[time-nuts] FEI-5660 Rubidium Oscillator
Jim Lux
jimlux at earthlink.net
Fri Mar 28 01:55:17 UTC 2014
On 3/27/14 4:10 PM, Tom Van Baak wrote:
>> Recently I happened across an eBay listing for an Antelope Audio
>> Isochrome, a device that apparently packages an SRI-PRS10 rubidium
>> oscillator and distribution amplifier in a box and sells to
>> audiophiles for a price in the
>
> True, the PRS10 is a better choice than other cheap telecom
> rubidium's but none of these comes close to the performance of a
> premium OCXO. For the ultimate audio reference clock you want to
> avoid Rb, or GPSDO, or Cs for that matter. Instead pick a 1e-12 or
> 1e-13 stable OCXO, strap it to a 100 pound block of granite, and
> leave it alone.
>
A precision machined, finely crafted 100 pound block of granite (which
isn't all that big.. 1/3 cubic foot or so?) selected from the most
acoustically perfect granite by trained audiogranite craftsmen. The
relative ratios of feldspar, hornblende and quartz are chosen for each
installation according to the type of music and the vital harmonics of
the listener. If two different people will be listening (obviously not
at the same time, because only one can be at the perfect point between
the loudspeakers), you need a mixture of granites.
More seriously, I'm assuming you're advocating rock for the thermal mass
and/or mechanical. What about a 100 pound box of sand?
More information about the Time-nuts_lists.febo.com
mailing list