RT220B

Range

ID-310

Azimuth

ID-307

Control

Power Supply

115V/ 3A/ 400Hz

28V dc/1A

Morse code

45 pin

10 pin

19 pin

19 pin

7 pin

26 pin

37 pin

14 pin

J1906

J1905

J1902

J1901

Antenna

HN

12

13

3

9

MT 928

C886

Plugs

 

The 3 plugs for the cockpit instruments and 4 on the rackmount  are MIL-C-5015 style plugs  like the DS5015 series  from Amphenol-Socapex

 

The cable parts are

 

Plug        Type   / Shellsize

J1601  DS3106A 20-27 P

J1701  DS3106A 28-21 S

J1801  DS3106A 28-12 S

J1906  DS3106A 18- 1 P

J1905  DS3106A 22-14 P

J1902  DS3106A 22-14 S

J1901  DS3106A 18- 9 S

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Other ARN21 versions

Parts and  Diagrams

British (ST)ARN-21

Beacon Simulator

Photo Galery

Waveforms

 Wiring

Course Indicators

Background

 

A tribute to its inventor, Sven H. Dodington.

VINTAGE AVIONICS

ARN21 CaBle set

Control panel                          To        color

            J1906                      C-866

                   A        on                         A          red

                   B        T/R                       C           grey

           11   C        tens (12 side)      G          green

                   D        +28V                    H , M   white

                   E        gnd                       J            black

                   F         -                            I            yellow

           14   G        units ( 0 side)     D          blue

             6   H        headset                B           pink

           13   I          units ( 9 side)     E           purple

           12   J         tens (00 side)      F           brown

                                  speaker        N         

Azimuth Indicator               To        color

              J1905                       ID-307

           36   A        motor                   C           purple

           28   B        15Hz (R)             p           yellow

           33   C        24V ac                 A,F       red

           21   D        135Hz (R)           R           yel/brown

           43   E        -                           

           42   F         -                           

                   H        +28 via 33k

           41   J         gnd                       B,E,      black

           25   K        15Hz in               m          green

           34   L        Valid

           35   M       Tacho                   D          grey/brown

           27   N        15Hz (C)             n           grey

           17   P         -

           20   R        135Hz  (C)          T           pink

           19   S         135Hz rotor        N          white

                   T        gnd                       P, S      brown

           26   U        15Hz in               k           red/blue

                 not used: wh/gr, wh/ybr/gr, blue, 

 

Range Indicator                 To         color

               J1902                      ID-310

           41    B        gnd                       

           40    C        gnd                        B,E,Y   black

                   D       gnd                        G,K      grey

           31    E        4kHz rotor           A           white

           38    F                                     

           37    G       4kHz (C)              D           brown/grey

           29    H       Motor                   H           pink

                   J         Tx  + 28V            M          brown.grn

           15    K       + range pot          R           red

           22    L        -  range pot          T           blue

           23    M       wiper pot             S            yellow

                   N       -                            

           39    P        Valid coil             N           purple

           30    R        Tacho                   L           white/green

           33    S        24V ac                  F,J         red/blue

           10    T        4kHz (R)              Z           white/yell

 

Power Supply                      To        color

              J1901                      generator

           45    A       gnd                                 

             1    C        115V ac var freq    (320-1000Hz)

           44    D       +28V dc ( 0.8A max) 

             3    E        115V ac fixed freq   (360-440Hz)

For each wire in each  cable, you find in the table:

Plug nr, pin # on the 45-pole plug on the RT220 (if applicable), pin # on the rackmount plug, signal description, pin #  (TO) on the cockpit instrument, and the color of the wire that I have used.