To: <amps@contesting.com>
> Date: Wed, 03 Jun 1998 19:17:09 +0100
> From: "Ian White, G3SEK" <G3SEK@ifwtech.demon.co.uk>
> Subject: Re: [AMPS] Non-inductive resistors
> To: amps@contesting.com
Good day Ian.
> 43.5 nH to 49.3 nH measured; 48.6 nH calculated from the standard
> formula for solenoid coils.
>
> Maybe that was lucky, but it seems like the formula is a good place to
> start, for those of us without network analyser.
Gosh, what luck! ;-)
All I usually do is scrape the outside off and look at the guts. If
it's a coil with multiple turns, I don't use it as a suppressor
resistor without measurements.
I certainly would never try to measure the inductance of a five turn
air core inductor at 1 kHz.
> >By the way that
> >inductance changes if I place the resistor near any other conductors.
>
> As it would for any type of non-shielded inductor.
Just wait 'til you wind a coil over the resistor! 50-50 chance
anyone?
73, Tom W8JI
w8ji.tom@MCIONE.com
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