Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread Peter Vince
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] 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

[time-nuts] Galileo latest

2007-07-09 Thread Rob Kimberley
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] UK Government discussions on the subject... http://www.theregister.co.uk/2007/07/05/galileo_commons_debate/ Rob Kimberley ___ time-nuts mailing list -- time-nuts@febo.com To

Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread Dr Bruce Griffiths
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] 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

Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread SAIDJACK
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] 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

Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread Dick, W1KSZ
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] 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

Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread Magnus Danielson
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] 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] ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Where does

Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread Dr Bruce Griffiths
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] [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,

Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread SAIDJACK
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] 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

Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread SAIDJACK
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] 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

Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread Dr Bruce Griffiths
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] 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

[time-nuts] Austron 1150 Crystal Oscillator

2007-07-09 Thread Brian Kirby
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] 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

Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread Dr Bruce Griffiths
[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

Re: [time-nuts] NIST frequency doubler

2007-07-09 Thread Dr Bruce Griffiths
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] In a message dated 7/9/2007 18:34:30 Pacific Daylight Time, [EMAIL PROTECTED] writes: Since JFETS have a relatively large spread