Small Oven, for 2x LT1236, (Python Reference) No1

[daqq]

Very nice! Impressive that you got such a small reaction to outside temperature.

Perhaps it is even possible to create 2 planes on either side and connect them through some via's and use that is a heater?

Using PCBs as heaters is done (seen it in 3D printers), but the problem is that they have very low resistances - as such you need a low voltage with a lot of current.

Stupid question: Why not add the styrofoam insulation inside the metal enclosure? If one wants to have more "thermal mass", just place a smaller metal enclosure inside the insulated enclosure?

I'd say it would be better to put the metal enclosure into an insolation - that way you get a good thermal connection to the heated device and a lousy thermal connection to the outside.

[Alex Nikitin]

together with a A=2 LTC2057 amplifier with LT5400 as gain setting resistor. Sure, longterm stability would be worse the frist 2000h, but after it has aged, well...

You can get a pretty decent x2 precision amplifier using one INA133 inside the enclosure.

Cheers

Alex

[Kalvin]

Stupid question: Why not add the styrofoam insulation inside the metal enclosure? If one wants to have more "thermal mass", just place a smaller metal enclosure inside the insulated enclosure?

I'd say it would be better to put the metal enclosure into an insolation - that way you get a good thermal connection to the heated device and a lousy thermal connection to the outside.

Total brainfart from my side I thought placing the heating transistors with a heat sink inside the insulated metallic enclosure would give some benefit. Like you said, insulating the heated enclosure is the Solution.

[branadic]

Any news or results on that experiment?

-branadic-

[branadic]

I finally managed to power up LT1236LS8 assembled on a PI flex pcb, attached with a thermal adhesive pad to a QH40A crystal heater. The assembly is insulated and inside a glass flask. I still have a bunch of those flex boards left, so if someone is interested in let me know. Can ship them via a letter if you pay for the shipment.

-branadic-