Please help a newbie with PSU current requirement for Aikido linestage

ncc · 24th September 2007, 02:07 PM

I'm building an Aikido linestage using all 6SN7 tubes. B+ is 300V and each (half) tube draw about 10ma. I use a PSU that can provide maximum 50ma for both channel.
I'm a newbie in Tube amp and Electronic in general, I have a question: Is my linestage draw 40ma in total or 80ma? If 80ma then I must consider building another PSU, one for each channel

Thanks in advance

jayme · 24th September 2007, 03:34 PM

If you are using 350R cathode resistors for both the input and output stages, you are drawing 10mA per tube @ 300V B+.

Thus, you have a current draw of 40mA from the PSU. Your PSU should work fine with this circuit.

Are you using a preconfigured PSU for your Aikido? If so, from where? I'd be interested in possibly picking one up as a test against my homebrew PSU....

24th September 2007, 02:07 PM	#1
ncc diyAudio Member Join Date: Jul 2006 Location: VN	Please help a newbie with PSU current requirement for Aikido linestage I'm building an Aikido linestage using all 6SN7 tubes. B+ is 300V and each (half) tube draw about 10ma. I use a PSU that can provide maximum 50ma for both channel. I'm a newbie in Tube amp and Electronic in general, I have a question: Is my linestage draw 40ma in total or 80ma? If 80ma then I must consider building another PSU, one for each channel Thanks in advance

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24th September 2007, 03:34 PM	#2
jayme diyAudio Member Join Date: Sep 2005	If you are using 350R cathode resistors for both the input and output stages, you are drawing 10mA per tube @ 300V B+. Thus, you have a current draw of 40mA from the PSU. Your PSU should work fine with this circuit. Are you using a preconfigured PSU for your Aikido? If so, from where? I'd be interested in possibly picking one up as a test against my homebrew PSU....