On Oct 25, 10:28*am, "Antonio Vernucci" wrote:
Can any one explain the rationale behind using both octal and loctal tubes in
the SX-42?

73

Tony I0JX

I don't think there was an obvious rationale behind some Hallicrafters
tube lineup choices.

The SX-110 was introduced in 1959 and made through the 60's, but was
using metal octal tubes - reminiscent of the 1930's - when the rest of
the world (and other Hallicrafters models) had switched to miniatures.

Tim.