Re: [time-nuts] time-nuts Digest, Vol 146, Issue 13

[Christopher Hoover]

>
>
> Message: 2
> Date: Mon, 5 Sep 2016 19:48:14 -0700
> From: "Richard (Rick) Karlquist" 
> To: Discussion of precise time and frequency measurement
> 
> Subject: [time-nuts] Hobbyist grade or homebrew temperature testing
> chamber?
> Message-ID: <4fb2f3cd-7509-4873-b21f-300161d0b...@karlquist.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> As we all know, step #1 in making a clock is NOT
> to build a thermometer :-)
>
> I thought I would check the brain trust here to see
> if anyone has seen a hobbyist grade temperature
> testing chamber or kit or homebrew design.  I
> have some crystals, oscillators, and other
> electronics I would like to characterize over
> temperature.  I know this reflector has discussed
> homebrew stabilization ovens; however, they
> have tended to have very long time constants
> (which makes sense for that application).  I
> need to be able to change temperature in a
> reasonable amount of time, and I don't need
> extreme stability.  Looking for any ideas,
> maybe in the "maker" spirit.  I think the
> size I need would be perhaps 1/2 the size
> of a shoebox.
>
> BTW, in case someone has a chamber to sell,
> let me know...
>
> Rick Karlquist N6RK
>
>
>
If you need a heater strip,  I am a satisfied and repeat customer of Minco.
  They make polyimide resistive heating elements that can put a lot of Q
into something.

http://www.minco.com/Products/Heat

design guide:

http://www.minco.com/components/~/media/WWW/Resource%20Library/Heaters/Heater%20Design%20Guide.ashx?la=en

-- christopher
73 de AI6KG
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Re: [time-nuts] time-nuts Digest, Vol 146, Issue 13

[Dan Kemppainen]

This may help.

http://www.auberins.com/index.php?main_page=index=1
Look at: SYL-1512A  (Or any of the others, really...)

If you want to lock a temp down and use a light bulb or similar, this is 
a pretty cheap way to go. I've used them for large soldering irons, 
reptile incubators, and temp chambers. They work great if you need to 
hold temp long to stabilize everything before a measurement. Very nice 
units for the price.


I'm sure you know this, but watch your temp gradients in the chamber.

Dan






As we all know, step #1 in making a clock is NOT
to build a thermometer:-)

I thought I would check the brain trust here to see
if anyone has seen a hobbyist grade temperature
testing chamber or kit or homebrew design.  I
have some crystals, oscillators, and other
electronics I would like to characterize over
temperature.  I know this reflector has discussed
homebrew stabilization ovens; however, they
have tended to have very long time constants
(which makes sense for that application).  I
need to be able to change temperature in a
reasonable amount of time, and I don't need
extreme stability.  Looking for any ideas,
maybe in the "maker" spirit.  I think the
size I need would be perhaps 1/2 the size
of a shoebox.

BTW, in case someone has a chamber to sell,
let me know...

Rick Karlquist N6RK

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