[ARC5] More on the "No HF" Myth

[Mike]

David Stinson wrote:

> I pulled out some of my documentation- circa 1945-
> last night and started counting.
> It's important to note that this documentation does
> not address portable or temporary DF and Comm stations.

I've got a Collins 18S-4 radio set chock-a-block full with HF AM
frequency crystal controlled channels (20) covering 2 to 15 mcs.  The
18S is a commercial set for larger aircraft used in the 1950s and early
1960s covering 2 to 18 mcs (there was a nearly identical military
version called the AN/ARC-59 using the RT-380/ARC unit).  I assume the
frequencies in my set were ARINC frequencies for the most part, although
my set contains a channel on the common-use 3023.5 kcs, and 2182 kcs as
well.

Commercial airborne HF USB is still to be found all over the HF spectrum
(example: 3016, 5550, 5598, 5649, 8879, 8906, 13306 kHz) under the very
active Aeronautical Radio, Inc. (ARINC) organization.

Mike / KK5F