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Old 20th July 2006, 03:51 PM   #1
Ryssen is offline Ryssen  Sweden
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Default Tubes as preamp..

Any one done anything with ECC86 or Ecc88/6DJ8 for car use,preamp or anything else fun?
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Old 24th July 2006, 10:56 AM   #2
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Default Vibration....

I would not recommend using tubes in a car as vibration is a tubes greatest enemy. This will break. Also, if you want to use them, you may need a step-up supply as they run on voltages much higher than the battery supply in a car environment.
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Old 24th July 2006, 05:36 PM   #3
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Default Re: Vibration....

Quote:
Originally posted by rt7085
I would not recommend using tubes in a car as vibration is a tubes greatest enemy. This will break. Also, if you want to use them, you may need a step-up supply as they run on voltages much higher than the battery supply in a car environment.
I had a tube system in my car for over 6 years (4 12AX7s and 4 5881GC's) with absolutely no problems. Tubes have been used in rugged applications for quite a long time with a good track record. Soon enough I shall be putting another tube system in my car.
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Old 24th July 2006, 06:29 PM   #4
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Hi, Ryssen,

You can try this, ECC88 (or 6DJ8), supply voltage is only +/-24V (You'll need to build an SMPS, though, but not a lethal voltage one )
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Old 24th July 2006, 09:57 PM   #5
Ryssen is offline Ryssen  Sweden
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Quote:
supply voltage is only +/-24V
Some guys at headwize was using ECC86 and an inverter to get +- 12v,maybe that could be sommething?
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Old 25th July 2006, 02:03 AM   #6
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+/-24V is still to high? How about this one, only 12V, the tubes you can use anything, 12AX7, 12AY7, 12AU7, ECC88, any triode you have can work, in this low voltage, because it is connected as "common grid"
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Old 25th July 2006, 12:53 PM   #7
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Are you using the cathode as a grid?
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Old 25th July 2006, 02:13 PM   #8
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Cathode=signal input, anode via 100k+transistor=output, grid to ground via 1k.
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Old 25th July 2006, 05:09 PM   #9
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What transistor are beeing used,just any ordinary or?
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Old 25th July 2006, 05:34 PM   #10
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Anything in your hand will work, but gain like BC550 or BC560 better
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