for a total of $78.81 shipped, you probably will
never need to make a large resistor purchase ever again.  That is, unless
you plan to make more than 162 modules. Of course, all of this is based on
the info from Andre Majorel's list, so your mileage may vary as per usual.

Thanks for all the input from everyone and I hope this helps someone else
out besides me!

James R. Coplin

> > My question is, is this a good selection of values or are these
> > more odd ball values instead of useful values?
> 
> from http://www.teaser.fr/~amajorel/misc/sdiy-parts.txt based on
> 162 modules from CGS, Jürgen Haible, James Patchell, Oakley, MOTM
> and Tellun :