07-08-2011, 06:45 AM
Well went to the NMRA site and looked under the standards and recomended practices and found that for On30 calls for HO couplers and the same height from rail to coupler as HO where as On3 sits a bit higher 
here is a link to the standards for couplers
http://www.nmra.org/standards/sandrp/pdf...010.07.pdf
Do why is the kadee On30 height gauge sold with an On3 coupler? :?
here is a link to the standards for couplers
http://www.nmra.org/standards/sandrp/pdf...010.07.pdf
Do why is the kadee On30 height gauge sold with an On3 coupler? :?