The 40 amp fuse requirement should be a clue. MaraTracs have 100-110 watt transmitters that require a solid 26-30 amps @13.8 volts to work at specs. If your power supply isn't capable of continuous and clean 13.6 volts @ 30+ amps, you need to stop and get a power supply that IS capable of powering the MaraTrac.
Get a volt meter and check the voltage at the power supply terminals. If the voltage is OK with no load, but is NOT OK with the radio connected, you need to stop and contact a qualified technician. Not to be mean, but you have demonstrated several times in this thread that you have neither the electrical knowledge nor the experience to proceed further without the strong probability of damaging the radio, if you haven't already damaged it. We are willing to help you, but blindly trying to diagnose something through an inexperienced second party relationship over distance is a crap shoot at best. Go back to the tech that helped you out previously.
Get a volt meter and check the voltage at the power supply terminals. If the voltage is OK with no load, but is NOT OK with the radio connected, you need to stop and contact a qualified technician. Not to be mean, but you have demonstrated several times in this thread that you have neither the electrical knowledge nor the experience to proceed further without the strong probability of damaging the radio, if you haven't already damaged it. We are willing to help you, but blindly trying to diagnose something through an inexperienced second party relationship over distance is a crap shoot at best. Go back to the tech that helped you out previously.
Last edited: