Hi Derek; My Multimeter is a, MASTECH-KT7006A/7224, Analog . And I admit
to much ignorance in reading it.
With the dial set to the 0.5 range on the DCV.A side I get around 40 in the
0 to 50 range, or about 9 in the 0 to 10 range. I get the same reading with
the 0.1/50ua setting.
I was just guessing on what the numbers represented.
As Always I appreciate any comments that will help me understand this stuff.
It would be nice if someone down at the GEEK GROUP would help me understand
my meter but they always seem quite busy when I stop in there. [Message
sent].
Sent: Wednesday, February 03, 2016 7:31 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] VDG belt materials
Doug,
Ive always found the black belts out perform the others, whether
neoprene, latex or pure rubber, I have no idea why.
Regarding your measurements, it is usual to quote a charging
current, rather than a voltage, 9MV did make me wonder just how big your
VDG test rig was, until I clicked that it was referring to 9mV. If you
know your meters internal resistance it should be fairly easy to convert
those voltage readings to uA
Cheers
Derek
On 03-Feb-16 7:05 PM, doug wrote:
For those interested in VDG generators;
I have been testing different belt materials with my VDG test fixture with
some interesting results. The rollers are both PVC, one plain and one with
metal coating and are setup for a 4 inch X 40 inch stretched belt. With
the belt running at 412 RPM or about 1400 FPS the neoprene belt shows 9
MV, the gum rubber belt 3 MV and the blue exercise belt just over 1 MV.
The neoprene and rubber belts are both 1/16 th inch.
Draw your own conclusion but I vote 100% for the black neoprene!
PS; I am not the best at understanding the scales on my multimeter so MV
may not be the proper scale, but I think you can understand the difference
in readings.