Low voltage drop pass tube

CarlyBoy · 3rd December 2006, 05:12 PM

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..

Tom Bavis · 3rd December 2006, 05:26 PM

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...

AndreasS · 3rd December 2006, 05:50 PM

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

CarlyBoy · 3rd December 2006, 06:32 PM

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.

3rd December 2006, 05:12 PM	#1
CarlyBoy diyAudio Member Join Date: Aug 2006	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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3rd December 2006, 05:26 PM	#2
Tom Bavis diyAudio Member Join Date: Jun 2002 Location: Macedon NY	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...

3rd December 2006, 06:32 PM	#4
CarlyBoy diyAudio Member Join Date: Aug 2006	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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