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(ii)
Announce Booth Speaker Relay And Power Supply.
See Figure 14 "Announce Booth Operation" on
page 19
.
The MI -11703 Relay is complete with capacitor and resistors.
A Type 79-A Power
Supply may be used.
(I)
76-B2 Power Supply.
The MI -11301-A Power Supply Unit.
See Section 1
-
"Technical Data".
(J)
Conduit Terminating Box.
See Figure 7
"Installation Diagram" on page 14
.
In many cases the
conduit terminating box is fabricated by the electrician, or made up on special order.
In
such cases, the mounting flanges may be turned outward,
instead of
inside, as shown by
Figure
7
.
(K)
6 DB Pad For Telephone Line.
See Figure 3 on this page.
This 600 -600 -ohm pad is placed
between the output of the Type 76-B2 Consolette and line jacks in order to permit the Type
76-B2 Consolette to operate into a constant impedance at all times.
The resistors comprising this pad may be ordered as follows:
100 -Ohm Resistor, Stock 430540,
(4 required)
400 -Ohm Resistor, Stock 030498,
(2 required)
When this 6 db pad is inserted in the telephone line the V.I. Meter will read the output
of the Type 76-B2 Consolette to the pad and not the program level to the line.
In order to
read the actual program line level
it will be necessary to subtract 6 db for the loss in the
pad.
This may be done by changing the connections to the V. I.
attenuator as shown in Fig-
ure 9
page 15
.
(L)
Type 9-AJI Rack Or N1-11500 Wall Box.
See Figure 11 "Typical Station Conduit
Layout".
The line jacks, line equali-
zers, and 6 db telephone line pad may
be mounted in an MI -11500 Wall
Box, or
on a Type 9-AJX Rack if more space is
required than provided on the MI -11500
Wall Box.
The MI -11500 Wall Box will
accommodate up to 4
MI -4645 (Type
33-A) or 6 MI -4646 (Type 33-B) Jack
Panels and
1
MI -4162 Type 56-E Line
Equalizer.
(m)
Radiotrons.
The types and number of
each required are listed under
section 1 "Technical Data" on page 5
.
(N)
Wall A Floor Outlets, For Microphones,
Signal Lamps, Loudspeakers, And Turn-
tables.
Refer to Figure 11 "Typical
Conduit Layout" on page 16
.
The out-
lets and boxes recommended are listed
in Figure 11.
10011 RESISTOR ,STOCK
40011 RESISTOR STOCK *30498.
TO 60011
LINE OUT
OF 76-B2
10011
TO
soon
TEL. LINE
MI -11613-A
K-I 81563-1
FIGURE 3
-
6 DB FOR TELEPHONE LINE.
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