I have a Kenwood TS530SP and a MC50 microphone I had bought from a friend, loaned it to another friend who used it for over a year until he got his own HF rig, and then it was stored in my hamshack/computer room/mancave closet for another year. I got it out the other day to talk to some local hams on 10 meters, (within 70 miles from my QTH). I was thrilled with the receiver and the NB that actually worked! I got great signal and transmit audio reports. I noticed some 1 kc drifting in the receiver that I "chased" to correct during my QSO's. I not only could hear the drift but could also see the frequency change on the digital display. I then noticed the rig seemed to get very hot over the PA section of the case. The fan was working. I was going to sign off to investigate and right after transmitting the AC 6 amp fuse blew. At the same time I heard a buzzing in my headphones. It took me several minuets to find a 120v 6 amp fuse. After replacing it I was back on the air and again received great reports. I watched as the temperature increased once again over the PA part of the case, verified the fan was running, and again the fuse blew right after transmitting. Yes, I again heard a buzzing sound as the fuse blew. In fear of damaging the rig further I have put it back in storage until I can find out what may be wrong. I'm thinking the 6146 finals need replaced or maybe something is wrong in HV supply? Anyone ever experience this problem? I did a little research on replacing the finals. I believe they are 6146B finals, 12by7a driver. I read I should replace them all. I also read that I should "re-solder" the tube sockets? I have never neutralized tubes before but it sounds like all I need is a RF voltmeter (or a vtvm with RF probe???) Any advice would be appreciated. I hate the idea of giving up on this ole rig. If I can get the transmitter fixed and then find out why the receiver drifts and fix that, I'll be a happy camper.