[time-nuts] Loran

[Bob Camp]

HI

You can get some pretty crazy propagation at 100 KHz. I suspect they will have to keep the basic modulation close enough to a proper Loran signal or it will create major headaches internationally.

I have not dug out the ppt. Do they list station locations yet?

Bob
 
On Nov 16, 2013, at 6:27 PM, paul swed <paulswedb at gmail.com> wrote:

> Well indeed interesting updates to the ppt. Most of it is the same as the
> earlier decks I have seen so far. Though what I did find interesting is
> they now mention navigation and not just PNT. I will guess with the 4 site
> senario they are back in the navigation business. There is also a small
> note on one slide the coast guard has no interest in supporting this. I
> think thats with respect to maintaining the sites. Someones going to have
> to pay to stabilize those massive lightning arresters.
> 
> As to the monopoly thats been a thread that's run its course about wwvbs
> new phase modulation.
> 
> I will say this as I have listened to the actual signal it is there but not
> as loud as I seem to recall. Also I imagine I am hearing almost a
> continuous GRI as if the whole period is used. No real gaps. Would need to
> actually look at the signal with a scope. Signal levels are good so I can't
> complain and the rcvrs are happy.
> This has been the longest I have had lfphoenix in a number of years.
> Sure hope that it will stick around in a usable fashion. If it does I
> really need to explore a better antenna. I am using the classic boat
> antenna and preamp. I will believe a loop antenna that has a low Q might be
> quite useful. Comments appreciated.
> Regards
> Paul
> WB8TSL
> 
> 
> 
> 
> 
> On Fri, Nov 15, 2013 at 11:33 PM, Dennis Ferguson <
> dennis.c.ferguson at gmail.com> wrote:
> 
>> 
>> On 15 Nov, 2013, at 19:12 , Bob Camp <lists at rtty.us> wrote:
>>> We probably could agree on Seneca NY since that’s about equal distance
>> to the pair of us.
>>> 
>>> Does anybody know the proposed ERP on the new system? Some of the
>> master’s on the China chains are pretty high power if I remember correctly.
>> 
>> This powerpoint presentation
>> 
>>    http://www.tinyurl.com/l2humtb
>> 
>> says the NL40 transmitter they just bought is 300 kW.
>> 
>> I thought a lot of the Asian chains, including China, used
>> Megapulse equipment like the US.  I think Megapulse did use
>> to say their transmitters were multi-Megawatt, but I can't
>> check that since
>> 
>>    http://www.megapulse.com
>> 
>> now goes someplace else.
>> 
>> I wonder whether the last bit means that Megapulse is now out
>> of the transmitter business for good, or if Ursanav's infatuation
>> for the Nautel transmitters is just a passing fancy while they
>> complete their vertically integrated monopoly.
>> 
>> Dennis Ferguson
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