[AMPS] Non-inductive resistors

[Tom Rauch]

> 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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