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[Amps] reducing the reactance of a wirewound resistor

Subject: [Amps] reducing the reactance of a wirewound resistor
From: John Lyles <>
Date: Sun, 05 Feb 2012 01:30:51 -0700
List-post: <">>
Do you mean Aryton-Perry winding? Check it on google.

>> Date: Fri, 03 Feb 2012 09:23:20 +0100
>>> From: Angel Vilaseca<>
>>> Subject: [Amps] reducing the reactance of a wirewound resistor
>>> To:

>>> Hi all
>>> I have a nice large 50 ohms wirewound resistor, which I would like to
>>> use as a dummy load. Problem is, it is inductive of course.
>>> To cancel the inductive reactance I was thinking of winding some
>>> enameled wire all along over the resistor, with as many turns as the
>>> resistive wire, solder the enameled wire to the resistor terminal at
>>> one end and feed the RF at the other two separate terminals (wire and
>>> resistor) at the other end.
>>> The idea is that the inductive reactance of the resistor winding and
>>> the enameled wire winding will cancel each other. With some care and
>>> measuring gear the remaining reactance could be very low. The assembly
>>> would then behave almost as a pure resistance.
>>> Of course, care should be taken not to reach too high temperatures,
>>> because the enameled wire would then be damaged.
>>> Also, the added winding should be wound in the appropriate diraction (
>>> CW or CCW depending of the winding direction of the resistive wire)
>>> otherwise the two inductances would add instead ao canceling each
>>> other.
>>> Has anyone alredy tried this?
>>> 73
>>> Angel Vilaseca HB9SLV

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