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Old 1st June 2009, 12:08 PM   #1
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Default 6GU7 in an Aikido?

Just wondering if I could use 6GU7 in place of the 6Fq7 (input tube) in my Bas Aikido board. Would I have to change cathode resistors?
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Old 4th June 2009, 12:47 AM   #2
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Any thoughts?
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Old 4th June 2009, 01:28 AM   #3
rman is offline rman  Canada
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I think Broskie mentions in hi latest entry about using that tube.
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Old 4th June 2009, 10:49 AM   #4
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Thank you

I haven't been to his site in over a year. I found the article.

I tried the 6Gu7's without any circuit changes and they sound great.
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Old 18th February 2011, 07:52 PM   #5
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You should increase Rk, though, if you use the 6GU7.

In my Aikido (240v B+) I use 470 ohm for the 6CG7 and 560 ohm for the 6GU7.
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