Trichord Dino

The Dino

The Dino is a high grade phono amplifier, designed for transparency and realism. It will maximise the performance of a wide range of quality cartridges from ultra-low output Moving Coils to high output Moving Magnet types.

The Dino is user adjustable with a set of four DIP switches on the underside of the unit for ease of access. These switches allow for adjustment of cartridge loading and gain setting.

The circuitry is signal non-inverting and constructed using high performance, audio grade bipolar and JFET operational amplifiers, metal oxide resistors and ultra low impedance capacitors throughout for lowest possible noise.

The RIAA equalisation network is fully passive and located between two active gain stages. The capacitors and resistors used in this stage are very close tolerance audiophile types.

Two state of the art ultra low impedance, low noise wide-band voltage regulators are employed to power both channels and are largely responsible for the high sonic performance of the Dino. A dc servo circuit is employed to keep the output dc level to a minimum.

Specifications for Dino phono stage
Stereo Phono Amplifier for Moving Coil and Moving Magnet cartridges.
Fully Passive RIAA equalisation between two active gain stages.

Cartridge loading     33 ohms
resistance:     100 ohms
      1k ohms
      47K ohms

Cartridge loading     MC 1.1nF
Capacitance:     MM 100pF

Switch selectable gain: MC Very Low Output 0.1 - 0.25mV 74dB
  MC Low Output 0.25 - 0.4mV 70dB
  MC Normal Output 0.4 - 0.6mV 63dB
  MM Low Output 2 - 3mV 52dB
  MM High Output 3 - 5mV 48dB
Can be powered from either AC or DC power supply:

AC Supply requirements:   0 - 17 Volts, 0 - 17 Volts
DC Supply requirements:   0 - 22 Volts, 0 - 22 Volts
Two ultra high performance 'Super Regulators'

RIAA reproduction characteristics: 20Hz - 20KHz +/-0.25dB
Dimensions: 130mm x 58mm x 112mm (D x H x W)

The Diablo

The Diablo replaces the much acclaimed Delphi and is a high performance, audiophile grade phono amplifier, designed for ultimate transparency and realism. It will maximise the performance of a wide range of phono cartridges from ultra-low output Moving Coils to high output Moving Magnet types.

The Diablo is user adjustable with a set of four DIP switches on the underside of the unit. These switches allow for adjustment of cartridge loading and gain setting.

The circuitry is signal non-inverting and constructed using high performance, audio grade bipolar and JFET operational amplifiers from Analog Devices and Linear Technology. Metal oxide resistors and ultra low impedance capacitors throughout for lowest possible noise.

The RIAA equalisation network is part passive and part active. The capacitors and resistors used in this stage are very close tolerance audiophile types.

Four 'state of the art' ultra low impedance, low noise wide-band voltage regulator circuits are employed to power both channels and are largely responsible for the high sonic performance of the Diablo.

The non-ferrous cabinetry is made of aluminium, a design that reduces Eddy current propagation that can affect sound reproduction dramatically.

Three versions of power supply are available for the Diablo including a 'Never Connected' version.

The "Never Connected" Power Supply.

The NCPSU has completely different electronics to the standard PSU1 power supply above. Instead of an oversized toroidal transformer, there is a PCB mounting variety followed by the revolutionary noise reduction circuitry that is called 'Never Connected'.

Although the regulation circuit is physically connected to the incoming mains, it is disconnected electrically. A monitoring circuit detects the portion of the sinewave that is charging the first of a pair of electrolytic capacitors. Once this first capacitor is fully charged, the diode bridge rectifier turns off and a mosfet switching circuit transfers the charge from the first cap to the second. This cycle is repeated continuously.

At no point in time is the regulation circuitry electrically connected to the incoming rectified mains - hence the term 'Never Connected'. The overall result is a large and measurable reduction in mains borne noise.

This dramatic reduction of mains borne noise enables the Diablo phono circuit to give of its very best.