Issue 2, 2009
Connector Corner:
N connectors and pin issues
Ever had an N connector appear to short out when the cable was moved? This could be a pin placement issue. As shown on the right with a cutaway connector, the back shoulder of the pin, if not properly located may touch the connector body leading to a short. A quick check with a pin depth gauge can identify this issue.
N type connectors can be gauged for the distance from the shoulder of the pin or socket to the reference plane. For N plugs used in non precision applications this measurement is between 0.210" and 0.230" (5.33 mm to 5.84 mm). For jacks the dimensions are 0.187" to 0.207" (4.75 mm to 5.25 mm).
A tip for fitting connectors to RG58 cable:
The 834 RULE:
8 mm of exposed jacket/ 3 mm of exposed dielectric/ 4 mm of exposed centre conductor
You can use a Cortex® stripping tool to ensure you get this the same every time. RFI’s Part No. CST-399.
Remember, the back of the pin must butt against the dielectric before crimping. Then gently push the cable into the connector- there is a definite "click" when the connector is properly placed. Now slide the crimp sleeve over the braid and crimp.
Note the 834 rule also applies to RG400/223/142/59/302.
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