> Message: 1
> Date: Fri, 28 Dec 2007 15:19:49 -0800
> From: Brooke Clarke <[EMAIL PROTECTED]>
> Subject: Re: [time-nuts] accurate portable time source
> To: Discussion of precise time and frequency measurement
> <>
> Message-ID: <[EMAIL PROTECTED]>
&g
Brooke:
Have you tried out your last idea at least in a test configuration?
Ronald
Message: 1
Date: Fri, 28 Dec 2007 15:19:49 -0800
From: Brooke Clarke <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] accurate portable time source
To: Discuss
Clarke <[EMAIL PROTECTED]>
> Subject: Re: [time-nuts] accurate portable time source
> To: Discussion of precise time and frequency measurement
><>
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset=us-ascii; format=flowed
>
> Hi Ronald:
&
Brooke:
You have been thinking about this longer than I have. I presume you
have not tried to make any prototypes?
Ronald
Message: 1
Date: Fri, 28 Dec 2007 15:19:49 -0800
From: Brooke Clarke <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] accurate po
Hi Ronald:
Here are a some of ideas for the heart beat for a LCD based clock like the ones
I've been developing.
Best) A Vectron EX-380 series Vacuum OCXO only draws 0.35 Watts and if the 5
volt version that's only 70 ma. So a single AA would have enough energy, three
AAA Ni-MH would be great
> To Tom:
> I will look at those products. Isn't there a problem if the
> crystals are not preaged, for the accuracies I am looking for? Since
> I am circuit impaired, besides the power supply, what other inputs are
> needed and what is the output(1 PPS, a Frequency)?
>
ay... (John Miles)
8. Re: accurate portable time source (Tom Van Baak)
--
Message: 1
Date: Fri, 28 Dec 2007 12:35:40 -0500
From: "Ronald Held" <[EMAIL PROTECTED]>
Subject: [time-nuts] accurate portable time sour
> This request is different than the last one.
> The most accurate TCXO watch is about 1 seconds/year, with regular
> wear and lots of adjustment. For at least 1 order of magnitude in
> accuracy, what can be made/bought given these initial requirements: it
> has to run of its own power supply for ~
Ronald Held wrote:
> This request is different than the last one.
> The most accurate TCXO watch is about 1 seconds/year, with regular
> wear and lots of adjustment. [...]
Really? What watch is good to 1s per year? Can you point me at one?
That's amazing for a watch.
jeff
__
> it has to run of its own power supply for ~18 hours a day, and
> recharge fully at night. the device must be intrinsically accurate
> without be disciplined by an external signal, although that could be
> done at night. The size and wei8ght need to be pocketable such a a
> large cell phone.I
Is
This request is different than the last one.
The most accurate TCXO watch is about 1 seconds/year, with regular
wear and lots of adjustment. For at least 1 order of magnitude in
accuracy, what can be made/bought given these initial requirements: it
has to run of its own power supply for ~18 hours a
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