Yes there is Greg. Put the meter in the highest resistance
reading (assuming a Simpson 260), place the knob in the R
times 10,000 position and put the probes across the meter.
If your new meter is a very sensitive meter, it will read up
scale some. If it is a 1 MA movement (I assume it is), then
it won't read much and you can move the knob on the Simpson
to the R times 100 position and the meter should read
upscale. If it moves upscale some and drops to zero as it
should, you will be good to go.
You can do this with a digital meter, but be sure it is not
auto ranging. Your digital meter, if you use one, must have
selectable ranges and you should start with the highest
resistance range and lower it one step at a time until you
see a reading.
73 Jim
W5JO
Thanks Jim. One more question. I have a spare
multimeter. How can I
test it to see if it is good before installing. My first
thought is to
check with an ohm meter, but I wonder if I would damage it
by passing
too much current and pegging the meter. Any tip on a
quick way to test
it.
Greg W5RY
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jim
Wilhite
Sent: Monday, March 05, 2007 9:49 PM
To: Discussion of AM Radio in the Amateur Service
Subject: Re: [AMRadio] Meter Sticking SB-220
Greg:
Try removing the meter and carefully take the face off.
Look between the coil and surrounding core for bits of
metal
or debris that should not be there.
If there is anything, you should be very careful here,
remove the debris and reassemble the meter. Do not use
compressed air or anything that will cause the meter to
peg
hard, for it could bend the needle. If it is metal, you
will have a tough time getting it out since the magnet
will
hold it in place.
Good luck.
If that doesn't work, there are meter shops that will
perform the service for you. Maybe near where you live.
If
you don't feel confident to do this, then check with any
big
airport for avionics repair shops then ask them about
meter
repair shops. Many shops that repair Simpson 260 can do
this easily. If you are steady enough, study the meter
movement and disassemble it for cleaning then reassemble.
This requires the patience and steady hand of a watch
maker
which is another place that might be able to help.
73 Jim
W5JO
----- Original Message -----
From: "Greg Schultz Sr" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, March 05, 2007 9:29 PM
Subject: [AMRadio] Meter Sticking SB-220
I have the multimeter on my amp(sb-220)that sticks above
zero. I tried
adjusting the zero on the face but could not get it to
zero. I remember
reading some time back several emails on this topic. Can
anyone suggest
a fix other than replacing - these meters are very hard
to
locate.
Thanks for any help
Greg W5RY
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