John Ackerman
Joined: 19 Jun 2006
Posts: 130
Location: Prescott, AZ
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 Posted: Thu Jan 24, 2008 7:22 pm Post subject: Coax stripping -oops |
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Oops - 2 antennae, four cables (two per antenna)
On Jan 24, 2008, at 7:57 PM, John Ackerman wrote:
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Can someone help a newbie with coax stripping?
I'm hoping I'm just too tentative (fussy), but I have a traffic
system that is exceptionally sensitive to coax antenna length.
There are 4 antennae and they all have to have RG400 length of 16
feet and all four need to be matched in length. Two of them are
routed more or less irreversibly, so one error in final assembly
could be a disaster, or at least quite expensive.
My 3-blade coax stripper (H-tools, Taiwan) is adjustable for depth
of cut but not for length of insulator exposed. It cuts RG-400 like
a charm with very little adjustment or learning required. However...
First issue: The cutter leaves 0.32" of braid exposed. That
corresponds nicely with the connector manufacturer's specs.
Pasternack Enterprises model PE4450 right angle male TNC spec is
0.300" and PE4044 straight male TNC requires 0.325". Good! The
cutter leaves 0.16" of insulation exposed. The Pasternack spec is
0.100". Not so good? There is no way to adjust that length. Could
it be that the exposed length of insulator is not terribly
critical, because Googling coax strippers doesn't show any units
that specify the lengths that they cut, or any that allow
adjustment of the exposed insulator length, although some,
including mine, seem to be adjustable for length of exposed braid?
Second issue: Fit of the center conductor into the pin. There's no
spec on this, but It seems that 6 or so individual strands need to
be clipped to let the conductor slide into the pin. Is this common?
Am I missing something about fitting the conductor into the pin?
Also, the spec for the exposed center conductor length is
0.100" (PE4044) or 0.125 (PE4450), but it appears that the pin will
accept at least 0.180". Hmmm...
Any help from the experts in this group is greatly appreciated.
John Ackerman 40458
trying to get as much done as possible before installing cabin lid.
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