Re: RF filtering resistors

• To: tesla-at-pupman-dot-com
• Subject: Re: RF filtering resistors
• From: dferguso-at-ebmail.gdeb-dot-com (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Fri, 22 Jan 1999 12:42:00 -0700
• Approved: twf-at-verinet-dot-com

i'm planning on using an air core choke / resistor setup as part of my RF
filtering circuit, but when i went to purchase
the resistor ( 500 ohm 50 watt) i noticed that it was coil wound like an
inductive coil ( it had 100 to 200 turns or so , pretty much closely wound,
on about a 5/8 inch diameter ceramic tube about 4 inches long. can i
calculate the inductance of this and
use this value as part of the filtering capability, or is the standard to
"ignore" this intrinsic value of the resistor
and use a separate choke to provide the necessary inductance? - thanks for
any advice, doug

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