[Elecraft] K3 Beta 5r10 and LINK

[Stephen Prior]

To my simple minded (physics) view of things, polarity is to do with the
direction in which the loudspeaker cone moves for a given direction of
audio frequency current (Fleming's left hand rule etc.).  So if two
speakers have the same "polarity" then they will both move forwards or
backwards at the same time, irrespective of the frequency (assuming they
are being fed with the same signal of course!).  Phase differences can only
have any meaning for a given frequency and can have maximum values of +/-
180 deg, +/- pi rads etc.

It is easy to see how the confusion can exist.  Interestingly, an old pair
of AR speakers I own have a 'polarity' switch.

73, Stephen G4SJP


On 16 February 2015 at 19:47, Clive Lorton <clive at thelortons.co.uk> wrote:

> On 16/02/2015 19:27, Jim Brown wrote:
>
>> You (and Heil) are using the word "phase" incorrectly when you talk about
>> "reversing" it. What that switch is doing is reversing the POLARITY.
>> Polarity has two values -- normal and inverted. Polarity is the same for
>> all frequencies. Bob Heil, who claims to be the audio guru should know
>> better -- the word polarity has been used in this manner in pro audio for
>> nearly 40 years.
>>
> I understand the word polarity and I understand the word phase after 40
> years in the audio industry I've never known a loudspeaker (or other
> transducer) to be out of polarity.
>
> From Wikipedia: *"Phase difference* is the difference, expressed in
> degrees or time, between two waves having the same frequency and referenced
> to the same point in time.^<http://en.wikipedia.
> org/wiki/Phase_%28waves%29#cite_note-Ballou2005-1> Two oscillators that
> have the same frequency and no phase difference are said to be *in phase*.
> Two oscillators that have the same frequency and different phases have a
> phase difference, and the oscillators are said to be *out of phase* with
> each other."
>
> Clive G8POC
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