VK3BLM > GPS 29.03.05 00:28l 28 Lines 1061 Bytes #999 (0) @ WW
BID : 41611_VK3DSE
Read: DL1NAM DJ4KI GUEST
Subj: Koden DGPS thoughts
Path: DB0FHN<DB0MRW<OK0PPL<DB0RES<ON0AR<SV1CMG<VK3AYM<VK3DSE
Sent: 050327/1030Z @:VK3DSE.#MEL.VIC.AUS.OC #:41611 [Narre Warren] FBB7.00g25
From: VK3BLM@VK3DSE.#MEL.VIC.AUS.OC
To : GPS@WW
Andy (G0FTD) asked about DGPS frequencies for a Koden rxcr.
I doubt the Japanese would bother to produce DGPS receivers for VHF when
the official band is 283.5-325 kHz. Our local station is at Cape Shank
~38.30S ~144.53E on 314Khz. and there is another 230 Nm to the east on
318 kHz at Malacoota.
A purpose built DGPS receiver must be able to automatically or manually
tune the allocated 300 kHz band. As well as official Differential GPS
stations there is supposed to be a commercial outfit broadcasting in
our VHF band. I can hear something on the suggested freq of 152.375 mHz
but have never seen a receiver marketed to exploit this.
I have seen cheap looking VHF receivers designed to tune a sub-carrier
on a local FM music station but in my experience in Marine Electronics
have never seen these in the flesh either. I believe these cheap items
were designed to demodulate a sub-carrier above 67 kHz.
So my money is on the Koden being VLF.
Best of luck in your search Andy.
73 Laurie VK3BLM/mm
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