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Model 102 (aka Model 944) Years -- 1992 to 1994 Drawing References -- Drawing Set D8811-044 Improvements Over Previous Model -- Has 2 rheostats; 1 for control in slowdown block, 1 for startup block Recommended For Use -- Yes.

Model 103 (aka Model AP1) Years -- 1992 to 1994 Drawing References -- Drawing Set D8811-081 Differences -- Used the APS electric eye control, in place of LGB parts. Recommended For Use -- APS eye is not longer available.

Model 104 (aka Model 945) Years -- 1994 to 1995 Drawing References -- Drawing Set D8811-0-- Improvements Over Previous Model -- Control part is a separate unit, built on a laminated template, for built-in wiring documentation. The rear isolating track (10153) detaches, to expand the length of the stop block. Recommended For Use -- Yes.

Model 105 (aka Model 146) Years -- 1996 Drawing References -- Drawing Set D8811-146 Improvements Over Previous Model -- Design has only 1 rheostat, for simpler design Recommended For Use -- Yes

Model 106 (aka Model 146b) - Current Model Years -- 1996 to present Drawing References -- Drawing Set D8811-146 Improvements Over Previous Model -- Design has only 1 rheostat, for simpler design Recommended For Use -- Yes

 

== 2. Two-Track Units ==

Model 201 (aka Model 122) Years -- 1988 to 1992 Drawing References -- Booklet P9105 Recommended For Use -- No. Reason: Lack of adjustable rheostat is not desirable. Other Comments -- This was a simple automatic passing siding. It was the first design made into a formal drawing.

Model 202 (aka Model 163) Years -- 1992 to 1993 Drawing References -- Drawing Set D8811-163 Improvements Over Previous Model -- Added rheostat and blocking. First automatic switching block design. Recommended For Use -- No. Reason: Parts are "scattered" all over track board. No template to document wiring.

Model 203 (aka Model 164) Years -- 1993 to 1993 Drawing References -- Drawing Set D8811-164 Improvements Over Previous Model -- Control part is a separate unit, built on a laminated template, for built-in wiring documentation Recommended For Use -- No. Reason: The control unit is too large.

Model 204 (aka Model 164b) Years -- 1993 to 1994 Drawing References -- Drawing Set D8811-164 Improvements Over Previous Model -- Control part was shrunk down to a more manageable size. Recommended For Use -- No. Reason: The control unit does not have outputs to drive the 4 signal lights.

Model 205 (aka Model 165) Years -- 1994 to 2006 Drawing References -- Drawing Set D8811-165 Improvements Over Previous Model -- Control part was shrunk down further in size. Added 4 outputs to control 4 target lights. Recommended For Use -- Yes Other Comments -- If you added a 2nd rheostat to this design, it would probably be helpful for operation with DCC. (Older models 202, 203, & 204 had 2 rheostats.)