[time-nuts] Thunderbolt temperature measuring

[David C. Partridge]

24 degrees C for the temperature doesn't sound right unless you only just
applied power - I'd expect somewhere around 45C.

Dace 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Mats Engstrom
Sent: 26 July 2009 19:14
To: time-nuts at febo.com
Subject: [time-nuts] Thunderbolt temperature measuring

Hi,

I've been lurking on this list for a long time but now it's time to unlurk.

I don't remember if it's appropriate to introduce oneself on this list, but
I'll do it anyways. :)

I've been tinkering with electronics for some thirty odd years now - mostly
just as a hobby but also occasionally semi-professionally.
Most of my stuff is microcontroller based (AVR and/or PIC) - mostly in
assembly,but C is also ok for some projects - higher level languages are for
whimps :).  I'm Swedish by birth but living and working in Dubai in the
IT/Finance industry since a couple of years.

I just bought a Thunderbolt from flyingbest at Ebay to use as a nice
timebase for my counters and signal gens.  I discovered that it had a bad
DS1620 tempsensor that always reported -55 C so I replaced it with a
thru-hole version that I happened to have some spares of. I then got a nice
24.xxxxx C temperature readout in Lady Heather. (When I tested the tbolt
without the DS1620 it reported a temperature between -0.5 to
-1.5 C)

Now I'm finally coming to the question: Since I'm using a thru-hole version
of the DS1620 and have to use cables between the chip and the circuit board
I could possibly extend the cables a bit so I can glue (with a non
termo-insulating glue) the chip onto the ocxo itself to have a tighter
coupling between them.  Would that improve the stability or is it better to
just measure the air temperature in the box?

/mats

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