Is there a way to adjust the low power output of this radio internally? The 300 mW in low just does not cut it and jumping to high power it just eats battery. I would go into the radio if I knew there was a pot to adjust it. I measured the low power on my HP-8920 which is very accurate. Sure would be nice to have 1 or 1.5W in the low and 5W on high without have to juggle operating voltages. 73, Bob W3PT