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Old 30th January 2011, 05:28 PM   #1
Jap is offline Jap  Poland
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Talking Tone control - good diagram needed

Hello

Did someone do Tube Pre Amplifier with Tone Control Schematic Diagram Adrian Angka Weblog

Is this working good? I'm looking for some tone control (tube or very good silicon one) for my DIY tube amplifier (PP 4 x EL34). It sound so perfect that for most of CDs it's not needed so I will add PURE DIRECT switch to be able turn off tone control.
But sometimes it's needed .
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Old 30th January 2011, 06:53 PM   #2
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Really good tone controls are not particularly simple. The attached Max Robinson design is "unity" gain. However, 4X 12AX7s just for stereo tone controls is (IMO) OTT. You can simply the signal path and reduce the bottle count by replacing the cap. coupled cathode followers with DC coupled ZVN0545A source followers.
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Old 31st January 2011, 05:04 PM   #3
Jap is offline Jap  Poland
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WHat do you think about silocone tone control for tube amplifier? Step by step there is lower and lower space for another things. Could you suggest some very good diagram (PCB is welcome).
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Old 31st January 2011, 10:54 PM   #4
Bigun is offline Bigun  Canada
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Have a look through this thread - a lot to learn and a proposal for tone controls you may like. No pcb though.

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Old 31st January 2011, 11:11 PM   #5
tomchr is offline tomchr  United States
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Looks like everything you need is available here:
The James-Baxandall Passive Tone-Control Network

~Tom
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