R:981218/0519Z @:NL3DAV.ZH.NLD.EU #:29370 [Leiderdorp] FBB7.00f $:27751_FR29RA
R:981218/0428Z @:NL3ZMR.ZH.NLD.EU #:29817 [Zoetermeer] FBB7.00g $:27751_FR29RA
R:981217/0750Z @:NL3LDM.ZH.NLD.EU #:23644 [L.dam] FBB7.00f $:27751_FR29RA
R:981216/2332Z @:NL3RTD.ZH.NLD.EU #:34225 [Rotterdam-Noord] $:27751_FR29RA
R:981215/0612Z @:NL3IPR.IPR.NLD.EU #:23309 [IPR] FBB7.00g $:27751_FR29RA
R:981214/0804Z @:NL3TWT.OV.NLD.EU #:11360 [hoge hexel] FBB7.00g $:27751_FR29RA
R:981214/0611Z @:NL3RYS.OV.NLD.EU #:25861 [Rijssen] FBB7.00g $:27751_FR29RA
R:981213/2127Z @:NL3TWE.OV.NLD.EU #:39545 [Enschede] FBB7.00e $:27751_FR29RA
R:981211/0127Z @:PPN20G.DK2000.PPN.DNK.EU #:56850 [Copenhagen] FBB7.00f
R:981209/2016Z @:AA1BBS.#14.WIEN.AT.EU #:44219 [Wien] FBB7.00g $:27751_FR29RA
R:981209/1912Z @:MD3BBS.#MD.NOE.AT.EU #:39760 [Perchtoldsdorf] FBB7.00f
R:981209/2004Z @:CZ6PMU.#MOR.CZE.EU #:21803 [Brno] FBB 7.00f1 $:27751_FR29RA
R:981209/1826Z @:FRA351.FBRE.FRA.EU #:28018 [LANDERNEAU - F] WINFBB7.00g
R:981208/2311Z @:FR29RA.#29.FBRE.FRA.EU #:27751 [Brest] #:27751 Z:29200

From: EURO29@FR29RA.#29.FBRE.FRA.EU
To  : MODS@WW


Here is the way I cabled out the IC-475 & IC-275 rigs for 1200bps and
9600 bps.  All I have to do is turn off the unwanted TNC.  You can't
leave both of them on or you will transmit both audios at the same time.
The color codes are for my own use to remind me of the color codes in my
own cables.  The AQS and ACC are the sockets on the rear of the sets.
BE CAREFUL OF AQS PIN 13 AND ACC(1) PIN 7.  They carry 13.8 volts and can
dammage things if accidentally shorted to other pins!  I cut them off on 
the solder side of my cable plugs.



                         CABLE PINOUTS AND COLOR CODE
                          TNC-200 TO IC-475 & IC-275
                            FOR 9600 BPS OPERATION
                              WITH UO14 AND UO22

FUNCTION      TNC RADIO PORT       IC-475 AQS     IC-275 AQS    COLOR

TX AUDIO            1                   -              2 ##      RED

GROUND              2                   9              -         BROWN
                    2                   -              1         GREY

PTT                 3                   -              7         YELLOW

RX AUDIO            4                   5 #            -         GREEN

RF DCD              5                   -              -           -

#  Existing shielded lead to AQS socket pin 5 is re-terminated inside 
IC-475 to IC6 pin 9 through 5 to 10 mfd non-polarized capacitor.  This 
lead is labeled AQAO on plug P13 on IC-475 schematic and can be removed 
easily from plug housing by CAREFULLY, slightly lifting plastic retaining 
tab on the side of P13.  IC6 pin 9 is available on a bare wire between
P13 and IC6 (they are about 1 1/2 inch apart).  It comes out on the 
component side of the board, goes about 1/2 inch and goes back in the board.  
It is easier to solder the capacitor to this bare wire than the IC itself 
and much more desirable I think.  The other capacitor lead is slipped into 
the female P13 sleeve just removed from P13.  Nothing is cut!  The bottom
of the rig is removed to get access to P13 and IC6.

## Transmit audio can be input on AQS socket pin 2 without mods.  It goes
to P12 on lead AQTN and drives Q33 through trim pot R152.  Q33 provides
plenty of gain to modulate the rig and doesn't seem to distort the transmit
audio.  You can adjust the transmit gain either in the modem or by using
R152.  I use R152 because I use the modem to drive both the IC-275 on UO14
and the IC-475 on local 9600bps packet.  That way I can independently set
the transmit audio level for both rigs and switch it between them.

                            DIN PLUG PIN LOCATIONS
                           AS SEEN FROM BACK OF PLUG

          TNC RADIO PORT                         IC-475/275 AQS PORT
           3         1                               X  X  2  1
            5       4                                X  7  X  5
                2                                    X  X  X  9
                                                          X
     ===================================================================
                         CABLE PINOUTS AND COLOR CODE
                       TAPR PSK MODEM TO IC-475 & IC-275
                             FOR 1200BPS OPERATION
                             WITH AO16 AND LO19

FUNCTION       PSK MODEM PORT      IC-475 ACC(1)   IC-275 ACC(1)  COLOR

UP/DOWN           UHF 5                 1 *            -          WHITE

GROUND          UHF 2 & 1               2              -          BLACK
                  VHF 2                 -              2          BROWN

PTT               VHF 3                 -              3          YELLOW

TX AUDIO          VHF 1                 -              4          RED

RCV AUDIO         UHF 4                 5              -          GREEN
                  VHF 4                 -              5          GREEN

           PSK MODEM PORT                       IC-475/275 ACC(1) PORT
            3         1                              X         X
             5       4                               3    X    1
                 2                                    5       4
                                                          2

*  Wired added from mic connector pin 3 to ACC(1) pin 1 in IC-475.  The mic
connector pin 3 is available on a small circuit board immediately behind
the mic socket.  The socket is wired to this board via a small ribbon cable.
ACC(1) pin 1 is not connected to anything, so the new wire must be soldered
directly to pin 1 on the back of ACC(1).  Fortunately it is on the side of
the socket nearest the side of the rig and accessable with a bit of care.
This wire is necessary only if you don't want to access it through the mic
socket.  I like all my cables on the rear of the set.  Also, this wire is 
needed only if you are using the PSK modem UP/DOWN pulsing capability to
keep your rig tuned into the downlink signals.