[ARC5] Is Ebay "on air"?

[Kenneth G. Gordon]

On 15 Sep 2014 at 11:41, J Mcvey via ARC5 wrote:

> What is the function of that FT310 ?

To connect to external navigation equipment.

In fact, the R-24 also often had a similar adapter. I have had several 
(hacked) versions here that contained one. Robert Downs certainly knows far 
better than I which one was sometimes included with the BC band models.

In the Navy manual on the ARC-5 system, both the 190 - 550 kHz receivers 
(R-23*/ARC-5) and the BC band (R-24) were included in the section on 
Navigation Receivers. All the others were listed as Communications 
Receivers.

> I am also curious about the multiple antenna terminals. Are those for loop OR
> long wire?

An external loop. The R-23 also has those, as do many models of the 
BC-453, especially the later models. I don't know the model number of the 
loop which was commonly used with those receivers, though. But I'll bet 
Robert does.

> The extra knob tunes the loop?

No. It is simply a switch to switch the input between the regular antenna 
connector and the loop connections.

Ken W7EKB