Hi, I've diagnosed my Primare 30.5 and found one of its channels has blown all its output transistors. (thank god they saw fit to put seperate fuses feeding each of its 5 mains transformers!) Anyway, I'm trying to find the following :- Toshiba 2SC5200 Toshiba 2SA1943 two of each, must be matched across all four. (I know you can get matched pairs, but unsure if you can get matched quads?) Interestingly enough the same channel has been previously repaired, the first driver stages have been replaced at some point - maybe causing damage to the outputs causing them to fail now? If anyone can point me towards a supplier, or if any of our forum dealers can supply these it would be very much so appreciated. PM me if you can help! Whilst the amp is in bits I'm going to take the opportunity to modify the heatsink and install two temperature controlled 12V fans - it doesn't run that hot but I'd like it to run a lot cooler. I'll be doing the same to the 30.3 as well, as that runs stinking hot, and heat is the enemy of all electronic components! Thanks in advance to anyone who can help me.