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Aviation Intercoms
Sigtronics Aviation Intercom Technical Information. On this page you will find intercom instructions, parts lists, and installation information you may download. The files are in Adobe PDF format and can be opened by Adobe Reader. You will need Adobe Reader 5.0 or higher. Click on the Get Adobe Reader button below to download your free copy from Adobe.

For technical information on the use or installation of Sigtronics products not covered here, E-mail Technical Support: tech@sigtronics.com or call Monday through Friday 8:00 a.m. to 4:30 p.m. Pacific Time 909 305-9399

Last revised: Wednesday, February 1, 2012
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INSTALLATION AND OPERATING INSTRUCTIONS
Listed Alphabetically by Model Number
RES
RES
(Out of Production)		 Remote Stereo Music Switcher for Single Seat Aircraft or Non-Sigtronics Intercoms.
RES-2
RES-2 Remote Stereo Music Switcher for Single Seat Aircraft or Non-Sigtronics Intercoms.
RES-400
RES-400
(Out of Production)		 Remote Stereo Music Switcher for SPA-400 Intercoms.
RES-401 / RES-601
RES-401 / RES-601 Remote Stereo Music Switcher for SPA-400/SPA-600 Intercoms.
RES-401 / RES-601 Remote Stereo Music Switcher for SPA-400/SPA-600 Intercoms.
RMS-440 / RMS-640
RMS-440 / RMS-640 Remote Stereo Music Switcher for SAS-440/SAS-640 Intercoms.
RMS-440 / RMS-640 Remote Stereo Music Switcher for SAS-440/SAS-640 Intercoms.
SAS-440 / SAS-640
SAS-440 / SAS-640 Panel Mount Intercom with AutoSquelch and Pilot Isolate.
SAS-440 / SAS-640
Diode Mod.		 Figure 4 installation drawing modification for Non Audio Panel, Single Radio installations.
SCI-S4 / SCI-S6
SCI-S4 / SCI-S6 Panel Mount Intercom with Dual Stereo Music Inputs, Pilot Isolate, and Crew Isolate.
SCI-S4 / SCI-S6 Panel Mount Intercom with Dual Stereo Music Inputs, Pilot Isolate, and Crew Isolate.
SCI-S4 / SCI-S6
For Garmin GNC250XL Radio		 Figure 4 installation drawing modification for Garmin GNC250/XL radios.
SCI-4 / SCI-6
SCI-4 / SCI-6 Panel Mount Intercom with Dual Controls, Pilot Isolate, and Crew Isolate.
SCI-4 / SCI-6
Microair 760 Radio		 Figure 4 installation drawing modification for Microair 760 radios.
SCI-4 / SCI-6
For U-174 / U Headset Jacks		 Figure 4 installation drawing modification for U-174 / U Headset Jacks.
SCI Panel Template Panel Templates for SCI, SPA, and Sport 200 intercoms.
SDB-800
SDB-800 Panel Mount Intercom System for Aircraft with Dual Audio Panels.
SPA-400 / SPA-400N
SPA-400 Panel Mount Intercom, Standard 4 Place.
SPA-400N Panel Mount Intercom, 4 Place High Noise Version.
SPA-400
Apollo SL-40 Radio		 Figure 4 installation drawing modification for Apollo SL-40 radios.
SPA-400
AUX Audio		 Figure 4 installation drawing modification for AUX Audio Input.
SPA-400
Becker AR 3201 Radio		 Figure 4 installation drawing modification for Becker AR 3201 radios.
SPA-400
Becker AR 4201 Radio		 Figure 4 installation drawing modification for Becker AR 4201 radios.
SPA-400
Com 120 Radio		 Figure 4 installation drawing modification for Com 120 radios.
SPA-400
Flightline FL-760 Radio		 Figure 4 installation drawing modification for Flightline FL-760 radios.
SPA-400
Garmin GNC250/XL Radio		 Figure 4 installation drawing modification for Garmin GNC250/XL radios.
SPA-400
ICOM A-200, A-210 Radios		 Figure 4 installation drawing modification for ICOM A-200, A-210 radios.
SPA-400
ICOM A20, A21 Radio		 Figure 4 installation drawing modification for ICOM A20, A21 radios.
SPA-400
ICOM A3, A6 , A22, A24 Radios		 Figure 4 installation drawing modification for ICOM A3, A6, A22, A24 radios.
SPA-400
King KA 134 Audio Panel		 Figure 4 installation drawing modification for King KA 134 Audio Panel.
SPA-400
King KMA 20 Audio Panel		 Figure 4 installation drawing modification for King KMA 20 Audio Panel.
SPA-400
King KMA 24 Audio Panel		 Figure 4 installation drawing modification for King KMA 24 Audio Panel.
SPA-400
King KY 97A Radio		 Figure 4 installation drawing modification for King KY 97A radios.
SPA-400
King KY 197A Radio		 Figure 4 installation drawing modification for King KY 197A radios.
SPA-400
Microair 760 Radio		 Figure 4 installation drawing modification for Microair 760 radios.
SPA-400
Narco COM 810+ Radio		 Figure 4 installation drawing modification for Narco COM 810+ radios.
SPA-400
Narco MK12D Radio		 Figure 4 installation drawing modification for Narco MK12D radios.
SPA-400
VAL Com 760 Radio		 Figure 4 installation drawing modification for VAL Com 760 radios.
SPA-400
U-174 / U Headset Jacks		 Figure 4 installation drawing modification for U-174 / U Headset Jacks.
SPA-4S / SPA-4SN
SPA-4S / SPA-4SN Panel Mount Intercom, Standard 4 Place, Stereo, and High Noise Version.
SPA-4S / SPA-4SN Panel Mount Intercom, Standard 4 Place, Stereo, and High Noise Version.
SPA-4S / SPA-4SN
(Out of Production) 		Panel Mount Intercom, Standard 4 Place, Stereo, and High Noise Version
Serial Numbers - 4603444 and lower
SPA-4S / SPA-4SN
(Out of Production) 		Panel Mount Intercom, Standard 4 Place, Stereo, and High Noise Version
Serial Numbers - 4603444 and lower
SPA-4S
For AUX Audio Input		 Figure 4 installation drawing modification for AUX Audio Inputs.
SPA-4S
For Garmin GNC250XL Radio		 Figure 4 installation drawing modification for Garmin GNC250/XL radios.
SPA-4S
ICOM A3, A6 , A22, A24 Radios		 Figure 4 installation drawing modification for ICOM A3, A6, A22, A24 radios.
SPA-4S
ICOM A-200, A-210 Radios		 Figure 4 installation drawing modification for ICOM A-200, A-210 radios.
SPA-4S
King KY 97A Radio		 Figure 4 installation drawing modification for King KY 97A radios.
SPA-4S
Microair 760 Radio		 Figure 4 installation drawing modification for Microair 760 radios.
SPA-4S
TERRA TMA 330D, 340D, 350D RadioS		 Figure 4 installation drawing modification for TERRA TMA 330D, 340D, 350D radios.
SPA-4SN
Apollo SL-40 Radio		 Figure 4 installation drawing modification for Apollo SL-40 radios.
SPA-4SN
For AUX Audio Input		 Figure 4 installation drawing modification for AUX Audio Inputs.
SPA-600 / SPA-600N
SPA-600 Panel Mount Intercom, Standard 6 Place.
SPA-600N Panel Mount Intercom, 6 Place High Noise Version.
SPA Panel Template Panel Templates for SCI, SPA, and Sport 200 intercoms.
SPA-600
U-174 / U Headset Jacks		 Figure 4 installation drawing modification for U-174 / U Headset Jacks.
SPA-600N
U-174 / U Headset Jacks		 Figure 4 installation drawing modification for U-174 / U Headset Jacks.
SPCC-2 / SPCC-3
SPCC-2 Portable Dual Audio Panel / Intercom, 2 Radio.
SPCC-3 Portable Dual Audio Panel / Intercom, 3 Radio.
SPE-2 / SPE-4
SPE-2
(Out of Production)		 Permanent Intercom, 2 Place.
SPE-4
(Out of Production)		 Permanent Intercom, 4 Place.
SPO-20 / SPO-40
SPO-20
(Out of Production)		 Transcom Portable Intercom, 2 Place.
SPO-40
(Out of Production)		 Transcom Portable Intercom, 4 Place.
SPO-22 / SPO-42 / SPO-62
SPO-22 / -42 / -62 Transcom II Portable Battery Powered Intercom with Aux In and Out Jacks.
Sport 200
Sport 200 Panel Mount Intercom, 2 Place, High Noise.
Sport 200
Becker AR 3201 Radio		 Figure 4 installation drawing modification for Becker AR 3201 radios.
Sport 200
Becker AR 4201 Radio		 Figure 4 installation drawing modification for Becker AR 4201 radios.
Sport 200
Flightline FL-760 Radio		 Figure 4 installation drawing modification for Flightline FL-760 radios.
Sport 200
ICOM A3, A6 , A14, A22, A24 Radios		 Figure 4 installation drawing modification for ICOM A3, A6, A14, A22, A24 radios.
Sport 200
ICOM A4 Radio		 Figure 4 installation drawing modification for ICOM A4 radios.
Sport 200
ICOM A20, A21 Radios		 Figure 4 installation drawing modification for ICOM A20, A21 radios.
Sport 200
ICOM A23, A5 Radios		 Figure 4 installation drawing modification for ICOM A23, A5 radios.
Sport 200
ICOM A-200, A-210 Radios		 Figure 4 installation drawing modification for ICOM A-200, A-210 radios.
Sport 200
King KMA 24 Audio Panel		 Figure 4 installation drawing modification for King KMA 24 Audio Panels.
Sport 200
King KX 99 Radio		 Figure 4 installation drawing modification for King KX 99 radios.
Sport 200
King KX 155 / 165 Radio		 Figure 4 installation drawing modification for King KX 155 / 165 radios with Audio Amp Option.
Sport 200
King KX 197A Radio		 Figure 4 installation drawing modification for King KX 197A radios.
Sport 200
Microair 760 Radio		 Figure 4 installation drawing modification for Microair 760 radios.
Sport 200
Sporty's SP-200 Radio		 Figure 4 installation drawing modification for Sporty's SP-200 radios.
Sport 200
U-174 / U Headset Jacks		 Figure 4 installation drawing modification for U-174 / U Headset Jacks.
Sport 200
Vertex Standard VXA-300 Radio		 Figure 4 installation drawing modification for Vertex Standard VXA-300 radios.
Sport 200
XCOM VHF760 Radio		 Figure 4 installation drawing modification for XCOM VHF760 radio.
Sport 200 S
Sport 200 S Panel Mount Intercom, 2 Place, Stereo, High Noise.
Sport 200 S Panel Mount Intercom, 2 Place, Stereo, High Noise.
Sport 200 S
(Out of Production)		 Panel Mount Intercom, 2 Place, Stereo, High Noise.
Serial Numbers - 481700 and lower
Sport 200 S
(Out of Production)		 Panel Mount Intercom, 2 Place, Stereo, High Noise.
Serial Numbers - 481700 and lower
Sport 200 S
Apollo SL-30, SL-40 Radios		 Figure 4 installation drawing modification for Apollo SL-30, SL-40 radios.
Sport 200 S
For AUX Audio Input		 Figure 4 installation drawing modification for AUX Audio Inputs.
Sport 200 S
Becker AR 3201 Radio		 Figure 4 installation drawing modification for Becker AR 3201 radios.
Sport 200 S
Becker AR 4201 Radio		 Figure 4 installation drawing modification for Becker AR 4201 radios.
Sport 200 S
Filser Electronic ATR 600 Radio		 Figure 4 installation drawing modification for Filser Electronic ATR 600 radios.
Sport 200S
Flightline FL-760 Radio		 Figure 4 installation drawing modification for Flightline FL-760 radios.
Sport 200 S
ICOM A3, A6 , A22, A24 Radios		 Figure 4 installation drawing modification for ICOM A3, A6, A22, A24 radios.
Sport 200 S
ICOM A4 Radio		 Figure 4 installation drawing modification for ICOM A4 radios.
Sport 200 S
ICOM A23, A5 Radio		 Figure 4 installation drawing modification for ICOM A23, A5 radios.
Sport 200 S
ICOM A-200, A-210 Radios		 Figure 4 installation drawing modification for ICOM A-200, A-210 radios.
Sport 200 S
King KX 125 Radio		 Figure 4 installation drawing modification for King KX 125 radios.
Sport 200 S
King KY 97A Radio		 Figure 4 installation drawing modification for King KY 97A radios.
Sport 200 S
King KY 197A Radio		 Figure 4 installation drawing modification for King KY 197A radios.
Sport 200 S
For MGL V10 Radio		 Figure 4 installation drawing modification for MGL V10 radio.
Sport 200 S
Microair 760 Radio		 Figure 4 installation drawing modification for Microair 760 radios.
Sport 200 S
Sporty's SP-200 Radio		 Figure 4 installation drawing modification for Sporty's SP-200 radios.
Sport 200 S
Vertex Standard VXA-300, VXA-710 Radios		 Figure 4 installation drawing modification for Vertex Standard VXA-300 and VXA-710 radios.
Sport 200 S
XCOM VHF760 Radio		 Figure 4 installation drawing modification for XCOM VHF760 radio.
Sport 200 S
XCOM VHF760 Radio
AUX inputs		 Figure 4 installation drawing modification for XCOM VHF760 radio.
Sport 200 Panel Template Panel Templates for SCI, SPA, and Sport 200 intercoms.
SRE-2 / SRE-4
SRE-2
(Out of Production)		 Remote Mounted Intercom, 2 Place.
SRE-4
(Out of Production)		 Remote Mounted Intercom, 4 Place.
ST-400 / RES-400
ST-400 / RES-400
(Out of Production)		 Panel Mount Intercom, Standard 4 Place with Remote Stereo Music Switcher. (Manufactured Before 10/95)
ST-400 / ST-600
ST-400 / ST-600 Stereocom Panel Mount Intercom, Standard 4 and 6 Place with Remote Amplified Stereo Music Switcher.
ST-400 / ST-600 Stereocom Panel Mount Intercom, Standard 4 and 6 Place with Remote Amplified Stereo Music Switcher.
ST-440 / ST-640
ST-440 / ST-640 Panel Mount Intercom with AutoSquelch, Pilot Isolate, and Remote Stereo Music Switcher, 4 and 6 Place.
ST-440 / ST-640 Panel Mount Intercom with AutoSquelch, Pilot Isolate, and Remote Stereo Music Switcher, 4 and 6 Place.
ST-440 / ST-640
Diode Mod.		 Figure 4 installation drawing modification for Non Audio Panel, Single Radio installations.
MODIFICATION INSTRUCTIONS
Listed by Model Number
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SDB-800
SDB-800 Sidetone Modification Panel Mount Intercom Transmit Sidetone Modification Circuit Board 1528
(SDB-800 S/N 1151486 A & B to Current)
SDB-800 Sidetone Modification
(Out of Production)		 Panel Mount Intercom Transmit Sidetone Modification Circuit Board 1440
(SDB-800 S/N 1151004 A & B to 1151485 A & B)
SPA-400 / SPA-600
Dual SPA-400 / 600 Installation It allows pilot and co-pilot to transmit and receive on the aircraft radio and intercom between themselves, while back passengers can have a separate conversation without interrupting the front two.
SPA-400 / 600 Sidetone Modification Panel Mount Intercom Transmit Sidetone Modification Circuit Board 1528
(SPA-400 S/N 6069006 to Current & SPA-600 S/N 1102528 to Current)
SPA-400 / 600 Sidetone Modification
(Out of Production)		 Panel Mount Intercom Transmit Sidetone Modification Circuit Board 1440
(SPA-400 S/N 6053486 to 6069005 & SPA-600 S/N 1101839 to 1102527)
SPA-400 Sidetone Modification
(Out of Production)		 Panel Mount Intercom Transmit Sidetone Modification Circuit Board 1092-4
(SPA-400 Panel Mount, S/N 61960 to 6053485)
SPA-400 Sidetone Modification
(Out of Production)		 Panel Mount Intercom Transmit Sidetone Modification Circuit Board 1092-3
(SPA-400 Panel Mount, S/N 60975 to 61959)
SPA-400 Sidetone Modification
(Out of Production)		 Panel Mount Intercom Transmit Sidetone Modification Circuit Board 1092-2
(SPA-400 Panel Mount, S/N 60500 to 60974)
SPA-400 Sidetone Modification
(Out of Production)		 Panel Mount Intercom Transmit Sidetone Modification Circuit Board 1092
(SPA-400 Panel Mount, S/N 60001 to 60499)
SPA-400 / 600 ICS Load Modification This modification is used when a Sigtronics SPA Intercom is connected to a radio or audio panel that has a low impedance headphone output (less than 100 ohms).
SPA-400 / 600 and Portable Push-To-Talk Switches Installation Instructions for use on Sigtronics Panel Mount Intercom Systems
SPA-400 / 600 External Mic Interrupt Modification This modification applies to a Sigtronics SPA-400/600 or ST-400 / ST-600 installations.
SPA-400 / 600 Pilot Isolate Option Add pilot isolate to a SPA-400 / SPA-600 Intercom.
SPA-400, SPA-400N, SPA-600, and SPA-600N Music Input Music input options for Sigtronics SPA panel mount intercoms.
SPA-600 to SCI-6 Upgrade
SPA-600 to SCI-6 Upgrade Overview Upgrading a SPA-600 system overview.
Sport 200
Sport-200 Sidetone Modification Panel Mount Intercom Transmit Sidetone Modification Circuit Board 1528
(Sport 200 S/N 6202993 to Current)
Sport-200 Sidetone Modification
(Out of Production)		 Panel Mount Intercom Transmit Sidetone Modification Circuit Board 1440
(Sport 200 S/N 6202355 to 6202992)
Sport-200 ICS Load Modification This modification is used when a Sigtronics Sport-200 Intercom is connected to a radio or audio panel that has a low impedance headphone output (less than 100 ohms).
RES-400 / RES-600
RES-400 / RES-600 Modifications
(Out of Production)		 Music Switcher low power music source modification; Monaural wiring instructions; Notes on music sources with floating speaker outputs.
ST-400 / ST-600
Dual ST-400 / 600 Installation It allows pilot and co-pilot to transmit and receive on the aircraft radio, listen to music, and intercom between themselves, while back passengers can have a separate conversation and music without interrupting the front two.
Older ST-400 / ST-600 Units and Four Wire Speaker Output Music Systems
(Out of Production)		 Older ST-400 / ST-600 with the RES-400 or RES-600 stereo music switchers manufactured before 10/95.
(Applicable serial numbers - RES-400, 1002922 and lower. RES-600, 1050604 and lower).
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