Hi all. I currently have a DC-3. Great amp but it has had an issue the last month or so. The problem is two of the power tubes keep lighting up far more than they should. This causes the volume to drop back and is also causing amp to blow fuses. This is intermittent. I gigged with this amp last weekend without any problems, then sitting down at home to practise for a while it happened after about half an hour. I can switch it to stand by and issue disappears temporarily. I did this twice in the space of about 15 mins then turned amp off then back on again and it blew a fuse, it has done several times over the last month or so. If anyone has any idea what is going on your help would be appreciated. I have changed tubes and had amp in shop to check for dry solder joints without any luck. Cheers J