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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: RE: 300bs at 300volts posted by Jim Womble on May 9, 2012 at 09:38:35:
"That is very low power output. At 300v, you would want to use high current to get the dissipation up to 30 watts or so."
This would be true if you were setting the tube up for maximum power. To set the tube up for minimum distortion you would use one of WE's recommended operating points:
250V @ 60mA into 2.7k ohms; 300V @ 60mA into 3400 ohms; 350V @ 60mA into 4k ohms; 400V @ 60mA into 5k ohms; 450V @ 50mA into 6.5k ohms.
300V @ 60mA into 3400 ohms yields 5.6W @ 18W plate dissipation.
450V @ 50mA into 6.5k ohms yields 9W @ 22.5W plate dissipation.
Using these minimum distortion operating points the tube will last for years.
WE gives 450V @ 80mA into 2k ohms as the highest power level yielding 17.8W at the highest distortion level of any operating point and a plate dissipation of 36W.
Clearly, the operating point is up to the circuit designer: low power and low distortion or high power and high distortion.
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Follow Ups
- RE: 300bs at 300volts - Palustris 10:48:33 05/09/12 (1)
- Agreed. - RC Daniel 19:13:55 05/10/12 (0)
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