> So I took the radio our of the truck and plugged in into the control head and > power supply for my other 800 in the house and it worked fine. Therefore the > radio itself must be fine, meaning that the SWR of the system in the truck is > high and/or the power supply in the truck is problematic.
No, you can't say that until you also take the radio from the house and run it in the truck for a while and experience the same problem. The conditions are not the same as you point out in your next paragraph... > I did notice that when the truck is running, the power to the rig is a bit > high (14.5V). When keyed on high power and when the truck is off, voltage > drops from 12V to 11.6V. I think I might need to invest in a voltage > regulator. Any suggestions? Any over-power, over-voltage, over-reflected power, etc., fault that might be occuring will be worsening (or caused by) a higher supply voltage. Your truck radio could be just enough more sensitive to not tolerate as much of a fault as your house radio. I think 14.5 v is pretty common, but you could have spikes, especially in a truck, depending on your voltage regulator. You could try a power line filter, or just a good choke. Anyone who thinks mobile amateur radio is simple has not tried it! 73-John http://www.ke5c.net/mobile/
