[Milsurplus] USN RTTY

[Mike Morrow]

Hue wrote:

> But certainly a ship large enuff to carry TTY equipment
> would also need people trained in TTY maintenance, and
> also spare parts and even whole spare units for swap out.
> You do not have that in WW2 submarines.

Plus, the addition of a teleprinter also requires demodulating
electronics between the printer and the receiver.  In WWII, such
FSK converter units were large and heavy.  I believe that the
100 lb. USN model FRA unit was the smallest WWII-era unit, but
it was designed specifically to couple into the IF path of RBB
or RBC receivers.

http://jptronics.org/radios/Military/JANAP161/an.ugaurr/an.uga-type.fra.pdf

Nothing appears to have been developed for TRF/regenerative
receivers like the RAK and RAL, which were most common in US WWII
subs.

Mike / KK5F