[time-nuts] Inside a CTS 1960017 OCXO
rob at nc0b.com
Sat Feb 27 19:30:42 EST 2016
The part draws 600 mA during warm-up, and drops to around 230 to 200 mA when stabilized.
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob Camp
Sent: Saturday, February 27, 2016 2:26 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Inside a CTS 1960017 OCXO
A small air gap is actually a better insulator than conventional foam. You don’t get much of a convection cell going at those spacings. The part likely pulls a bit over a watt at room.
If you put an insulator on the gizmo you increase it’s thermal gain. That will most likely make the temperature performance significantly worse. See the good old papers on the HP super ovens for all the details.
> On Feb 27, 2016, at 12:44 PM, Tom Miller <tmiller11147 at verizon.net> wrote:
> ----- Original Message ----- From: "Daniel Watson"
> <watsondaniel3 at gmail.com>
> To: <time-nuts at febo.com>
> Sent: Saturday, February 27, 2016 11:48 AM
> Subject: [time-nuts] Inside a CTS 1960017 OCXO
>> I'm sure many of you are tracking the cheap CTS 10MHz OCXOs available
>> on eBay right now. I purchased a case of them, and decided to crack one open.
>> I took pictures along the way, thinking that might be interesting to
>> the list. Here is the blog post if you are interested:
>> Comments on the internal construction of the OCXO are welcome. It
>> seems pretty straightforward inside though.
>> Best regards,
>> Dan W.
> Looks like it would use a lot of power in a cold environment. Maybe a second oven would be nice. They seem to have marked the turnover temp on the xtal.
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