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Old 3rd March 2006, 06:49 PM   #1
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Default New stock pre -amp tubes. Whats good?

I looking into ordering some tubes for my Aikido pre and was wondering which "new" stock type tubes being manufactured today are worth getting. I see Sovtek, EI, JJ, Electro Harmonics, Sino etc. to name a few. Has anyone have opinions on what's works for them and which ones are trash? 6SN7, 6CG7, 5687, 12BH7, 12B4 or 6DJ8 comes to mind for now.

NOS could be in the future once things get settled out but for now cheap is fine.
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Old 3rd March 2006, 06:52 PM   #2
anatech is offline anatech  Canada
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Hi RockysDad,
How's Rocky?

I've used Electroharmonix and had good luck. I hear JJ are very good also. They are not expensive compared to NOS and I don't think you can go wrong with either.

-Chris
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Old 3rd March 2006, 07:16 PM   #3
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Quote:
Originally posted by anatech
Hi RockysDad,
How's Rocky?

I've used Electroharmonix and had good luck. I hear JJ are very good also. They are not expensive compared to NOS and I don't think you can go wrong with either.

-Chris

He's been a great dog all these years but has been pooping on the lawn recently. Gotta watch where you walk now...

Which tubes have you tried so far? I'm leaning towards 6CG7/6FQ7 or 6SN7 for now.
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Old 3rd March 2006, 07:25 PM   #4
SY is offline SY  United States
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FWIW, Broskie is quite positive about both 6SN7-types and 6FQ7/6CG7. The 12SX7, a 6SN7-type optimized for lower voltages, is also an interesting choice.
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Old 3rd March 2006, 07:45 PM   #5
anatech is offline anatech  Canada
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Hi RockysDad,
I have used 12AX7A, 6SN7, 6922, 6CG7 ... with good results. I have not tried an Aikido, so listen to SY on that one.

-Chris
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Old 3rd March 2006, 08:47 PM   #6
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Wasn't the 12SX7 the one designed for 28V usage in aircraft?

Andrew
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Old 3rd March 2006, 09:19 PM   #7
SY is offline SY  United States
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I think that is the history, yes. And it's why there's a set of operating points on the data sheet with 26.5V on the plate. Disadvantage is the very wimpy heater-cathode voltage rating (90V), which means you want to use separate tubes and heater supplies for the top tubes in order to crank the B+ voltage to where the circuit sings.
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Old 3rd March 2006, 09:46 PM   #8
Glowbug is offline Glowbug  United States
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Don't think anyone makes a new production 12B4...'tis a shame...
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