resistor/capacitor packs

[scaesic]

does anyone knwo where you can buy a big pack of different valued resistors?
id like something quite like this i found :

http://www.fastcomponents.co.uk/index.php?cPath=39&osCsid=0583cbd67486e77ceb50dcb77f578d55

but id quite like to have 300k resistors, and not 270k's etc.

[scaesic]

p.s what would it make a drastic difference to the circuit if all the components were consistently out by the standard amount. i.e 270k in place of 300k, 27k in place of 30k etc etc.

[petemoore]

I bought a 500 pack from RS yesterday.
 Kindof expensive but it does have 4m7's 2m2's etc big resistors and all the leads are nice and long.
 I haven't seen a 300k 'resistor' but you could put a 27k or 33k series to a 270k, to get 300k.

[scaesic]

yeh i know you can do that, its just the schem uses 300k's etc and the layout on the pcb print out i have only has space for one resistor. and it does that consistently through out the circuit. i know swapping one for a 270k wouldnt make much difference but changing the whole circuit....

[petemoore]

Shape the resistor built from two resistors so that when mounted they're looking like an upside down V.
 27 into 30 = close to 10%, over a few stages it might matter, pretty much depends on stuff too though.
 I'd try hunting down some 300k's or just stick something in there you think'll work.

[Paul Perry (Frostwave)]

Whether you can sub 270K for 300K, unfortunately depends entirely on the circuit. I will say this, though... there aren't many simple FX circuits where a +- 10% change makes a noticeable difference.
And if you are worried that there is only space for one resistor, but you have to make a substitute, make a parallel sub instead of a series one. OK, the maths is harder :x but, just connecting the resistors in parallel takes pretty well the same space (though it's a bitch soldering the second one).

[scaesic]

cheers, i dont think there are any combinations for 300k in parallel, 2 620k's would give 310k though, which is a lot closer than 270 or 330., unless theres another way of doing it, but its a good point, easier than putting them in series over the space for one resistor.
i might try and hunt some 300ks though, they must be somewhere, just not in the standard packs.

[Paul Perry (Frostwave)]

300K is a standard 1% value.
Or if you want common resistors, then 330K in parallel with 3.3M is remarkably close.
A nice parallel finder here:
http://www.radio-electronics.com/info/circuits/resistors_in_parallel/resistors_in_parallel.php

[Joe Hart]

Cool site, Mr. Perry! That's one to bookmark! Thanks!!
-Joe Hart