[Elecraft] New K3 Firmware Update (MCU rev 1.53, DSP rev 1.47)

[Mike Penkas]

I can attest that the LINE IN quirks all appear to have been
fixed. I had to turn the PRO3 on a few times the past couple
weeks just to let it know it still had a daddy! 
Couldn't be happier with the K3. 
                                Mike WA8EBM