Topband: EP6T and outside world

[Paul Christensen]

>"Commercial transmitters and receivers for 160 meters have long been
>available." 

To Frank¹s point, here are some additional early commercial 160m receiver
examples: 

National SW-3 (ca. 1931 regenerative with dedicated 160m band spread coils)
National HRO (ca. 1935 with sliding 160m coil drawer and bandspread taps)
National NC-101X (ca. 1938 with 160m sliding catacomb assembly).

Produced in 1931, the National SW-3 may be the first commercial receiver
with dedicated 160m operation.

For Hallicrafters and Hammarlund, I¹m not sure how early these
sets were produced with a 160m band-spread position.  For Hammarlund,
possibly the first Comet in 1934 with plug-in coils.

For commercial transmitters, Collins had 160m coil sets going as far back
as 1935 with the 30FX and 30FXB and similar variants on these models.  I
own a ca. 1935 Collins 30FX with three 160m coils (Osc., Buffer, and 211
Final).

Paul, W9AC