|[AMRadio] better meter, same price|
bluebirdtele at embarqmail.com
Thu Sep 24 16:50:11 EDT 2009
My experience with the little red wonders have been mixed. They will blow
if you try to read large amounts of current. Also, on the highest voltage
range there was a 50 v dc difference between the two meters I was using to
check out a plate supply. I think the manufacturer was more interested in
low voltage, low current measurents and didn't really build the unit to
handle tube gear sized power.
The Radio Shack $29.99 auto ranging meter is worse.
Very slow to auto-range and intermittant operation. Blows fuses frequently
I just bought a $20 DMM from Sears and so far, it's seems to be ok.
----- Original Message -----
From: "Jim Isbell, W5JAI" <jim.isbell at gmail.com>
To: "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Sent: Thursday, September 24, 2009 3:01 PM
Subject: [AMRadio] better meter, same price
> The $2.99 meter at Harbor freight has removable leads, 1000VDC and
> 750VAC ranges, Ohms200 to 2000K, 10ADC and 200maAC and includes a
> transistor tester and back lighting. I usually buy 5 each time I am
> in there and I sometimes use them as panel meters in projects if there
> is room behind the panel. Just set them to the scale you want, mount
> behind a rectangular cutout to view the face, use a 9V zener to grab a
> little power from the main circuit of the project....or if you dont
> mind changing the battery, leave it as is. Its cheaper than you can
> buy a panel meter and you can set it to what ever range you want and
> label it below the viewing port as to what it is reading. Save the
> leads for when you connect your bench unit to a high voltage circuit
> with it in AMPS mode and burn up a lead. .......Dont ask how I know.
> BTW, its fused so only the lead takes the hit.
> Jim Isbell
> "If you are not living on the edge, well then,
> you are just taking up too much space."
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