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Two things caught my attention in this "sub-thread." First, semiconductor diodes and rectifiers are not active devices. (I assume the reference was to semiconductors, as "valves" was a separate item.) Second, tubes are not more thermally stable than SS. No one would even think about building a free-running HF oscillator using tubes if stability was the goal. I have also seen audio tubes like the 6BL7 and others exhibit slow current drift (with constant voltages applied) requiring more than half an hour to stabilize. This would be unacceptable in its SS counterpart. Just sayin'...





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  • Comments - Triode_Kingdom 09:56:29 07/14/16 (3)
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