SCOPE HO & N scale · every fact cited + dated · “not published” is shown as unknown, never guessed

Which model-train track systems actually interconnect

HO and N scale track lines from different manufacturers don't always say, on their own product pages, whether they'll physically join up with another brand's track. We re-read each manufacturer's own published rail-height (Code) numbers, roadbed description and joiner spec, line them up side by side, and mark every gap the manufacturer hasn't published as unknown — never a guessed answer.

Track interchange

Kato UNITRACK · Atlas True-Track · Bachmann E-Z Track

4 cross-brand checks · 1 same rail code · 1 different rail code · 2 not published by the manufacturer

DCC decoder sockets

7 socket standards · 6 with a decoder model found · 5 locomotive brands · 5 with an official WOWKit listed

Minimum curve radius

10 HO and N sectional track lines · every listed curve radius in inches and mm · 1 with a maker's own locomotive radius statement

Code 83 vs Code 100

6 HO track lines sorted by rail code · rail heights side by side · what the makers list for joining the two

Coupler cross-reference

Not covered yet — Micro-Trains already publishes its own official conversion table, and we only checked 3 of its 14 brand groups, so we wouldn't be adding anything better yet.

How this is built

Nothing here is typed in from memory: each figure points back to the exact manufacturer page it came from, stamped with the day we checked it, and the method page walks through how that gets done. A gap in a table isn't filled with a best guess either — none of the three track lines, for instance, print a roadbed height in millimeters on their own consumer product pages, so that column just says the manufacturer hasn't published it.