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RE: A tube journey with lesson learned, Re; KT88 & KT150

"The (so called) advantages to the KT120 and KT150 are simple: they can dissipate more heat and have higher voltage ratings. - the tube curves of the KT 120 and KT 150 ARE NOT as linear as the KT 88."

ie. as soon as you start pushing them a bit, the IMD turns the sound to mud and the THD especially 3rd and 5th harmonics go thru the roof.

If you want more clean power it's simple.
Bigger is not better. (ONLY reflector Saratov seems to think so/Mathews, cos they just want to sell that junk)

Go parallel push pull or use TV sweep valves instead.

eg.
Any 6LW6/6LX6/6LR6 will wipe the floor with the KT 12/15/17 whatever, especially with screen drive, and you won't have arcing across an octal socket (because of TC).

"A pair of 35LR6's will produce 250 watts at the onset of red plate into a 2500 ohm load on 650 volts.
4 of them made 504 watts into a 1250 ohm load on 650 volts."

You will also find the sweep tubes are running perfect a decade after being abused for 1000s of hours, unlike this Russian QC nightmare rubbish.


Edits: 01/30/24
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