RFCOMMSYS wrote:

Why are the old National radios with coil racks called "HRO"? Was it just
National's model number prefix or is HRO an abbreviation for something? And
what was it about the tuning mechanism that was supposedly so great? (That
tuning knob looks really cool).

There was series of radios with the HRO label. Some must date back to the 40's
all the way into the 70's with the HRO500 a great receiver

--
73 and Best of DX
Shawn Axelrod

Visit the AMANDX DX site with info for the new or experienced listener:

http://www.angelfire.com/mb/amandx/index.html

REMEMBER ON A CLEAR DAY YOU CAN HEAR FOREVER