wdatkinson
Member
I just picked up a Spectra mid-power (VHF) with an A7 control head from ebay. After receiving the unit, and hooking it up on my bench, I noticed some odd behavior:
After the unit is powered up, will turn itself off as if power has been cut or a lack of power. My bench power supply shows 13.8v and .35a when this happens. I get no indication that the radio is drawing too much power for my power supply.
All I have hooked up are the red/black lines from the power and the control head. I have the speaker plugged into the line coming out of the control head.
When I can get the unit to come on and stay on, it seems to turn off as soon as I plug in my programming cable (DB15 plug in the rear). If I power it off completely, plug in the programming cable I can never get it to turn back on. I've checked for loose wires, connected my power supply directly to the radio, skipping the power cable in case its bad. My programming cable has the red ignition sense wire on it, but it doesn't matter if I connect it to 12v or not.
The unit will power back on and go back through its self-check. There are no diagnostic codes displayed and when its on, I can switch through the modes and program scan lists, etc. The radio was removed in a working condition and I have no doubt that the radio worked fine.
After the unit is powered up, will turn itself off as if power has been cut or a lack of power. My bench power supply shows 13.8v and .35a when this happens. I get no indication that the radio is drawing too much power for my power supply.
All I have hooked up are the red/black lines from the power and the control head. I have the speaker plugged into the line coming out of the control head.
When I can get the unit to come on and stay on, it seems to turn off as soon as I plug in my programming cable (DB15 plug in the rear). If I power it off completely, plug in the programming cable I can never get it to turn back on. I've checked for loose wires, connected my power supply directly to the radio, skipping the power cable in case its bad. My programming cable has the red ignition sense wire on it, but it doesn't matter if I connect it to 12v or not.
The unit will power back on and go back through its self-check. There are no diagnostic codes displayed and when its on, I can switch through the modes and program scan lists, etc. The radio was removed in a working condition and I have no doubt that the radio worked fine.
