RE: Tone controls - Eli Duttman - Tube DIY Asylum

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RE: Tone controls

Eli Duttman

In Reply to: Tone controls posted by Triode_Kingdom on April 26, 2013 at 22:50:27:

I'm anything but expert about tone controls. However, I KNOW that TCs should be completely out of the signal path, except during their occasional periods of use. The Baxandall configuration is well respected. To date, with its "unity" gain, Max Robinson's Baxandall implementation is the best I've seen. "Unity" gain makes for easy switching in to, and out of, the signal path.

Four bottles for a stereo TC setup strike me as being way OTT, but little ingenuity is needed to replace the cap. coupled cathode followers Max used with DC coupled ZVN0545A source followers. The "sand" allows for a (IMO) much more reasonable 1 bottle/channel implementation. BTW, Max suggested DC heating. I think all will be well if the Sovtek 12AX7LPS, a genuine 7025 equivalent, is used in combination with AC heating. Love that spiral wound, hum bucking, heater. :> D

Eli D.

ZVN0545A Data Sheet (Open in New Window)

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Follow Ups Full Thread

Topic - Using Dynaco SCA-35 as power-amp - TBL 18:45:54 04/26/13 (9)

RE: Using Dynaco SCA-35 as power-amp - Eli Duttman 19:48:50 04/26/13 (8)

Tone controls - Triode_Kingdom 22:50:27 04/26/13 (5)

RE: Tone controls - Eli Duttman 04/27/1312:17:20 04/27/13 (4)

RE: Tone controls - Triode_Kingdom 14:35:21 04/27/13 (3)

RE: Tone controls - Eli Duttman 18:10:44 04/27/13 (2)

RE: Tone controls - Triode_Kingdom 18:37:16 04/27/13 (1)

RE: Tone controls - Eli Duttman 18:59:58 04/27/13 (0)

RE: Using Dynaco SCA-35 as power-amp - Tre' 21:15:57 04/26/13 (1)

RE: Using Dynaco SCA-35 as power-amp - Eli Duttman 22:25:25 04/26/13 (0)

Follow Ups

RE: Tone controls - Eli Duttman 04/27/1312:17:20 04/27/13 (4)

RE: Tone controls - Triode_Kingdom 14:35:21 04/27/13 (3)

RE: Tone controls - Eli Duttman 18:10:44 04/27/13 (2)

RE: Tone controls - Triode_Kingdom 18:37:16 04/27/13 (1)

RE: Tone controls - Eli Duttman 18:59:58 04/27/13 (0)

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