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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: 300B operating point posted by locust on February 22, 2007 at 22:10:31:
You are going to be running around 28 Watts out of a maximum of 35 to 40 watts. If you run through a set of tubes in less than 5 years, you might want to add 100 ohms to the end of your cathode resistor.Remember the voltage the tube sees subtracts the cathode voltage. 425 - 80 = 345 volts (I am assuming a 1K cathode resistor, a bit higher voltage if lower resistance).
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Follow Ups
- Very common 300B operating point - Chris O 04:52:26 02/23/07 (5)
- Re: Very common 300B operating point - locust 09:42:18 02/23/07 (4)
- Just raise the cathode resistance - Chris O 12:07:22 02/23/07 (3)
- Re: Just raise the cathode resistance - locust 22:14:26 02/23/07 (2)
- That is exactly as it should be. You Shughang will have a long and happy life (nt) - Chris O 07:18:05 02/24/07 (1)
- Thanks for your input! - locust 14:45:37 02/24/07 (0)
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