I have an HP 905A sliding load which is complete with all of the
interchangeable pins and bodies for male/female N and APC7, but
there's a warning about never mating the connector pins with a
Precision-N male.? Is there a spec like MIL-C-39012C for Precision
N? That spec has the standard dimensions for checking pin offset,
and runout, but the most recent 1994 version doesn't mention
Precision-N.?? Is that MIL-C spec the canonical spec for N
connectors, or is there a higher authority that defines the
tolerance and dimensions and includes the Precision-N specs?
The manual says I can use IPA to clean the connector bodies
(which have the usual greenish decomposed foam guck on them) but
nothing like Acetone or other solvents. I'm wondering if a gentle
thrash in a warm ultrasonic bath of distilled water and surfactant
then an IPA rinse might be acceptable?? I can't get the guck off
with IPA alone.? Can anyone see why using volatile organic
solvents on the purely metal parts would be a problem? The
airline, load and main body are free of contaminants.? the lock
and slider works fine.
I'm laser-cutting a replacement EVA insert for the box.? I hope
it won't turn to goo and powder in my remaining lifetime.
Last question, the spec says the gap between the shoulder of the
N mail pin and the face of the female socket should be 0.001" to
0.007" but the 905A manual suggests pressing the plunger until the
pin stops moving, then locking it.? That doesn't feel at all
sensible to me.? I'd prefer to push it gently in, then back it off
by a tiny amount in case there's any differential thermal
expansion/contraction that might cause excess pressure on the
socket/pin.
