[ARC5] interesting ?

[Jack Antonio]

On 2/23/2018 11:23 AM, Michael Hanz wrote:
   >  Being converters
   > (or frequency mixers if you prefer) rather than complete receivers,
   > they required a separate conventional radio receiver capable
   > of receiving signals in the .2 to 5MHz frequency range,

There seems to be a discrepancy between the information
that was published in the NAVSHIPS manual, and the information
in the manual itself.

The NAVSHIPS listing specifies an output of .195 to 5 Mc, but
the manual only says the attached receiver should tune from 700 to
1300 kc. It goes on to mention that there is a broadly tuned output
circuit at 1000kc. The manuals mentions the ARA specifically,
but says that any good receiver covering the range can be used.

> as well as an external, 
> stable, lower frequency oscillator with rich harmonics (presumably 
> inputted from the binding post antenna connector).  

The manual does not mention or show an external oscillator.

The manual also says there are two antenna connectors, a push post to
use the aircraft's normal antenna(with a note to use the
shortest one possible), and an N connector if a coax
fed antenna is available.

> That makes these curious converters sort of orphans, probably contracted 
> in small numbers to meet a quick reaction need.

Reading the manual seems to indicate that the usage was
intended to be in an airplane, but possible ground usage was mentioned 
in passing.

Jack Antonio
WA7DIA