[time-nuts] Double ovened 10811-60158 on ebay
namichie at gmail.com
Sun Jul 20 00:09:59 EDT 2008
surely an oven that controls to 1*C limits the inner xtal oven from
the outside 0 - 50*C,
so with a finite gain on the inner oven the oven the XTAL is
controlled 50 times as well?
Thats why they use double ovens.
cheers, Neville Michie
On 20/07/2008, at 1:40 PM, Rick Karlquist wrote:
> Ed Palmer wrote:
>> I picked up a couple of these 'naked' oscillators. I was
>> surprised to
>> hear that you stripped yours down. I'm planning to build it back
>> up to
>> its former glory with a controller for the outer oven and a new
>> cover of
>> some sort. Is there any reason not to do that?
> The possible reason is that the oven thermal gain isn't all that
> great (AFAIK), so you go to fair amount of trouble for marginal
> benefits. You will probably have to use a very long time constant
> which will sort of rule out a simple analog integrator, forcing
> a PID digital controller. If you're good with a PIC, it might not
> be too hard. I'm an analog guy; I don't speak PIC. :-)
> Rick Karlquist N6RK
>>> Date: Sat, 19 Jul 2008 17:33:07 -0400
>>> From: wje <wje at quackers.net>
>>> Subject: Re: [time-nuts] Double ovened 10811-60158 on ebay
>>> To: Discussion of precise time and frequency measurement
>>> <time-nuts at febo.com>
>>> Message-ID: <48825D93.2060101 at quackers.net>
>>> Content-Type: text/plain; charset="ISO-8859-1"
>>> I got one without the outer cover, which isn't quite as useful. I
>>> removed all the junk to get down to the orginal non-double-ovened
>>> One thing I noticed - I wonder where these were actually
>>> 10811B itself has a fair amount of corrosion on it, lots of
>>> still works fine, though.
>>> Another thing, the 10811B in mine doesn't have a removable
>>> it's soldered. This makes it a lot more difficult to adjust or
>>> Still, I think it's a fine buy for the cost. Now all I have to
>>> do is
>>> figure out what I really want to do with it. :)
>>> Bill Ezell
>>> They said 'Windows or better'
>>> so I used Linux
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