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The remote input 1 ines and the auxiliary stereo input to chanr181
10 are 600 ohm balanc8d circuits.
The impe;danc8 can be changed
by changing taps on Tl, T9, and ']'10, the matching transform",r in
thes0 channo1s.
riS
connectod, to 1 and 3, the impedance is 600
ohms.
Connect to land 2 for 150/200 ohms and to 2 and 3 for
30/50 ohms.
~rhe
net input to chann01 9 is 600 ohms and no match",
ing transformer is included in this channel.
If othor i.mp",dancus
are desired an external transformer must be used.
INSTALLATION ___ ,!IHINQ
PO'JER CONlBC'T'TONS
A 117 VAC ci.rcui
t
should be connect0d tc terminals 1 and 3 on
the power transformer.
'[,erminals 1 and 2 should be; used if
local AC line voltage is low (105,-110 V.) and t0rmi.nals 1 and 4
should be used where the AC voltage is hi.gh (120 to 125 V.).
The three 28 Vo secondary windings of the powGr transformer,
terminals 5 and 6, 7 and 8, 9 and 10 should be connected to
terminal block 8, terminals land 2, 3 and
Lj,
5 and 6.
117 VAC for the warning li.ghts should be connected to terminals
1 and 2 of terminal block 7.
Studio A warning lights connect
to terminals 3 and 4 of terminal block 7.
117 vAC will appe3.r
at these terminals when channel one Lever mii tch is placed in
program or audition posi
liiODS.
T,i.ghts conn0cted to theSE' t8l"-
mina1s should, therGfore, be i.n tho same studio as microphonos
connected to channel 1 i.nputs.
Studi.o B w'lrning lights should
be conn8cted to terminals 5 and 6.
Those li.ghts wi11 be on
"lhen channel 2 lever sl'J"itch is in program or audition positi.on
and should be in the same studio as microphones conn8cted to
chanrlel 2 inputs.
Control room 1rrarning lights, ac ti vated by
lev6r switch:;' should bG connocted to terminals 7 and 8 of
terminal block
7.
Terminals
9
and 10 are wired for use with
a fourth relay.
See the: section on modifications for mor'e
information.
\~arning
light circuits should not be grounded
at any point and should not draw mOLe than 2 amps of current.
Drawing 813 7289 001 shoW's the above connections in detail.
STUDIO INTERCOTL 'JIRlNG
\Jhen connecting the studio i.ntercom units, the wiring should
be kept separat'2d from program ciI'cui ts.
Connect the Studio
A unit to terminal block 6, terminals 5A and 5B.
The Studio
B unit should connect to terminals 7A and 7B on terminal block
6.
These circuits should not be grounded.
The .c!,xecutive
6/26/62
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