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2 Section
Porogroph I h (2)
jumpers. All cables should be fabricated on the bench
as shown in figure 2-B before installation in the Cabinet.
Ferrules Navy Typ" -f0670, which are not supplied
by the contractor, are required for fabrication
Figure 2-9. Type A, Close-Up View of
Wiring With Connector-Adqpters Novy
491652 lnstqlled in Cobinef
2-10
NAVSHIPS 9rO47
RESTRICTED
INSTAt[ATlf,]hi AND
of the RF cables to bond the outer'rraid ' T::*
interference.
In connecting the RG-f2 /V cable to ute Connt,...f r)i-
Adapters Naq, Type CIA-49I652 conncct them so that
the circuits will ,un in some logical order. For example,
if the antennac of the station are nnmbr red,
the # I antenna should connect to the left hand Jack
Box (when viewed from the front) and the #L position
of the Antenna Selector Switch.
(3) AF wIRING.-All AF wirin,,r is fabricatec
frorn twisted, shielded pairs obtained by stripping the
ottter plastic from TTRS series cable or similar twisted,
shielded pairs. Wiring when completed will look like
that shown in figure 2-L0. Connections are similar to
that shown on the connection diagrarn figure 2-40.
When making up the required internal AF wiring,
bear in mind that sufficient slack must be left in the
wiring to allow the panels to be pulled out through
the front without disturbing the wiring. Note the "lJ"
shape of the laced cable in figure 2-10 which is for this
purpose. This requirement must be kept in mind
when placing the clamps. The entire cable is painted
with fungacide varnish as stated in par agraph 2, b (8)
of section three. The installing activity mtrst furnish
the necessary fungacide varnish.
(q,) AF JACK PANELS.-As shown on the
wiring convention (figure 2-21) the upper and lower
pairs of jacks on the Jack Strip are wired in parallel
and in such a fashion that plugging horizontally into
the top pair breaks the normal circuit; while plugging
horizontally into the bottom pair establishes a parallel
connection.
To accomplish this connection, a piece of #20 AWG
bus wire is soldered from the tip connection of the
top bank to the tip connection of the lower bank as
shown in figure 2-13. In the Signal Distribution Unit,
only !h" tip connection of the patchcord is utilized.
but the body is connected and can be used if required.
Each pair splits between two horizontally adjacent
jacks. The ends of the twisted pairs are fitted with
Thomas and Betts Grounding Ferrules #200-30006 as
shown in figur"e 2-15 to prevernt fraying of the braid.
The shield is not grr.uncled on the jacl Yip end., but
it is grounded on the terminal boa ! .?o(r. Thtrs, the
grounditrg braid and the spade lu5; ;llrrstrated in
figtrre 2-I5 are omittecl in wiring the fa.r:i,. :trips. Skin
off the plastic coating on the conductors frir :.bout L / 4"
and slip a piece of #9 radio qrade spaghetti about I"
long on each of the conductors. Insert the bare ..crrductors
through the appropriate holes, Cotrble l)ac, .,
and so]der in place. Establish some stlrt "f i:o!')r
code to make it easier to visually trace a : r'tic' "-u'
cable. If TTRS-4 cable is used, the r' ;ht ' ',-;d p,rir
RF Cqbinei
Type CIA-
of jacks should be black, the second F,air
third pair red, and the fourth pair greei, I ', :tlyisi,riilt";iNAt