This thread reminded me of a long standing question. The connectors have either black or whitish insert insulators. Are the black for the WW II ARC-5 stuff and the white for the post war Type 12? Best, -John =============== > Jay wrote: > >>Question: when setting up the C-131/ARC-5 R-26 and R-27, is MX-2/ARR-2 [snip]