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RE: [TCML] China meters, completed control cabinet
That looks identical to mine. I have two on my 34 kVDC PSU controller; one is the setpoint, and one is voltage. It takes a few seconds to fully charge my 3 10 kV 100 uF caps, so visibility at a distance is nice. Mine are very accurate. If I recall, mine were only $10 each.
Adam
--- On Thu, 3/12/09, Nick de Smith <tesla@xxxxxxxxxxx> wrote:
> From: Nick de Smith <tesla@xxxxxxxxxxx>
> Subject: RE: [TCML] China meters, completed control cabinet
> To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
> Date: Thursday, March 12, 2009, 1:46 AM
> I use these in my control cabinet - they are hopelessly
> confused by RFI- I
> found that by having a decent filter on my HV between the
> meters and the TC,
> the problem largely went away. Note that these meters are
> not True RMS, and
> therefore the current meter in particular will lie a lot.
>
> They do lot cool though - here's a early photo -
> http://www.desmith.net/NMdS/Shack/P1000780.JPG
>
> Cheers
>
> Nick
>
>
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx
> > [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Jim
> Mora
> > Sent: 12 March 2009 01:26
> > To: 'Tesla Coil Mailing List'
> > Subject: [TCML] China meters, completed control
> cabinet
> >
> >
> > Hi Group,
> >
> >
> >
> > Has anyone tried the China made panel meters? The
> illuminated
> > blue background ones look sharp. I have set up three
> analog
> > meters, 0-300Vac, 0-75Aac, and 0-15Aac. Thanks goes
> out to
> > Bert Hickman for teaching me indirectly (like learning
> to
> > fish) how to shunt a meter! Seems foreign calculating
> the
> > resistance of #6awg and cutting it to 6" or so
> for a
> > resistor; silver bearing solder changes the lug
> resistance!!
> >
> >
> >
> > I am wondering if the digitals would survive the EMI
> and HF
> > transients that manage to make it back to the control
> cabinet
> > (hopefully not much). I will have the analogs online
> as well.
> > A cheap goose neck halogen desk lamp was disemboweled
> and
> > mounted to the frame that is on a dimmer like a DJ
> setup to
> > see the meters and controls. I am ready to move on to
> the HV
> > cabinet now. Hurray!
> >
> >
> >
> > I'll post a couple of pictures on the web so the
> younger folk
> > can see old school ;-) The schematics are similar to
> others
> > with the usual contactor's latch, emergency stop
> mushroom,
> > dead man switch, filters, and the addition of a PWM
> ASRG
> > circuit. Current control is a sat reactor driven by a
> small
> > rectified variac, Voltage control is via a Superior
> 1256D
> > that is horizontally stackable-all in a 28" high
> 19" rolling
> > rack mount caninet. Everything stays cool at >
> 60amps for
> > several minutes into several turns of #10 wire. The
> sat
> > reactor buzzes like crazy but stays ambient. It was
> scrounged
> > out of a scientific oven with 5000 hours on it. I
> guess the
> > windings are loosened and rattling. I'd love to
> submerge it
> > in something. It has a silicon steel wound type of
> core.
> > Anyone have ideas on that? Thanks Jack for the find!
> >
> >
> >
> > Looking for bigger sparks!
> >
> > Jim Mora
> >
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
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