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Critical Type-N Mechanical Characteristics
• Minimum protrusion of the female center conductor in front of the
• Maximum protrusion of the female center conductor in front of the
• Minimum recession of the shoulder of the male contact pin behind
• Maximum recession of the shoulder of the male contact pin behind
In the HP precision specification for type-N connectors, the minimum
allowable recession for the male contact pin shoulder is 0.001 inches
less than in the MIL-C-39012, Class II specification. Hewlett-Packard
type-N pin depth gauges set "zero" on the gauge to be equal to a
nominal 5.258 mm (0.207 inches) offset.
As type-N connectors wear, the protrusion of the female contact-fingers
generally increases. This is due to the wear of the outer conductor
mating plane inside the female connector. It is necessary to check this
periodically as it decreases the total center conductor contact
separation.
Never use a type-N connector if the possibility of interference between
CAUTION
the shoulder of the male contact pin and the tip of the female contact
fingers exists.
If you use both 75 Ω and 50 Ω type-N connectors, mark the 75 Ω
connectors so that they are never accidentally mated with 50 Ω
connectors. The diameter of the center conductor, male contact pin, and
female contact hole are smaller on 75 Ω connectors.
Irreparable damage will occur if a male 50 Ω type-N connector is mated
to a female 75 Ω type-N connector.
Chapter 2
outer conductor mating plane is 5.182 mm or 0.204 inches.
outer conductor mating plane is 5.258 mm or 0.207 inches.
the outer conductor mating plane is 5.258 mm to 0.207 inches.
the outer conductor mating plane is 5.334 mm or 0.210 inches.
Specifications and Characteristics
Mechanical Characteristics
2-7
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