In his article "HO knuckle coupler guide" from the ... is required for manual uncoupling. Athearn Trains, under the McHenry Couplers banner, offers plastic double-shelf couplers based on the ...

The article covered both N and HO couplers (the N scale couplers are now offered under the Micro-Trains Magne-Matic banner). The information you'll be most interested in for your HO scale Tyco ...