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#1
March 13th 07, 08:16 PM
posted to rec.radio.amateur.homebrew,sci.electronics.basics,sci.electronics.design
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VCXO frequency isn't high enough
Try going smaller than 10 pF (you can put a 10 pF fixed capacitor in series
with the trimmer). |
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#2
March 14th 07, 09:58 AM
posted to rec.radio.amateur.homebrew,sci.electronics.basics,sci.electronics.design
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VCXO frequency isn't high enough
Charles Schuler wrote:
Try going smaller than 10 pF (you can put a 10 pF fixed capacitor in series with the trimmer). I did this and it will go slightly higher in frequency, but it gets a tad unstable (could be the counter too, I wish my new scope would get here). I guess I'm at the limits of that particular crystal. |
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#3
March 14th 07, 09:38 PM
posted to rec.radio.amateur.homebrew,sci.electronics.basics,sci.electronics.design
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VCXO frequency isn't high enough
On Wed, 14 Mar 2007 04:58:52 -0500, Anthony Fremont wrote:
I guess I'm at the limits of that particular crystal. I think you are getting close to the limits :-) You might get a few Hz more by reducing the value of the 2 100pF capacitors. Try another crystal or a ceramic resonator. 73, Ed. EI9GQ. -- Linux 2.6.18 Remove 'X' to reply by E-Mail |
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