Tube Equalizer Schematic. The amplitude of each band can be controlled and center frequency can be shifted widened and narrowed. Two adjustments can be made.
Dave Schmarder S 2 Tube Audio Amplifier Tone Circuit Schematic Audio Amplifier Valve Amplifier Amplifier from www.pinterest.com
Some circuits would be illegal to operate in most countries and others are dangerous to construct and should not be attempted by the inexperienced. Updated schematic groovewatt tube valve riaa phono preamp. Two adjustments can be made.
2a3 directly heated power triode.
First while the preamp has nearly 45 db gain you can get a little more by using quality 100 uf 16 v capacitors on the cathodes of both gain stages. 2a3 directly heated power triode. That is not a baxandall eq circuit it is an active one tube gyrator type of eq. Updated schematic groovewatt tube valve riaa phono preamp.
