From: "Gary - G4WGT" <g4wgt@tiscali.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <4956BFEE.19110.2EE6D21@v.d.heide.on-line.de> <001601c968e6$912297e0$4201a8c0@home> <49579EF3.2070109@g3ysx.org.uk> <007f01c96908$00821630$6401a8c0@asus> <4957DD57.9000105@g3ysx.org.uk>
Date: Sun, 28 Dec 2008 21:10:26 -0000
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Subject: RE: LF: Re: WSPR and CW
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Stewart, LF,

In view of your comments below I had a look at the Windows XP method of
synchronising the PC clock, here are the first few lines :-
>>>>>>>>>>>>>
Synchronizing your computer clock
If your computer is a member of a domain, your computer clock is probably
synchronized automatically by a network time server. If your computer is not
a member of a domain, you can synchronize your computer clock with an
Internet time server.

If synchronization is enabled, your computer clock is synchronized with an
Internet time server once a week.
>>>>>>>>>>>>>>>

NOTE THE LAST LINE.

Once a week is not at all useful with most PC's & WSPR time accuracy.

Gary - G4WGT.


-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Stewart Bryant
Sent: 28 December 2008 20:11
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Re: WSPR and CW

Gary - G4WGT wrote:
> Stewart, Jim & LF,
> 
> I can recommend Dimension 4 saftware, I have it automatically set the PC
> clock every 15 minutes.
> 
> 73
> 
> Gary - G4WGT.
> 


"Dimension 4 uses one of a few well known and broadly implemented 
internet protocols to connect with publicly available time servers that 
have been operating on the Internet for over 15 years. These time 
servers typically have their very own atomic clocks, or are directly 
connected to other machines that do."

That looks like an NTP implementation to me. Most of these are a port
of the code written by Dave Mills' team at University of Delaware

http://www.eecis.udel.edu/~mills/ntp.html

NTP is free in XP, Vista, Linux, OSX and most other operating systems
I can think of.

Stewart/G3YSX