Hi, I had this volume problem too. I had soldered C6 on J15 incorrectly (I soldered the cap to the 2 pads facing the "outer" side of the case!). When I fixed that booboo the volume came up markedly. I then adjusted the AGC threshold, works fine now! It's not as loud as my TS570, but with the headphones on it's pretty good. Chris VA7CAB #3641