[time-nuts] FE-5680A Results so far

Chuck Forsberg WA7KGX N2469R caf at omen.com
Fri Dec 30 02:21:00 EST 2011

I got twenty 10 MHz rocks from a guy in China a while ago.
It was just a few dollars for 21 pieces.  The original purpose
was to build a 10 MHz TRF receiver.

I don't think any of my legacy signal generators are stable enough to
characterize these rocks, but the 5680a should do nicely with a bit
of hacking into the rs232 port.

On 12/29/2011 03:53 PM, Chris Albertson wrote:
> On Thu, Dec 29, 2011 at 10:37 AM, Said Jackson<saidjack at aol.com>  wrote:
>> Good enough as a portable frequency counter reference, as the offset can be compensated, and the output is fairly stable...
>> These units could really use gps disciplining and a crystal post filter.
>> Great stuff for $40, new they must have been over $1000.
> I had actually thought about a crystal latice filter  I think I can
> find three 10MHz crystals and put them in series.     The trouble is
> I'm not sure what problem the filter might introduce and I don't have
> a way to measure the filter's performance
> I'm thinking of adding an RF amplifier using just one 2n5109 and an LC filter.
> Chris Albertson
> Redondo Beach, California
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Chuck Forsberg WA7KGX N2469R     caf at omen.com   www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
   Omen Technology Inc      "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430

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