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Thumbnail Filmstrip of DACT Line Stage Linear Pre-amp CT-101 Images
CT-101 Pre-amplifier Line Stage
Description
The DACT CT101 is a linear 2-channel wideband audio buffer / pre-amplifier. It is built on a compact PCB, which together with the use of SMD components yields a very short signal path. The CT101 is built as two mono pre-amplifiers on one PCB and can be powered by two individual supplies for dual mono operation if required. The active devices are special ICs, and the power supply connections are decoupled with SMD capacitors.
Features
- Selectable gain 0, 6 or 12 dB.
- Wide power supply voltage range.
- Low supply current.
- Use of special active devices and SMD resistors for low distortion, large bandwidth and superb sound.
- Compact PCB, low inductance and low stray capacitance.
- True dual-mono operation when using separate power supplies for each channel.
- SMD power supply decoupling capacitors.
- Dual supply voltage regulators for each channel.
- All connectors and PCB traces are gold plated.
- Drives difficult loads and long cables.
- High-end matching power supply CT102 available.
Applications
- High performance gain/buffer pre-amplifier for CD-players, etc.
- High performance headphone amplifier.
- For upgrading Hi-fi and A/V audio equipment.
- Reference audio pre-amplifier.
- Large bandwidth amplifier.
DACT CT101 with DACT CT2 stepped attenuator.
DACT CT101 x3 with 6-gang stepped attenuator for AV / home theatre systems.
Use the DACT CT101 to build an active high quality 2-channel audio pre-amplifier. One of DACT's stereo CT2 stepped attenuators can be solder directly onto the PCB to adjust the volume. This is an almost ideal pre-amplifier for sources like CD-players. You may add DACT's CT3 audio input selector switch and / or CT4 balance control to make a pre-amplifier with more features.
Downloads
Download DACT CT101 Datasheet (228 KB)
Download DACT CT101 Instruction Manual (342 KB)
PDF files use Adobe Acrobat® Reader®, which is available here if required.
Specifications
| Gain (selectable): | 0, 6 or 12 dB |
| Bandwidth (0dB gain): | 25 MHz |
| Slew rate (0dB gain): | 500 V/us |
| S/N ratio (IHF A): | 112 dB |
| Channel matching: | +/-0.05 dB |
| Output resistance: | 0.1 Ohm |
| THD: | 0.0002 % |
| Output voltage swing: | +/- 14 V |
| Output current, max.: | >25 mA |
| Supply voltage range: | +/-5 VDC to +/-100 VDC |
| Current draw idle: (1 channel) | 2.5 mA |
| Current draw max: (1 channel) | 50 mA |
Block Diagram
DACT CT101 pre-amplifier line stage block diagram.
Layout Diagram
DACT CT101 PCB layout and size.
Sample Active Stereo Pre-amplifier Circuit
2-Channel stereo active pre-amplifier with volume control and 5 channel input selector - click image for larger view.
Review
Click here for a review by The Absolute Sound. (38 KB) Note: Outside link.
PDF files use Adobe Acrobat® Reader®, which is available here if required.
Battery Power Supplies
Click here to find out information on using a battery power supply with this pre-amplifier.
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