[Milsurplus] Questions on WWI Radio

[Richard]

Yes, I suppose it's a matter of perspective. Trans-Atlantic and 
trans-Pacific  commercial and Navy long wave transmissions were as low 
as 15 Kc,  probably with good signal strength, using crystal sets.  From 
the long-wave perspective, 500 to 1500 Kc. is indeed short-wave.

Richard, AA1P


On 08/24/2014 02:33 PM, COURYHOUSE at aol.com wrote:
> back then   they were SW....   which was our  now  500 to 1500 range....
> In a message dated 8/24/2014 11:23:45 A.M. US Mountain Standard Time, 
> brunneraa1p at comcast.net writes:
>
>     BC-14a crystal receivers were used during WWI to receive spark
>     transmissions from spotter planes overflying the lines. Crystal
>     receivers are not powered; they use the incoming signal, rectified by
>     the crystal, feeding headphones.  Crystal receivers will detect spark
>     transmissions, modulated CW, and amplitude modulated signals. I
>     didn't
>     find the tuning range, but guess it's MW, (medium wave,) 300 Kc to
>     3 Mc.
>
>     Richard, AA1P
>
>     On 08/24/2014 11:02 AM, Joe Connor via Milsurplus wrote:
>     > There's an interesting WWI receiver listed on ebay:
>     >
>     http://www.ebay.com/itm/WWI-1918-Signal-Corps-Crystal-Radio-Receiver-BC-14A-General-Radio-Co-/121416767705?pt=LH_DefaultDomain_0&hash=item1c4500d8d9
>     >
>     >
>     > What frequencies would such a receiver receive? How would it be
>     powered? I have no connection to this sale and the price will be
>     out of my league but I'm curious as to whether a receiver like
>     that could be made to operate and, if so, what one could use it
>     for. What would it have been used for during WWI?
>     >
>     > Thanks.
>     >
>     >                 Joe Connor
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