Tubes as preamp..

Ryssen · 20th July 2006, 03:51 PM

Any one done anything with ECC86 or Ecc88/6DJ8 for car use,preamp or anything else fun?

rt7085 · 24th July 2006, 10:56 AM

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.

TO-3 · 24th July 2006, 05:36 PM

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.

lumanauw · 24th July 2006, 06:29 PM

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

)

Ryssen · 24th July 2006, 09:57 PM

Quote:

supply voltage is only +/-24V

Some guys at headwize was using ECC86 and an inverter to get +- 12v,maybe that could be sommething?

lumanauw · 25th July 2006, 02:03 AM

+/-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"

Ryssen · 25th July 2006, 12:53 PM

Are you using the cathode as a grid?

lumanauw · 25th July 2006, 02:13 PM

Cathode=signal input, anode via 100k+transistor=output, grid to ground via 1k.

Ryssen · 25th July 2006, 05:09 PM

What transistor are beeing used,just any ordinary or?

lumanauw · 25th July 2006, 05:34 PM

Anything in your hand will work, but gain like BC550 or BC560 better

20th July 2006, 03:51 PM	#1
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	Tubes as preamp.. Any one done anything with ECC86 or Ecc88/6DJ8 for car use,preamp or anything else fun? __________________ Regards Åke

24th July 2006, 10:56 AM	#2
rt7085 diyAudio Member Join Date: Jul 2006	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. __________________ Never give up and play fair.

25th July 2006, 12:53 PM	#7
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	Are you using the cathode as a grid? __________________ Regards Åke

25th July 2006, 05:09 PM	#9
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	What transistor are beeing used,just any ordinary or? __________________ Regards Åke

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25th July 2006, 02:13 PM	#8
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	Cathode=signal input, anode via 100k+transistor=output, grid to ground via 1k.

25th July 2006, 05:34 PM	#10
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	Anything in your hand will work, but gain like BC550 or BC560 better

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