[Elecraft] K3 Beta 5r10 and LINK
Walter Underwood
wunder at wunderwood.org
Mon Feb 16 15:00:39 EST 2015
This bad terminology has been around for a long time. My dad’s 1960’s Sherwood amp (maybe an S-5000?) had a switch on the front labeled “PHASE NORM - REV”. That was to save you the trouble of reversing the speaker wires after you got them all connected to the screw terminals. Just choose which ever setting had more bass.
wunder
K6WRU
CM87wj
http://observer.wunderwood.org/
On Feb 16, 2015, at 11:47 AM, 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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