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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Specification

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

Levels
Operating Level	+4 dBu nominal
Max output level	@ 1.6% THD +37 dBv; +26dBv @ 20 Hz
Noise Level	-110dB

Bandwidth
Frequency response	20 Hz to 40 kHz, +/-0.3dB

Distortion (@ 20 Hz - 20 kHz)
THD+N	0.08% (1KHz @ +4 dBu)
Crosstalk	>70dB

Front Panel
VU Meters	Magic eye

Power
Voltage	230/115
Power consumption	64W
Power supply	Linear, internal

Packing box
Shipping weight	11kg

Others
Used for	Mastering, tracking
Tube set	6x6N1P, 2x6E2

Files
TnB_Hi_Boost_Cut.JPG
TnB_Mid_Boost_Cut.JPG
TnB_Bass_Boost_Cut.JPG
TnB_Tilt.jpg