|[AMRadio] Meter Sticking SB-220|
Greg Schultz Sr
w5ry at cox.net
Tue Mar 6 09:15:04 EST 2007
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
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] 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
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.
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.
----- Original Message -----
From: "Greg Schultz Sr" <w5ry at cox.net>
To: <AMRadio at mailman.qth.net>
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
> Thanks for any help
> Greg W5RY
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