Avoiding Passive-Component Pitfalls, Grant and Wurcer

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Avoiding Passive-Component Pitfalls, Grant and Wurcer

Postby mediatechnology » Mon Mar 06, 2017 9:07 am

"Avoiding Passive-Component Pitfalls," Doug Grant, Scott Wurcer, Analog Dialog, 17-2, 1983.

The wrong passive component can derail even the best op amp or data converter. Here are some basic traps to watch out for.


"Avoiding Passive-Component Pitfalls," Doug Grant, Scott Wurcer, Analog Dialog, 17-2, 1983. http://www.proaudiodesignforum.com/imag ... 2_1983.pdf

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"Avoiding Passive-Component Pitfalls," Doug Grant, Scott Wurcer, Analog Dialog, 17-2, 1983. Thermal gradients create significant thermoelectric circuit errors.
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Re: Avoiding Passive-Component Pitfalls, Grant and Wurcer

Postby emrr » Wed Mar 08, 2017 12:10 pm

Good stuff.

I recall a manufacturer of simple class A tube listening amps changing to PCB construction because they found it impossible to use point to point techniques and deliver consistent results on the bench.
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Doug Williams
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Re: Avoiding Passive-Component Pitfalls, Grant and Wurcer

Postby NOON » Tue May 16, 2017 1:55 am

So does this imply that if you have a vertical board (e.g. front panel mounted, eurorack or 500 series style) you should be mounting the resistors 'tall' instead of flat on the board? ;)
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Re: Avoiding Passive-Component Pitfalls, Grant and Wurcer

Postby mediatechnology » Tue May 16, 2017 5:20 am

So does this imply that if you have a vertical board (e.g. front panel mounted, eurorack or 500 series style) you should be mounting the resistors 'tall' instead of flat on the board? ;)


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If they are horizontal and mounted flat on the vertical front panel board the thermal gradient wouldn't develop end-to-end.
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Re: Avoiding Passive-Component Pitfalls, Grant and Wurcer

Postby JR. » Wed May 17, 2017 1:57 pm

Thermal gradients in resistors is a bit too tweaky for typical DIY electronics. Kind of a true but so what...

Probably a good article.

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