II Morrow Inc. Apollo SL50 GPS

Questions and Answers

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Christopher HamiltonJul 31, 2025
Why are the GPS signal levels very low on my II Morrow Inc. GPS?
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  John FowlerJul 31, 2025
  Low GPS signal levels on your II Morrow Inc. GPS may be caused by several factors. It could be due to improper antenna installation or coax routing. Ensure the GPS antenna is correctly installed, properly connected, and the cable is routed correctly, and that the GPS antenna is mounted on the top of the aircraft. Another potential cause is the antenna being shaded from satellites; make sure the aircraft is clear of obstructions like hangers, buildings, or trees. Radio Frequency (RF) interference at 1575.42MHz from VHF communication could also be the culprit; try moving the GPS antenna further from the communication antenna, adding a 1575.42MHz notch filter in the communication coax, fixing or replacing the communication device, or disconnecting the ELT antenna coax.
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william46Aug 5, 2025
What to do if GPS signal levels drop when avionics are turned on in my II Morrow Inc. GPS?
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  Jason WaltersAug 5, 2025
  If the GPS signal levels drop when you turn on your avionics in II Morrow Inc. GPS, it is likely due to noise interference from other avionics. To identify the source, turn off all avionics and then turn them on one at a time to isolate which device is causing the interference. Also, ensure that the GPS cable and antenna are routed away from potential sources of interference.
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Sean JonesAug 10, 2025
What to do if my II Morrow Inc. SL60 GPS does not transmit?
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  Tina RiosAug 10, 2025
  If your II Morrow Inc. SL60 GPS is not transmitting, consider the following potential causes: The TxKey input might not be pulled low (check the TxKey (mic key) input to ensure it's pulled low for transmit). You might have a weather channel selected (select a different frequency, as the unit will not transmit on a weather channel). There might be no power to the communication device (ensure the power input is connected to the communication 15 pin connector). The input voltage might be too low (increase the input supply voltage to greater than 9 volts DC).
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gcraneAug 15, 2025
How to fix II Morrow Inc. GPS SL50/60 when it does not compute a position?
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  ihunterAug 15, 2025
  If your II Morrow Inc. GPS SL50/60 is not computing a position, it might be due to not receiving signals, or an incorrect seed position, time, and date. To resolve this, ensure that a correct position, time, and date have been entered. Also, check the GPS antenna connections and make sure the aircraft is clear of obstructions such as hangers, buildings, and trees.
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campbelljohnAug 20, 2025
How to troubleshoot II Morrow Inc. SL50/60 GPS that does not power on?
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  Andrea FowlerAug 20, 2025
  If your II Morrow Inc. SL50/60 GPS does not power on, the unit is likely not getting power. Check the power connections, breakers, and the main avionics switch to ensure they are properly connected and functioning.
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Gregory WatsonAug 25, 2025
Why doesn’t the intercom function on my II Morrow Inc. Apollo SL50?
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  Kimberly HarrisonAug 26, 2025
  If the intercom on your II Morrow Inc. GPS isn’t functioning, it could be due to several reasons: The intercom select input might not be connected (the intercom select input must be pulled to ground to turn on the intercom function). An active frequency signal might be present (change the active frequency, as it has priority). There might be no voice activation, or you might have to talk too loud (change the intercom squelch threshold using the setup function described in the user’s manual).