Tilt n Bands

Once when I was a little boy, I heard my uncle's equalizer which he built into his stereo. The sound was incredible. I still remember it to this day. Three potentiometers gave it a sound that I'd never heard before. I couldn't stop listening to the sound that his compact player made.

Full tube mastering equalizer

My uncle Chris

I asked my uncle for the diagram and he drew it with a pencil on a piece of paper. I quickly learned the schematic by heart and as an electronic engineer amateur, I have repeatedly built the hi-fi amplifiers using the schematic. The EQ sounded implausible each time.

After many years

After many years I decided to make a studio device based on my uncle's schematic. I improved the arrangement by adding a transformer balanced tube stage. The Tilt turned out to be a cool addition too. This vintage circuit is very useful in any mastering application. I hope, you will feel the vibe of my uncle's old radio equalizer.

I hope, you will feel the vibe of my uncle's old radio equalizer.
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  4. Specification
  1. Basic features
    Hard wire bypass yes
    Q factor 0.5 to 5
    Input & Output
    Input Impedance (balanced) 10k Ohm
    Output Impedance (balanced) 600 Ohm
    Audio transformers IGS Custom on input and output
    Operating Level +4 dBu nominal
    Max output level +19 dBu
    Noise Level -79 dB
    Frequency response 20 Hz to 40 kHz, +/-0.3dB
    Distortion (@ 20 Hz - 20 kHz)
    THD+N 0.2% (1kHz @ +19 dBu)
    Crosstalk >70dB
    Front Panel
    VU Meters Magic eye
    Voltage 230/115
    Power consumption 64W
    Power supply Linear, internal
    Packing box
    Shipping weight 11kg
    Used for Mastering, tracking
    Tube set 6x6N1P, 2x6E2
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