24v tube buffer & line stage schematic - diyAudio
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Old 29th April 2007, 08:24 AM   #1
Bem-bem is offline Bem-bem  Indonesia
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Default 24v tube buffer & line stage schematic

anyone can help me ! I need schematic 24v tube buffer & line stage schematic. Thanks.
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Old 29th April 2007, 08:42 AM   #2
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Search this site for Musical Fidelity X10D schematic. It has popped up a few times recently.

Shoog
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Old 29th April 2007, 08:55 AM   #3
d2134 is offline d2134  Romania
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You can use ECC86/6GM8/6N27P.
http://www.b-kainka.de/bastel17.htm
http://www.tubecad.com/2006/04/blog0059.htm
http://www.geocities.com/dmitrynizh/Ultrapath.htm
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Old 1st May 2007, 08:31 AM   #4
Bem-bem is offline Bem-bem  Indonesia
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Thanks for shooq & d2134.
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Old 1st May 2007, 05:09 PM   #5
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I like the look of the low voltage Tubecad Aikido, if you haven't got to long a cable to drive, or to much capacitance in the load.

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Old 2nd May 2007, 11:21 AM   #6
Bem-bem is offline Bem-bem  Indonesia
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for shoog, can you give me "audiodigit" tubalizer & tubepre complete schematic ? thanks
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Old 2nd May 2007, 01:25 PM   #7
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Quote:
Originally posted by Bem-bem
for shoog, can you give me "audiodigit" tubalizer & tubepre complete schematic ? thanks
A simple search of the forum would have found it.
I made my own schematic of the Tubalizer ( Unfortunately, I bought one for 80 Euros!!!). I had problems when using it on the recommended 12V but it works very well on 24V. It is supplied with a 6SL7 but I prefer to use it with 6SN7. I recommend designing the 6volt heater regs on a seperate supply if possible because the regulator gets REALLY hot when fed with 24V, especially with the 6SN7.

You should also read this thread. AlaistairE has designed a very nice low voltage pre that would be great for 24v. I have tried it and it's very good. 6SL7 or 6SL7GT for broken Tubalizer

Kind regards,
Martin.
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Old 2nd May 2007, 06:38 PM   #8
jleaman is offline jleaman  Belgium
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Sonusthree,

what kind of charictoristics changed when you up'd the voltage from 12v > 24 ?

Wouldent it be easyer if yuo just used a nice 6V battery insted of a regulator ?

Jase
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Old 2nd May 2007, 09:20 PM   #9
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Quote:
Originally posted by jleaman
Sonusthree,

what kind of charictoristics changed when you up'd the voltage from 12v > 24 ?

Wouldent it be easyer if yuo just used a nice 6V battery insted of a regulator ?

Jase
Hi Jase,

I found that it distorted badly at 12v but your experience may be different. It is commercially available design (80 Euros) and was made to run from a 12V wall wart. No problems at 24V for me. Actually, It would probably work OK at 16 - 18Volts but I haven't tested this myself.

A 6volt battery might work but I wouldnt like to replace the battery and, at this low voltage, I would imagine that the correct heater voltage would become more important. I'd rather stick with a 9 or 12volt supply to a 6V regulator for now.

I have commented further in this thread (that you have also posted in): http://www.diyaudio.com/forums/showt...66#post1199466

Cheers,
Martin S3
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Old 3rd May 2007, 10:58 AM   #10
plovati is offline plovati  Italy
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Default Re: 24v tube buffer & line stage schematic

Quote:
Originally posted by Bem-bem
anyone can help me ! I need schematic 24v tube buffer & line stage schematic. Thanks.
This one works from a 12V battery:

http://www.audiofaidate.it/forum/upl...tem_lowres.JPG

gain 13.7
BW (-1dB) 12Hz .. 250kHz
clipping Vout max 3Vrms on 27Kohm load
THD at 2Vrms 1%, 2nd harmonic only
THD at 1Vrms 0,78%, 2nd harmonic only ( -50dB)
output resistance less than 600ohm
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