SIGTRONICS MINI PANEL MOUNT INTERCOMS

The Intercom That Set The Standard Sigtronics pioneered the voice activated intercom market in 1974 and continues to deliver value and performance today in the 4 or 6 place FAA TSO approved SPA-400 / 600 intercom series. With fail safe features that allow pilots to always hear the radio even if the intercom is off, and radio priority that assures ATC only hears the crew member transmitting, the SPA intercom series is the standard by which all others are judged. Individual Mic Bias Allows The Use of Different Brands of Headsets General aviation headset microphones draw power from the intercom or radio mic line. Some poorly designed intercom systems hook all the headsets to one mic line so that all the headsets must share the same power. Because different headsets have different power requirements, one headset may draw just enough power to work but there may not be enough power left over for any of the other headsets to function. With this type of design two identical headsets will work most of the time but get different types and models then you will have a problem. The only way to fix this is to modify or replace the intercom system with one that uses separate mic input lines. All Sigtronics intercom systems use separate mic input lines and do not have this problem. Compact Size Choose either rectangular (horizontal or vertical) or circular faceplate mounting configuration to fit anywhere in the cockpit. With a compact 2.5" x 1" sized panel, the SPA system will easily fit in the tightest panels. All installation hardware including jack kit and pre-wired harness are included. High Noise Environment N Series The SPA-400N / 600N FAA TSO approved High Noise Environment Intercom Series is designed specifically for experimental, ultralights, warbirds, helicopters, and other high noise aircraft. Push to intercom as well as voice activated intercom is available as desired. Tested by Sigtronics at ambient noise levels of between 115-120 decibels, the SPA-400N / 600N outperformed all other intercoms on the market, panel mounted as well as portable. Technical Information in PDF Installation and Operating Instructions SPA-400 Installation and Operating SPA-400N Installation and Operating SPA-600 Installation and Operating SPA-600N Installation and Operating SPA Panel Template RES-401 / 601 Installation RES-401 / 601 Operating Radio Specific Installation Instructions Figure 4 installation drawing modification for specified radios. SPA-400 For Apollo SL-40 Radio SPA-400 For Com 120 Radio SPA-400 For Garmin GNC250/XL Radio SPA-400 For ICOM A-200 Radio SPA-400 For ICOM A20, A21 Radio SPA-400 For ICOM A3, A6 , A22, A24 Radios SPA-400 For King KA 134 Audio Panel SPA-400 For King KMA 20 Audio Panel SPA-400 For King KY 97A Radio SPA-400 For Microair 760 Radio SPA-400 For Narco MK12D Radio SPA-400 For U-174 / U Headset Jacks Modification 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 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. Trouble-shooting Comm Radio Transmit Instructions designed to assist avionics technicians in diagnosing comm’ radio transmit problems following intercom installation. Helpful Hints SPA N Communicating in Unusually High Noise Environments

Features

FAA TSO approved. Pilot fail safe feature allows pilot to always hear radios. Works with all brands of General Aviation headsets. Reversible face plate included for vertical or horizontal mounting. Radio priority assures that ATC hears only the crew member transmitting. Installation hardware included, including jack kit & pre-wired harness.

Specifications

Size:4" x 2.5" x 1" Weight Unit: 4.5 oz. Weight Jacks & Harness: 5.5 oz.

Description Part Number Price Buy SPA-400 S THRU 4 WAY (STANDARD) 11-02791 $216.00 SPA-600 6-WAY (STANDARD) 11-02801 $252.00 SPA-400N 4-WAY (HIGH NOISE) 11-02792 $237.00 2 THRU 4 WAY (AUTO SQUELCH) 11-02804 $324.00 6 WAY (AUTO SQUELCH) 11-02816 $360.00 RETROFIT STEREO SWITCHER-USE WITH PREVIOUSLY INSTALLED SPA-400 INTERCOM 11-02796 $129.00