you got it, the difference isn't the voltage itself [no V rating on the glass fuses] but the greater [6V] or lesser [12V] amp draw on the 2 voltages, 12V systems use ~ 1/2 the amps - the 12V radios call for a 7.5a fuse, so I'd expect that the 14a is what you want

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics