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Jap 30th January 2011 05:28 PM

Tone control - good diagram needed

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 :sing: so I will add PURE DIRECT switch to be able turn off tone control.
But sometimes it's needed :bawling:.

Eli Duttman 30th January 2011 06:53 PM

1 Attachment(s)
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.

Jap 31st January 2011 05:04 PM

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).

Bigun 31st January 2011 10:54 PM

Have a look through this thread - a lot to learn and a proposal for tone controls you may like. No pcb though.

tomchr 31st January 2011 11:11 PM

Looks like everything you need is available here:
The James-Baxandall Passive Tone-Control Network


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