Athearn Genesis G999 HO Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3820 DCC/Sound Era_1954-1967 The issue with powering a

The issue with powering a frog is that you have to switch the power to the same polarity as the points when the turnout is thrown

Walthers Mainline 910-7476 HO Scale 50' PS-2 CD 4427 Covered Hopper SOO Line 70231

A variable PWM clock frequency from 10kHz to 50kHz ensures super-quiet operation

Athearn 71036 HO Scale 50' Superior Plug Door Boxcar Canadian National CNIS 408029

Athearn Genesis G999 HO Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3820 DCC/Sound Era_1954-1967 The issue with powering aAthearn Genesis G999 HO Scale 4 6 6 4 Challenger w Oil Tender Union Pacific UP 3820 DCC Sound ALCO constructed the first 4 6 6 4 locomotives in the world, numbered 3900 to 3914, for the Union Pacific Railroad in 1936. These huge engines were named the Challenger Simple Articulated, or CSA 1, class. The railroad received 25 near copies, classified as CSA 2, the following year. Unlike compound Mallet engines that crawled along with drag freights, the