Thanks for the explanation. Having thermal element (say, resistors) spread as a regular grid all over the backside of the PCB would help with reducing the gradient.
It makes me wonder if it would make sense to have a slow rotating fan inside the box. Not to get rid of excess heat but to compress the gradient against the well-insulated wall of the box. It's probably overkill for most cases, since there are other factor that influence frequency stability...
It makes me wonder if it would make sense to have a slow rotating fan inside the box. Not to get rid of excess heat but to compress the gradient against the well-insulated wall of the box. It's probably overkill for most cases, since there are other factor that influence frequency stability...