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Old 3rd December 2006, 05:12 PM   #1
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Default Low voltage drop pass tube

Hey All,

Can someone let me know what characteristic(s) I can look for in a series pass tube candidate of a voltage regulator circuit that will ensure a lower voltage drop across the tube? Thanks..
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Old 3rd December 2006, 05:26 PM   #2
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How much voltage and current? 6Y6 and 6W6 can pass a fair amount of current at low drop, but can't take a lot of voltage. EL34 and 6550 will be better for higher voltage and current. 6AS7/6080 will work if you can drive some grid current - actually any of them will require grid current for lowest possible drop...
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Old 3rd December 2006, 05:50 PM   #3
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Quote:
Originally posted by Tom Bavis
...6AS7/6080 will work if you can drive some grid current...
The absolute maximum grid voltage for the 6080 is 0 Volt dc!

Andreas
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Old 3rd December 2006, 06:32 PM   #4
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Actually I did want the series tube to be able to handle high supply voltage as well as a fair amount of current and low voltage drop across the tube. Looks like the EL34 is the winner. Thanks.
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