Hi
Regardless of it being a double or single oven, it’s a good bet that it did
once and still
does meet the original temperature specification with some margin. The open
question
is - what was that spec?
Bob
> On Feb 3, 2020, at 3:58 PM, gandalfg8--- via time-nuts
> wrote:
>
> Ah,
> I now
On 2/3/2020 12:58 PM, gandalfg8--- via time-nuts wrote:
I'm not in anyway trying to detract from the 8663, or from its performance, but
until someone is brave enough to attack one with a hacksaw and prove otherwise,
I still have the one that, until the EFC circuit in it became flaky,
Ah,
I now have a full copy of the design paper, "A new kind of view for a Double
oven Crystal Oscillator", thanks John.
The authors do reference the 8663 but as far as I can see only in a
photographic example of what was previously available, before then launching
into the discussion of their
I've been using 8663's for years. I've put many of them in freq counters.
Their phase noise is fairly good, but not stellar. Their temperature
stability is more than excellent. Aging drift tends to be far better than
spec. As with all things OCXO, YMMV
Hi
The bigger issue is: Was the “ST” version done as a low cost approach that just
happened to be in the 8663 footprint? If so, the only way to know what it does
/
what it is would be to find the elusive spec sheet.
Bob
> On Feb 2, 2020, at 5:47 PM, Magnus Danielson wrote:
>
> Hi Nigel,
>
Hi Nigel,
I was about to make a similar comment. The 8663 is for sure limited by
it's size. Actually, for being Oscilloquartz they are by far not the
best or the worst, but kind of mid-range. I have OSA 8712 here, and the
even smaller one. Then there is the OSA 8666/8667 and well, I guess the
OSA
I don't have access to the full copy of the quoted reference, so don't know
whether or not specific part numbers are quoted, but did note from the abstract
the comment.
"To allow the assembly on a board of 4TE width, the height of the OCXO is
limited to 19 mm"
This I would suggest could
Hi
The HP10811 is a single oven. It has been around for a *long* time.
It is spec’d to do 2.5 ppb over 0 to 70C. Indeed they typically exceed
this spec. HP was a bit conservative on their numbers.
Several versions of the 8663 are not spec’d as tightly over temperature
as the 10811. The main
Some Chinese sellers have been describing the 8663-XS as double ovened for
years now, certainly as far back as 2013 when I bought a couple.However, this
is not confirmed by the Oscilloquartz data sheet and I have always believed it
to either be wishful thinking or just a marketing ploy.The
On Sat, 1 Feb 2020 21:08:42 -0500
Bob kb8tq wrote:
> are representative, the 8663’s don’t quite get to that level. The typical
> spec unit is at 1 to 4 ppb over 0 to 70. That’s
> reasonable performance for a modern single oven. I very much doubt they
> built a true double oven simply to hit
>
Hi Jeffrey,
On 2020-02-02 01:50, Jeffrey Pawlan wrote:
> I along with many others have purchased a couple of the OSCILLOQUARTZ
> 8663-XS 10MHz oscillator. The ebay ad claims it is double oven but
> the only datatsheet I could find is for a generic 8663. Does anyone
> know the actual definition
Hi
Backing off a bit:
The 10811 in your Z3801 has an outer heater to allow it to operate at -40C. The
“stock” 10811 will run out of
oven power before it gets that cold. The outer oven does nothing other than
allowing operation at very cold
temperatures. It cuts out (or should do so) before the
I along with many others have purchased a couple of the OSCILLOQUARTZ
8663-XS 10MHz oscillator. The ebay ad claims it is double oven but the
only datatsheet I could find is for a generic 8663. Does anyone know
the actual definition of the XS version?
It is unclear whether the ones we are
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