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Hi Bruce,
With a quick search of the NIST site, I couldn't find any
mention of this, and the circuit diagram in your GIF was a little
small and fuzzy: is that a crystal on the centre-tap of the secondary
of the first
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UK Government discussions on the subject...
http://www.theregister.co.uk/2007/07/05/galileo_commons_debate/
Rob Kimberley
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time-nuts mailing list -- time-nuts@febo.com
To
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Peter Vince wrote:
Hi Bruce,
With a quick search of the NIST site, I couldn't find any
mention of this, and the circuit diagram in your GIF was a little
small and fuzzy: is that a crystal on the centre-tap of the
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In a message dated 7/9/2007 01:59:46 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
It just an RF bypass capacitor to ground.
This circuit was embedded in a very small section of a much larger
paper, so its difficult to
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Where does one find this circuit ?
Thanks, Dick, W1KSZ
[EMAIL PROTECTED] wrote:
In a message dated 7/9/2007 01:59:46 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
It just an RF bypass capacitor to ground.
This
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From: Dick, W1KSZ [EMAIL PROTECTED]
Subject: Re: [time-nuts] NIST frequency doubler
Date: Mon, 09 Jul 2007 19:42:23 -0400
Message-ID: [EMAIL PROTECTED]
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Where does
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[EMAIL PROTECTED] wrote:
Hi Bruce,
nice circuit. Many questions:
I wonder how well it works to get a 5MHz source up to 10MHz?
Also, would you have recommendations on the transformer part numbers?
(MiniCircuits,
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In a message dated 7/9/2007 17:20:56 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
The best turns ratio for the input transformer is best determined by a
combination of simulation and testing to achieve the desired JFET
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In a message dated 7/9/2007 18:34:30 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
Since JFETS have a relatively large spread in characteristics individual
adjustments are required.
Bruce
Thanks again Bruce,
I am not
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Said
To give some idea of the transformer ratios required a simulation using
pSpice shows that:
When using 2 x 2N4393's connected in parallel (limited choice of JFETs
available) for each JFET in the NIST circuit, an input
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I have an Austron 1150 crystal oscillator which I plan to put on ebay.
I like to offer fellow Time Nuts a chance at it before its listed.
Unit is operational, its model number 1150, serial number 1705, 5 Mhz,
input power is 12-28
[EMAIL PROTECTED] wrote
Thanks for the info Bruce, Magnus,
I will be reading the Felton paper to get more info.
With a bit of trickery, I bet this circuit can be used with Bipolar
transistors.
bye,
Said
Said
You mean like the circuit in the attached file?
Input transformer
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[EMAIL PROTECTED] wrote:
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In a message dated 7/9/2007 18:34:30 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
Since JFETS have a relatively large spread
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