Where can I buy a few PRECISION Capacitors?

[olds...@tubes.com]

Where can I buy a few PRECISION Capacitors?

Now you guys cant say there have been no posts here since December 2016.

The schematic for this (1960's era) Eico 950b capacitor tester calls for
a 2 mfd, .02 mfd, and .002 mfd, they must be PRECISION caps to make this
thing accurate to test the caps being tested on it.

It seems that resistors are rated at 1% or better, but not caps....

Thanks

[Peter Wieck]

There are precision capacitors - and the likes of Mouser, Allied & Digikey all stock them - just use the screening tool.

At the same time, your garden-variety Fluke meter will measure a cap +/-1% - so purchase half-a-dozen of a given value, and screen for the precise value you need. Generally when it comes to low-value 600V plastic caps these days, they are far more precise off-the-shelf than anything not hand-screened in the 60s. I check _EVERY_ cap before I install it - and seldom have I found a modern-production cap off its printed value by more than 5%, and most of them fall within the 1%.

I keep all the values you need - it would be the work of a few moments to screen out a bunch for you.

Peter Wieck
Melrose Park, PA