[time-nuts] Loran?

[paul swed]

Loran c in NE US.
Definitely acquired only 9007 on the austron 2100 and 2100f.
The systems can lock in as little as 20 minutes at the fine time of 0300
local.
But most likely after midnight to most likely 4 in the morning.
Now would be the time to have the HPIB interfaces and I don't. Would be able
to figure when the window is open to the US.

Using the antenna in described in this thread. The signal was at 77db on
both receivers. The signal to noise or noise (Have never under stood the
figure in austron sense) is 637 and a bad sig is 238. Old 9960 chain Master
60 miles was 37db as a reference.

Still see the noise burst signal and pretty sure its nothing within the
house. Everything was pretty much off at 0300.

The sky wave signal worked pretty well.
The 2100f is locked to GPS through a HP 3801 consistent at -2.4 e -9
The 2100 is locked to RB reference house and -1.5 e -10.
Kind of interesting that gps is not as good as the rb that I tuned when I
had local loran.
But clearly both are down in accuracy from what I have seen. Skywave
effects?

Regards
Paul
WB8TSL

2010/12/20 paul swed <paulswedb at gmail.com>

> Interesting
> Just barely I may be seeing several chains on the east coast of the US near
> Boston.
> I am using a austron 2100 and a 2100F. Definitely see it trying to lock and
> its does go into settle mode. But I am afraid I may have some nasty
> switching power supply of some sort nearby. I see a bursting noise signal
> semi synchronous at 100 KC. Never seen this before.
>
> I seem to see 9007 and 6731 the best. 7499 nothing and would say 7001 quite
> weak.
> May have to go to the older Austron 2000c and take a look. That gives me
> much more flexibility in control to confirm that I can see the signals.
>
> Antenna is a Loran preamplified antenna (No idea the model hamfest
> stuff) with a fiber glass whip 7' tall wound with hundreds of turns of #26
> gauge wire as a single layer. Approx 6 ft off the ground.
> Regards
> Paul
> WB8TSL
>
>
>
> 2010/12/20 paul swed <paulswedb at gmail.com>
>
> Thanks Poul will do its long enough past sunset to start hunting.
>>
>> On Mon, Dec 20, 2010 at 5:45 PM, Poul-Henning Kamp <phk at phk.freebsd.dk>wrote:
>>
>>> In message <AANLkTi=KYamMSdN7KoMCPBs8iGw=EXzxm7NQ767-+TOc at mail.gmail.com<EXzxm7NQ767-%2BTOc at mail.gmail.com>>,
>>> paul
>>>  swed writes:
>>>
>>> >Well to be honest when I typed loran it was simply because I felt like
>>> it.
>>> >It was more important to communicate the fact that I couldn't here and
>>> >european stations in the northeast us. Thats all that mattered. Caps or
>>> >lowercase simply no longer matters to me on the dead us service.
>>> >So getting back at it I will fire up a different antenna and preamp and
>>> give
>>> >it one more shot.
>>>
>>> Make sure you listen on the correct GRI's, some tables still list the
>>> long abandoned 3-digit USCG chains, rather than the 4-digit NELS chains:
>>>
>>>        Eiği, GRI=9007
>>>        Lessay, GRI=6731
>>>        Sylt, GRI=7499
>>>        Værlandet, GRI=7001
>>>
>>> For what it's worth, I have never been able to more than barely detect
>>> the 9960 chain from here in Denmark, and that was only after a major
>>> DSP exercise...
>>>
>>> Poul-Henning
>>>
>>> --
>>> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
>>> phk at FreeBSD.ORG         | TCP/IP since RFC 956
>>> FreeBSD committer       | BSD since 4.3-tahoe
>>> Never attribute to malice what can adequately be explained by
>>> incompetence.
>>>
>>>
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>>
>>
>