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Re: RF filtering resistors
Yep.. wirewound resistors do posess an amount of inductance, this causes
much trouble in certain types of ccts thus cannot use them for
those...In your case the inductance of the res will perhaps contribute
to the system's desired effect, but it will probably not be high and it
is normal not to take this into account unless a minimum of inductance
needs to be aachieved as in rf ccts - it would be best to calculate and
build the req'd inductance as a separate component.
Dan
>Original Poster: dferguso-at-ebmail.gdeb-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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