Hi
HP was as much into 1 and 5 MHz as the rest of the world in the 1950's. It took
them quite a while to really decide that everything was going to be 10 MHz. I'm
sure there were some "interesting" discussions in various labs during the late
60's and well into the 70's.
Bob
On Aug 3, 2013, a
Another 5 MHz HP was the 5360A
On Fri, Aug 2, 2013 at 6:14 PM, Bob Camp wrote:
> Hi
>
> The math is pretty simple:
>
> The Q of quartz goes up as the frequency goes down.
>
> A crystal resonator's performance (Q) is limited by it's thickness to
> diameter ratio.
>
> At some point the resonator
Astronomers care.
Regards.
Max. K 4 O DS.
Email: m...@maxsmusicplace.com
Transistor site http://www.funwithtransistors.net
Vacuum tube site: http://www.funwithtubes.net
Woodworking site
http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html
Music site: http://www.maxsmusi
From the BBC: "Today presenter Evan Davis talks to author Dava Sobel
(author of the book Longitude) on the atomic clock and why time matters."
http://www.bbc.co.uk/news/world-23559189
Last 4 minutes 33 seconds (no, it's not silence, John Cage fans!). Not much
for time nuts,though.
Cheers,
From: Tim Shoppa
Very likely the Parallax PMB-648, a SirfStar III. A fair number of local
radio shack stores have Parallax and Arduino stuff on the shelves without a
Radio Shack part number.
http://www.parallax.com/go/GPS
===
If you want PPS output, and TTL/C
On 08/03/2013 02:28 PM, Bob Camp wrote:
> Hi
>
> The whole drop frequency / better Q thing really only applies if you are
> looking for ADEV with tau's > = 0.1 second. If you are after phase noise,
> then there are other things to worry about.
White noise and flicker noise of oscillator and buf
Hi
The whole drop frequency / better Q thing really only applies if you are
looking for ADEV with tau's > = 0.1 second. If you are after phase noise, then
there are other things to worry about.
Bob
On Aug 3, 2013, at 7:52 AM, Didier Juges wrote:
> Some instruments (Tek 494 for instance) us
Very likely the Parallax PMB-648, a SirfStar III. A fair number of local
radio shack stores have Parallax and Arduino stuff on the shelves without a
Radio Shack part number.
http://www.parallax.com/go/GPS
On Fri, Aug 2, 2013 at 5:34 PM, J. Forster wrote:
> In looking around the local Radio Sha
Some instruments (Tek 494 for instance) use a 100 MHz VCXO phase locked to 10
MHz for lower phase noise when multiplied into the microwave bands,
demonstrating that there is more than one way to skin a cat.
Didier KO4BB
Bob Camp wrote:
>Hi
>
>The math is pretty simple:
>
>The Q of quartz goes
