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In article , Slick writes
The easiest way to rule out the assumed voltage drop problem is to wire the
b40 up on a separate battery then try transmitting.

Unfortunately, that will also tend to remove problems caused by RF being
sent down the feed cable, so you won't know exactly what you have
achieved. Which is why I suggest wiring direct to the same battery.

Tim Newport-Peace

"Indecision is the Key to Flexibility."