|[AMRadio] Meter Sticking SB-220|
w5jo at brightok.net
Mon Mar 5 22:48:43 EST 2007
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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