Switch heater test with MA09

Results:

• Without lamda stage (coil at 4.2 K), a heater power of 0.81 W (13 V, 63 mA) is needed for switching.
• With lamda stage (coil at 2.3 K), a heater power of 1.06 W (14.7 V, 72 mA) is needed for switching.
• The maximum switch heater power (205 Ohm switch heater) is 1.41 W (17 V x 83 mA).
• With the coil at 2.3 K it takes about 5 seconds from starting the heater at maximum power (1.41 W) until the switch goes off (therefore the usual 30 sec. delay is very conservative).