Thermal control circuits could oscillate at very low frequencies there
is a tricky time constant -- the heat propagation between theater and
the temperature sensor!
73
Alex
On 12/7/2014 1:01 PM, Azelio Boriani wrote:
You can go as simple as a PTC glued on the crystal to start with.
Alternatively take a look here:
<http://www.w6pql.com/crystal_oven_controller.htm>
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