I managed to blow a set of K2 finals. One of the mounting screws rusted and the rust shorted one collector to ground (high resistance) so one transistor opened and the other was down to about 3 watts max. I dredged back in memory to a First Telephone License test (when they were still available) to the rules for number of spare tubes required for radio stations. I don't remember the exact numbers but one spare was required for 1-4 tubes, 2 spares for 5-8 tubes (some such numbers). So I went through the K2 schematic and ordered 3 sets of finals, 2 drivers, and some of just about everything ( from RF Parts, Mouser, Newark, Digi-key etc.). After replacing the finals I have yet to need a single spare (about 2 years). There is some moral here connected with Murphy's law or some corollary thereof. I suppose in time there won't be any through-hole parts available and if I am still around I won't be able to see well enough or solder well enough to fix anything anyway. Don't worry, be happy. Allen
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