Before revision: In manufacturers' specifications for electronic devices, a bogey device (or bogie device) - especially a bogey tube- is one that has all characteristics equal to the published values, in other words that its parameters all lie in the centre of their bell curve distributions.
After revision: In manufacturers' specifications for electronic devices, a vacuum device (or bogie device) - especially a bogey tube- is one that has all characteristics equal to the published values, in other words that its parameters all lie in the centre of their bell curve distributions.