Echolink Node 1494 update

finally fixed the damned DTMF decoder for the node, its been broken since I changed PC's a year or two ago.

Did some testing in the last couple days, tweaked the audio levels, spoke to Dave VK2JDS viaVk2BLO node on Orange repeater 146.700 and Terry VK2JTP via his node.

in summary, my node is looking in better shape now, so I can use it.