for tube fans - new headphone amp
Mar 8, 2006 at 12:40 PM Thread Starter Post #1 of 9

FritzS

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Hi,
for tube fans, in Austria there gives a new headphone amp project:
Praktiker "ITM CapoTube" http://www.praktiker.at/prjkha01.htm

Praktiker Homepage http://www.praktiker.at/

All wrote in german ...
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Mar 8, 2006 at 1:55 PM Post #2 of 9

Tomo

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Ohla!

Just went thru the website. All German. All I can decern was 6C41 and ECC803S. I know they are tube codes.

I tried translating and I found that the schematics are in a booklet. I am not certain which. ...

Tomo ("I speak English and Bad English ...")
 
Mar 8, 2006 at 3:10 PM Post #3 of 9

steinchen

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to sum it up:

you have to buy 2 of their magazines (11/2005 + 1-2/2006 ) for about 4.50 EUR each plus shipping. The magazines contain the schematics and build instructions. They also offer PCBs, kits and completed amps.

They say it's a 3-stage single-ended design, the tubes are NOT configured push-pull. Tubes used are 6C41. They claim the ripple voltage at the output of their prototype to be 0.5V
 
Mar 8, 2006 at 4:36 PM Post #4 of 9

rickcr42

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Quote:

Ohla!

Just went thru the website. All German. All I can decern was 6C41 and ECC803S. I know they are tube codes.


time to add the google toolbar to your browser tomohiko.Right click anywhere on the page,select "translate into english" and read all the gory details.Actually some damn interesting pages from Germany and translate well to english unlike some of the pages from the orient which seem to drive translation software nuts
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Mar 8, 2006 at 11:35 PM Post #6 of 9

Tomo

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Yeah,

I translated the entire page with that Google thingie. A very cool toy. I used it yesterday to snoop entire Fritz's website. Hehehe.

Tomo

P.S. Hey, Fritz (or Rick). Can ya help me to decypher the pages on PCL 805 - Röhren-Kopfhörerverstärker? Traslation engine gets interrupt in the middle. ...
 
Mar 9, 2006 at 3:44 AM Post #7 of 9

rickcr42

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http://www.radiomuseum.org/tubes/tube_pcl805.html

You NEED TDSL program Tomo.This puppy is invaluable when it come to locating data sheets and/tube substitutions.

Ii use both the online version :

http://tdsl.duncanamps.com/tubesearch.php

and the software version on my computer :

http://www.duncanamps.com/tdslpe/

fast and light.I love programs on a diet and run from "bloatware" like it was a contageous disease
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BTW-all of these are highly useful programs and all light weight plus all free
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http://www.duncanamps.com/software.html

Rickamundo
 
Mar 9, 2006 at 5:11 AM Post #8 of 9

nikongod

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Quote:

Originally Posted by steinchen
They say it's a 3-stage single-ended design, the tubes are NOT configured push-pull. Tubes used are 6C41. They claim the ripple voltage at the output of their prototype to be 0.5V


thats louder thant eh sound "ripple" at comfortable volumes for me. actually worse than my speaker amp's ripple too (BEFORE the transformer...)
 
Mar 9, 2006 at 8:15 AM Post #9 of 9

FritzS

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Quote:

Originally Posted by steinchen
to sum it up:
you have to buy 2 of their magazines (11/2005 + 1-2/2006 ) for about 4.50 EUR each plus shipping. The magazines contain the schematics and build instructions. They also offer PCBs, kits and completed amps.



The main developer is Wolfgang Paltauf - he and some other have a own firm http://www.puredynamics.com/
 

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