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| | File:PRC-174-13.JPG | | File:PRC-174-13.JPG |
| | </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)
| |
| − | :'''1''' - X23 1khz BCD8
| |
| − | :'''2''' - X50 1mhz BCD1
| |
| − | :'''3''' - X30 10khz BCD1
| |
| − | :'''4''' - X11 100hz BCD2
| |
| − | :'''5''' - X10 100hz BCD1
| |
| − | :'''6''' - X22 1khz BCD4
| |
| − | :'''7''' - X43 100khz BCD8
| |
| − | :'''8''' - REM CONT (ground to enable remote control)
| |
| − | :'''9''' - N/C
| |
| − | :'''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== |
