Abstract: A venting mechanism which includes three members. A first member having threads defined thereon connected to a second offering a hexagonally shaped external surface. The third member features a bore which defines an annular surface at the intersection with a bore through the second member. A baffle is located within the bore of the second member by engagement with the annular surface defined between the second and third member. A Gortex film and a wire mesh placed within the bore of the third member are retained by a rolled lip thereof. In this manner, the baffle and the Gortex film act to maintain liquid on one side of the breather while allowing gases to freely pass therethrough.

Abstract: A method and apparatus comprising a sampler frequency converter having a first and a second diode. A local oscillator having a frequency F.sub.LO, a step recovery diode and a balun transformer are used for providing positive and negative sampling pulses to the diodes for sampling an input signal applied to the diodes having a frequency F.sub.IN. An output signal is provided by the diodes having a frequency F.sub.OUT which is defined by the relationship F.sub.OUT .vertline.F.sub.IN .+-.N.times.F.sub.LO .vertline. where N is an integer harmonic number 1, 2, 3 . . . and the output signal has an amplitude which varies as a function of (sin x)/x where x=F.sub.IN. A bandpass filter is provided which is responsive to the output signal for filtering a predetermined band of frequencies therefrom and a bias circuit is provided for forward biasing the diodes so that the frequency F.sub.