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There is a matching set of AAs offered on eBay. 

K-25304   Santa Fe F-7 AA w/Lionel RailSounds, TMCC, Smoke & Electrocouplers

These were offered in 2002 and the B unit may have been produced later.   I have the NP AA set from 2001 (no smoke) plus the B unit that does have smoke.  Also the PRR ABBA from 2005 and all units have smoke.  Difficult to ascertain which has what!

Last edited by c.sam

The early K-Line F-series B-units had two motors each, just like the A-units.  An A-B-A set had six motors, really too much power - I know a guy that got rid of his K-Line WP A-B-A F-set because he had only 4 Madison cars to follow, and the engines moved at low power like there was nothing behind them.  He could not apply enough power to blow the horn because the engines would then go too fast to stay on the track!

Once they changed to TMCC/RS in the A units, they moved the smoke feature to the B-unit, perhaps for space, and perhaps also because an A-A combo with four motors already had plenty of power.

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OGR Publishing, Inc., 1310 Eastside Centre Ct, Ste 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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