[time-nuts] Re: High precision OCXO supplier for end costomers

[Tim S]

I have had some good success working with Connor-Winfield for short run,
tighter spec parts as a private individual under the sales column of
"samples".  Just tell them what you want to do, and be upfront about your
actual quantities, and don't be in a rush - it's not good Karma leading a
sales person on with the idea of a big future sale only to tell them you're
done with the handful you already have.  It wastes their time and energy.
I told CW I'd take what I could get to build the parts, not rejecting scrap
crystal rather than demanding virgin before they started and told them that
I could wait until they had time in their process rather than forcing it
through.

Nothing with a dual frequency output from a monolithic component, but for
the application (a custom board for an RPi CM4 with coaxial S/PDIF audio
out) I GPS disciplined the audio master clock (24.567MHz), and then align
the system clocks to that oscillator so that the PLLs  stay within 1/3U and
don't have to resync in the MCU or other bus components (54MHz for core
clock, 25MHz for network clock), and as a result buffers never filled up or
ran dry.  My AP2722 has about an equivalent clock quality (little better,
but tired), so I am in a place where some of the digital artifacts measured
are going to be a fight between the noise floor of the test device and the
test equipment.

-TS

On Mon, Jan 10, 2022 at 12:54 PM <time-nuts-request at lists.febo.com> wrote:

> Date: Mon, 10 Jan 2022 08:26:26 +0000 (UTC)
> From: Norman Reitz <norman_reitz at yahoo.de>
> Subject: [time-nuts] High precision OCXO supplier for end  costomers
> To:     Discussion of Precise Time and Frequency Measurement
>         <time-nuts at lists.febo.com>
> Message-ID: <1329853732.5157697.1641803186654 at mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
>
> Hi, everyone,
> I am looking for suppliers of high-quality OCXO in 10 Mhz (sine / square)
> and 25 Mhz sine wave output. I can only find changes below my quality
> requirements for phase noise at Mouser or Digikey. E.g. a 10Mhz should be
> better than -120dbc @ 1Hz (-140dbc @ 10Hz) - a 25mHz better than -115
> dbc at 10Hz.I want to use them in high quality audio application.
> Unfortunately, the minimum order quantities of the providers that I have
> found are not available for private customers - or you only sell with proof
> of use or a trade license. Since i dont want to start a business in space
> or defence-business, this is a problem for me. Do you have a tip or contact
> person who also does business with non-lucrative end customers? I am
> already aware that the quality of OCXO cannot be obtained for 100 bucks.
> best regards
> Norman
>