[sdiy] (no subject)

Tim Ressel timr at circuitabbey.com
Thu Apr 4 21:08:03 CEST 2019


These days Peltier coolers work okay for this. And of course a tube 
amplifier makes a great controllable heater ;-)

--TimR

On 4/4/2019 11:44 AM, Ben Bradley wrote:
> I saw one of those chambers 20 years ago, and thought that all you
> need is an old microwave oven (remove the microwave heating parts) and
> add some resistance heating and temperature control, maybe a fan for
> circulation to keep an even temperature...
> Oh my, I just googled this:
> diy temperature chamber
>
>
> On Wed, Mar 27, 2019 at 2:37 AM Tim Ressel <timr at circuitabbey.com> wrote:
>> I still prefer the heater method of temperature stabilization, a la
>> AN299. Makes it all just go away. Then you just have to use tight
>> tolerance low tempco resistors on the input. Maybe someday I'll finish
>> that DIY environmental chamber and make some measurements.
>>
>> --Tim (gettin' around to it, honest) Ressel
>>
>> On 3/26/2019 9:17 PM, Michael E Caloroso wrote:
>>> Not sure this was already posted, but this is an excellent article
>>> (technical descriptions including the math) on temperature
>>> compensation techniques used in exponential converters for VCO.
>>>
>>> http://www.openmusiclabs.com/2015/03/temperature-compensation-of-analog-exponential-converters/trackback/index.html
>>>
>>> MC
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at synth-diy.org
>>> http://synth-diy.org/mailman/listinfo/synth-diy
>>>
>> --
>> --Tim Ressel
>> Circuit Abbey
>> timr at circuitabbey.com
>>
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-- 
--Tim Ressel
Circuit Abbey
timr at circuitabbey.com



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