The 270 I had, as I recall, had the inverter built in. I owned both
radios at one time, well not at the same time. <smile> I thought it was
so cool to have everything in one package. The 260 I had had a tuning eye
and a switch on the back to switch from a c to d c. The 270 did not, you
just switched power cords.
73
Butch
WA0VJR