Opinions: On op amp replacement (resista)

[Martin Czech]

> I use 1% metal film resistors throughout. At my supplier the price difference is marginal. It actually gets cheaper to standardise on one type, as it means half  the quantity to keep in stock (if you buy 100 at a time). Another advantage with the metal film resistors is that they are 0.6W, instead of 0.25W.
> 

Right. I too always use metal film.

You can metal film resistors in a lot of flavours, from 1/8 Watt up too
1 Watt and higher. 

Sometimes, in the case of very high power, you have too take carbon or even wire
wound, (L !!) , but very seldom.

I got a cheap E24 series box, and bought cheap plastic boxes to store them.
Now life is easy, just take the resistor I need, in any cases. No 
need to run to the electronics store saturday afternoon!

Same with caps, get a good series of different values.
If some circuit needs a unknown lag or loop filter etc,
just try them out.

m.c.