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If you need an oddball value for some old piece of equipment, this page will calculate different scenarios using standard value precision resistors.

If you need an oddball value for some old piece of equipment, this page will calculate different scenarios using standard value precision resistors.
[–] 1 pt 25d

I work mostly in digital or audio analog so values outside of the classic standards are rare or at least not high power requirements. If a sealed 10-turn trimmer get oxidized or move, then someone fucked with it. I don't tend to build audio power amps or anything like that so I think I'm fine with off-the-shelf multi-pack carbon film or metal film junk from chinkland for most projects.

PPMs- I'm not Marco Reps so I don't have a lot of need for PPMs or get excited about precision metrology. Ballpark suits me well enough.

[–] 1 pt 25d

I understand there are certain fields that don't need that kind of precision.

I'm mostly working with test equipment where that 7.026M resistor in the voltage divider circuit is already fighting the 3% of the movement of the meter itself, so having exact replacements is more of a necessity. My stuff gets beat around and is point-to-point, it's just easier to use fixed values that are meant to be connected with leads.

[–] 1 pt 25d

I'm mostly working with test equipment where that 7.026M resistor in the voltage divider circuit is already fighting the 3% of the movement of the meter itself, so having exact replacements is more of a necessity.

Time to invest in some at home laser resistor trimming gear. :)

[–] 1 pt 25d

Don't think I haven't considered it.