36. MRH13-02-Feb2013-P - page 65

24: One more problem. The
first train made it all the way
through South Jackson and
was entering Mill Bend when
“beep beep beep”, we had
another short.
The South Jackson and Mill
Bend blocks are powered
by two different boosters.
When the loco bridged the
boundary a short occurred.
A quick check with a digital
multi-meter revealed the two
blocks had opposite polarity
rail power.
It appears that when a
Digitrax DCS-100 and
DB-150 are run off a com-
mon LocoNet, the Rail A
and B outpus of the DB150
are reversed from the Rail
A and B outputs of the
DCS100. When the loco con-
nected them, a short circuit
occurred.
I swapped the Rail A and B
wires on the DB150 and all
was well again.
All I can say is “I’mworking
on it” and things are looking
promising.
Time will tell.
24
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