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....they suffer just the same deficit as the style of meter
that loses narrow power consumption spikes of
naive experimenters - it's still a bandwidth issue.
You certain about that?
I thought, well maybe the inertia of wheel and armature
absorbs the
pulse and because of the very low source impedance
there's no "over
shoot", so the spike will be ignored. Then I thought
of the ballistic galvo. wherein the spike (e.g. discharging cap.)
is over before the armature moves. OTOH the BG is shunted by a
CDRX not way over damped (milliOhms). To test this at some point
I'll drive one of my d 'Arsonval wattmeters (light bulb loaded) w/ an
amp driven by a pulse generator, and a filament transformer for Z
matching. O'scope observation, natürlich.
bc can't wait, but already convinced.
Variacs are helpful for maintaining power waveforms -
but they don't come cheap.
p.s. Mark K. found two and gave me one at the San
Francisco City
College surplus give away a few weeks ago. At one time
RAFT had a
few for a few $$ ea.
On 2009, Jan 01, , at 19:42, Brian Whatcott wrote:
Sad to tell, though spinning disk watt-hour meters ofthe kind used
to meter4% at low loads
domestic consumption are required to register within
and 3% at higher, even inductive loads - they sufferjust the same
deficit as the style of meter that loses narrowpower consumption
spikes ofissue.
naive experimenters - it's still a bandwidth
but they
Variacs are helpful for maintaining power waveforms -
don't comeaquarium heaters for
cheap.
BrianW
At 09:20 PM 1/1/2009, you wrote:
This allows me to advertise my collection of
transformers (Variac) invery little $. ... Aren't variable auto
meters were offered byplentiful
supply? AND at one time (now too?) watt-hour
principle of one part ofsurplus houses. Since they operate on the
current, no problemthe motor sensing the potential and the other the
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-lw/ PF.
....
Brian Whatcott Altus OK Eureka!
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