Are resistors needed?

[richhotrain]

I don't know anything about that particular decoder, but when it comes to 1.5 volt incandescent bulbs, if a resistor is not required it is because there already is a resistor built into the decoder.

Rich

[Hamltnblue]

Not all tsunami's are the same.  The AT1000 is made with the 1.5 volt out and does not need resistors. Other models are 12 volt and need them. 

[JRP]

I am installing a new Tsunami TSU-AT1000 decoder. The instructions tell me that if I wish to use 1.5V incandescent bulbs, that I simply connect one lead to the "1.5V Common Terminal", and the other lead to the appropriate headlight terminal. They don't mention using any resistors. Does this "common terminal" act as a resistor? The same goes with using 12V bulbs. LED's, on the other hand, are required to use a resistor in series. Just want to be sure... JRP Great Southwest and Pacific RR