After some scratching of my head, and chatting to DeuceEFI on IRC, I realised that I had
simply been ignorant and ignored a crucial but unimportant-looking part of the schematic.




In the process my thermocouple wire got shortened a significant amount :-)
But, it was time for another test!


This was the noisy test that I posted earlier, but largely a success.
The thermocouple wire insulation showed signs of being plenty hot.

And the noise meant that I thought I'd follow the schematic even more closely and add some filtering.


Plus, the expansion forced the door partly open from about 200C up, so I fixed that too.


It must be time to control it! :-)

I don't have the rest of the pics handy right now, but I'll try to find them and do another post soon.
To be continued.... but not today! :-)
Fred.
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