Difference between revisions of "AN~PRC-174"

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</gallery>
 
</gallery>
  
==Control Connector Pinouts==
 
All BCD levels for frequency control are 12v high to enable that digit.
 
  
;61 Pin Israeli Connector (Small or Hex)
+
===Vehicle Mount===
:'''1''' - X23 1khz BCD8
+
<gallery widths=100px heights=100px perrow=5>
:'''2''' - X50 1mhz BCD1
+
File:PRC-174-7.JPG
:'''3''' - X30 10khz BCD1
+
File:PRC-174-8.JPG
:'''4''' - X11 100hz BCD2
+
File:PRC-174-9.JPG
:'''5''' - X10 100hz BCD1
+
File:PRC-174-10.JPG
:'''6''' - X22 1khz BCD4
+
File:PRC-174-11.JPG
:'''7''' - X43 100khz BCD8
+
File:PRC-174-12.JPG
:'''8''' - REM CONT (ground to enable remote control)
+
File:PRC-174-13.JPG
:'''9''' - N/C
+
</gallery>
:'''10''' - X51 1mhz BCD2
 
:'''11''' - X31 10khz BCD2
 
:'''12''' - X12 100khz BCD4
 
:'''13''' - IND (high to enable indicator functions)
 
:'''14''' - GND
 
:'''15''' - VOL REMOTE (remote volume control)
 
:'''16''' - BAT IN (battery pack in, might be able to charge with this pin)
 
:'''17''' - X21 1khz BCD2
 
:'''18''' - X42 100khz BCD4
 
:'''19''' - TRANSIT (pulse when 10mhz, 1mhz, 100khz or 10khz are changed)
 
:'''20''' - NCW (high when narrow CW is selected)
 
:'''21''' - WCW (high when wide CW is selected)
 
:'''22''' - DATA (high when data is selected)
 
:'''23''' - 12V REM (12 volts when remote is selected)
 
:'''24''' - X52 1mhz BCD4
 
:'''25''' - X32 10khz BCD4
 
:'''26''' - X13 100hz BCD8
 
:'''27''' - BATT CHK (high to enable battery check and LED display)
 
:'''28''' - TX LEVEL (high to enable power our and LED display)
 
:'''29''' - TUNE (high when radio is tuning)
 
:'''30''' - FO UNLOCK (high when synthesizer is unlocked)
 
:'''31''' - N/C
 
:'''32''' - S METER (analog RSSI)
 
:'''33''' - DIP (high when radio on dipole, low when on whip)
 
:'''34''' - X20 1khz BCD1
 
:'''35''' - X41 100khz BCD2
 
:'''36''' - X60 1mhz BCD1
 
:'''37''' - AM (high to enable AM mode)
 
:'''38''' - OFF (LOW when off – 24v when hi, caution)
 
:'''39''' - ON (LOW when on – 24v when hi, caution)
 
:'''40''' - USB (LOW when on USB, 12v when hi)
 
:'''41''' - R/T (LOW when tx enabled, 12v when hi)
 
:'''42''' - SSB (high to enable SSB mode)
 
:'''43''' - N/C
 
:'''44''' - X53 1mhz BCD8
 
:'''45''' - X33 10khz BCD8
 
:'''46''' - N/C – book says N/C but had some kind of pulsing on it
 
:'''47''' - SAVE/SQUELCH (hi batt save mode on 174, squelch mode on 174S)
 
:'''48''' - NO MATCH (high when no match found)
 
:'''49''' - MIC GND
 
:'''50''' - MIC HI
 
:'''51''' - PHONE (handset rx audio)
 
:'''52''' - PTT
 
:'''53''' - +12V
 
:'''54''' - ALC (not sure about this one...)
 
:'''55''' - PTT 12V
 
:'''56''' - BP (PA) (ground to bypass PA when using external amp, 100mw out)
 
:'''57''' - FIXED AUDIO (100mv fixed audio)
 
:'''58''' - X40 100khz BCD1
 
:'''59''' - X61 1mhz BCD2
 
:'''60''' - N/C – book says N/C but had some kind of pulsing on it
 
:'''61''' - LT (M.N. BP) matching network bypass
 
 
 
 
 
;66 Pin Round connector, add these pins
 
:'''62''' - SQUELCH
 
:'''63''' - N/C
 
:'''64''' - N/C
 
:'''65''' - MIC
 
:'''66''' - GND
 
  
 
==Related Files==
 
==Related Files==

Latest revision as of 16:02, 12 December 2013

PRC-174.png

Images


Vehicle Mount

Related Files

Adobe PDF icon.png OM-107-10

Technical Manual
Radio Set
PRC-174
August 1976


Adobe PDF icon.png MA(P)-2124-09514-00

ILLUSTRATED PARTS BREAKDOWN
HF-SS r. RADIO SET
RT 936/PRC as174
January 1987


Adobe PDF icon.png MA 2124-09503-00

Maintenance Manual
HF-SSB RADIO SET
PRC-174
July 1986