¿ªÔÆÌåÓýLet me begin by saying that I have close to 140 email messages unread at this time and somebody else may have alrady offered the?"solution" that I offer below. ? One way to avoid surge damage to your radio on a restart is to prevent the radio?from being powered DURING an engine start. This is fairly simple to implement.? You'll need an SPST relay capable of switching > 30 Amps that will?activate on ~12V DC.? Connect the Common (C) terminal to your battery + terminal.? Connect your radio + line to the Normally Open (NO) terminal.? Connect the + coil terminal of the relay to the Accessory Line controlled by the ignition switch.? Ground the - coil terminal of the relay to chassis ground. ? Normal operation of the ignition switch will apply operating voltage to the relay in either RUN or ACC positions, but?NOT when the switch is moved to START. ? The only disadvantage is that you MUST use the ignition key to be able to use the radio, but will NOT leave the radio on when you leave the vehicle unless you are so forgetful as to leave the key in the ignition! ? * * * * * * * * * * * * 73 - Mac, K2GKK/5 * * (Since 30 Nov 53) * * k2gkk hotmail com * * Oklahoma City, OK * * USAF & FAA (Ret.) * * * * * * * * * * * *? ? To: ic7000@... From: jimfarley@... Date: Mon, 13 Jan 2014 08:06:16 -0800 Subject: Re: [IC-7000] Radio Restarts on Engine Startup Keith -- I see you have received many solutions and recommendations, but let me add one more.? For many years, I ran two 100-watt land-mobile two-way radios, other radios, electronic siren and emergency lights on my vehicle, all working from a second battery.?? I used a battery isolator (which I obtained from a local NAPA auto parts store) which took the output from the alternator and split it between the two now isolated batteries.? I drive a 1979 Suburban, so I had plenty of dedicated room under the hood for the second battery.? This provided two separate electrical distribution systems which did not interact.? And as a side benefit, once when I left my headlights on and drained the car battery, I was able to jump start my car from the radio battery.? I do carry a set of heavy duty jumper cables. -- Jim, KG4FXV ?
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