Aikido REV D pcb - diyAudio
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Old 19th November 2010, 09:22 PM   #1
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Default Aikido REV D pcb

Looking for a good starting point on the resistor values for the 1st and 2nd stage tubes, I have a quad of NOS matched Phillips 6SN7GTB's. B+ is 300v regulated.
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Old 19th November 2010, 11:15 PM   #2
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Hello,
Check the last page of this user manual.
http://www.tubecad.com/Octal_Aikido_PCB.pdf
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Old 20th November 2010, 12:01 AM   #3
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Yes, I have that book myself, looking for recommended values, from some one running one of these
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Old 20th November 2010, 03:25 AM   #4
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Hello,
I have 12SN7ís installed in the octal Aikido I use(B+ := 300). I assembled the PCB thinking that I may try rolling in 12SL7ís at the input position. I have 1000 ohm resistors installed at the input position and 300 ohm resistors installed at the outputs. The 12SN7ís provide adequate gain. I never rolled in the 12SN7ís. The 1000 ohm resistors remain. I have never given them a thought until you ask. The 300 ohm resistors allow a little more current to drive longer interconnects.
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Old 27th November 2010, 02:38 PM   #5
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Cool! I got the preamp up and going on the new dynamotor PSU, I need to finish the other stereo board so I can get them in my car!


Ill snap a few pics when I get the system up and going.
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