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Rich, are you sure the diode wasn't on the solenoid? When you
remove current from a coil such as a solenoid, the collapse of the field creates
a large voltage spike. Diodes are commonly placed on relays to shunt this
voltage to ground instead of through your radio gear.
Brian Bailey
N94106
----- Original Message -----
Sent: Wednesday, March 31, 1999 6:25
PM
Subject: Voltage regulator
Last weekend, I removed the instrument panel
from N99997. As I was tracing out the electrical system, it was
interesting to note that a diode had been added to the regulator field
circuit. My coupe has a master switch on the panel that operates a
solenoid operated relay at the battery and it sends 12V to the instrument
panel. The master is a two pole single throw switch. One pole
operates the aforementioned solendoid and the second pole open/closes the
generator field circuit from the regulator to the generator. On the
master switch a diode has been added from the field circuit to ground and is
located on the regulator side of the switch. I've been thinking about it
for three days now and I can't come up with a reason. Most of my
reference books on regulators advise on opening the field circuit during
shutdown but none reference a diode. Any ideas???
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