I have been using a Radio Shack switching power supply (part number RS
22-507), which is a 13.8 volt, 3 amp supply both to power my K2 and to
power a test setup for a microcontroller project. The output is clean
and stable when the unit is powered on.
However, the supply is exhibiting a strange behavior when the unit is
turned off. It puts out a short full-voltage pulse (~0.2 second) at
intervals of several minutes. These pulses occur whether the supply is
connected to a load or not. It is not related to anything on the AC
input side. The same behavior was seen at a temporary lab I set up in
Rhode Island and here in my lab in Denver.
I wonder if any of you have had a similar experience with this model or
any other switching supply. If so, please let me know.
73,
Gus Hansen
KB0YH
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