Quantcast Figure 7-9.--Control rack.
 

Click here to make tpub.com your Home Page

Page Title: Figure 7-9.--Control rack.
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

Figure 7-8.--Simplified block diagram of 1MC-6MC central amplifier announcing system.
CONTROL RACK
The  control  rack  (fig.  7-9)  is  a
bulkh ead-mou n ted enc losu r e  c on tain in g  the
pr eamplifier modules, power supply modules,
osc illator  alar m  modules,  and  the  sy stem
switc h ing  and  tr ansfer r in g  c on tr ols  and
indic ator s. The r ac k also c on tain s the c on tr ol
and power r elay s, the r elay power supply , and
the terminal boards for making connections to
the ship' s w ir in g .
The control rack preamplifier voice and
alarm  signals  from  the  microphone  control
stations, routes them to the power rack for
amplification, and then transmits them to the
various loudspeaker groups.
Preamplifier Modules
Two preamplifier modules are located in
the control rack one for each amplifier channel.
Each  preamplifier  contains  four  transistor-
amplifier stages for increasing the low-level
7.176
microphone  and  alarm  signals  to  drive
Figure 7-9.--Control rack.
7-10

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc.
6230 Stone Rd, Unit Q Port Richey, FL 34668

Phone For Parts Inquiries: (727) 493-0744
Google +