Hello all. I have literally inherited a KLV1000 amp. And upon checking it out with a Cobra 29, 2 watt key it blew that 4 amp fuse back by the rectifier circuit. After reading a few post on here about fuse blowing issues, I un- installed all tubes and added them back one by one and re tried each time but didn't see any RF ,but not blowing the fuse either until I got to the last one as the driver. At this point all tubes are back in and it blew upon key. I swapped driver tube out with a final tube and it popped again so I think it is not the tube but the fact it blows with a tube in the socket. When I leave the driver tube out, it doesn't pop but I still do not get any output RF. At one time the relay chattered when I let off the key and the chatter caused the watt meter on the front to jump up to about 800 watts, chattering of course only for a few seconds and it dropped. I don't see anything that looks black or burnt and the tubes all seem to glow. It has the 6KG6A tubes. Any suggestions appreciated, thanks, Jason