We're testing a proto board. I'm temperature compensating a 50 MHz LC oscillator.
The beer cooler is a great benchtop temperature chamber, for about $35. I didn't have a frequency counter here, so I bought that one from Amazon for $70.
The beer thing heats and cools at about 1.5 deg c per minute, so a temp sweep leaves time to do other things. Kinda like Spice.
The setup really needs the fan inside the cooler.
The window is cool. I can see the LEDs blinking.
John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics