"N_Cook" wrote in message
...
Again 1m length , ps set for constant voltage and unlimited current.
Set V for 0.5 amps , 2 flats and no change, set for 1A and 4 flats added, no
change ie less than 0.01 amp change, if any.
Set to give 1.7 amp and varnish burnt off. So no further forward.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/




All your testing seems to have verified that the formula for resistance vs.
cross-sectional area does work. No matter how many 'flats' you make on the
wire, you haven't changed its resistance. The small amount that it changed can
easily be contributed to variations in meter connections and/or minute changes
in length due to the squeezing of the wire to make the 'flats'. Barring any
crystalline structure changes in the metal itself, so long as the
cross-sectional area and length doesn't change, the resistance doesn't change.

I suggest that the speaker winding that you're trying to diagnose failed because
of metal fatigue, possibly due to loose mounting, broken adhesive or just an
imperfection in the coil at manufacture.

Time to move on?

--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)

Life is like a roll of toilet paper; the closer it gets to the end, the faster
it goes.