by KC8WJG
We have a 1969 ex-SP SW-1500. It has a service selector with four settings:
Road
Switching 1
Switching 2
Series (Forestalling)
The only two we have ever used are switching 1 and road. I briefly put it in switching 2 for a few seconds and if I remember right, it started loading with the throttle in the idle postition. What is the difference between switching 1 and 2? And what would the series/forestalling position be used for. I understand that this switch basically controls the transition phases of the motors, but would like someone to clarify exactly what modes the unit is in in each of these positions.
Also, while I'm at it, another question. This unit of ours is leased from LTE Rail and has no alarm bells and doesn't appear to have any low water or crankcase buttons. Is this normal for this model or am I not looking in the right spots?
Road
Switching 1
Switching 2
Series (Forestalling)
The only two we have ever used are switching 1 and road. I briefly put it in switching 2 for a few seconds and if I remember right, it started loading with the throttle in the idle postition. What is the difference between switching 1 and 2? And what would the series/forestalling position be used for. I understand that this switch basically controls the transition phases of the motors, but would like someone to clarify exactly what modes the unit is in in each of these positions.
Also, while I'm at it, another question. This unit of ours is leased from LTE Rail and has no alarm bells and doesn't appear to have any low water or crankcase buttons. Is this normal for this model or am I not looking in the right spots?