ICON AUDIOMB90mk11m Monobloc

ICON AUDIOStereo 60 Mk11m

Integrated Amp w/Remote

ICON AUDIO AMPLIFIERS USING THE TUNG-SOL KT 150 VACUUM TUBE

World’s First KT150 AmplifiersBy Greg Borrowman | Tuesday, 06 August 2013 13:35Icon Audio, in the UK, has released the first amplifiers in the world capable of using the Tung Sol KT150

The Icon Audio Stereo 60 MkIIIm integrated amplifier, Stereo 60P MkIIIm power amplifier, and the MB30SE,MB90 MkIIm and MB150 monoblocs are all now available with this very affordable upgrade.

In 1958 GEC introduced the KT88, designed specifically as a hi-fi valve and intended to be the best… and for52 years most audiophiles agreed that it was the best, until Tung Sol released the KT120, a bigger, better, andmore powerful valve developed from the same design but specifically intended to be able to drive this century’smore-demanding loudspeakers. Recently, Tung Sol released a further evolution of the design: the KT150, whichit claims is even more powerful and more refined. ‘In recent months Icon Audio has been working to get thebest out of this fabulous new valve and have concluded that it is simply astonishing,’ said Brian Maddern, ofDecibel Hi-Fi, which distributes Icon Audio in Australia. ‘It can be used in single-ended, ultralinear and triodedesigns and although it’s available as an option on the current models, it’s also available as an upgrade for se-lected previous Icon Audio KT120/KT88 designs.’

Icon Audio’s amplifiers are all designed by the company’s founder David Shaw, and then mostly manufactured inIcon Audio’s own factory in China, but every amplifier is finished and tested by Icon Audio’s team of engineersin Leicester, UK before being approved for shipping to Icon Audio’s distribution network.

The Australian prices (including GST) are:Stereo 60 MkIIIm Integrated Amplifier: $4,620Stereo 60 MkIIIm Power Amplifier $4,015MB30 Single-Ended Monoblocs: $3,630 (per pair)MB90 MkIIm Monoblocs: $5,170 (per pair)MB150 Monoblocs: $6,655 (per pair)

For further information about Icon Audio, pleasecontact Decibel HiFi

Retailers selling Icon Audio in Australia in-clude: Classic Sounds (Tas); Grooveworks (Vic);Simply Hi Fi (WA); Decibel (Qld).

Pictured : The Icon Audio Stereo 60 MkIIImintegrated amplifier fitted with the new andvery distinctive Tung Sol KT150 output valves.Available now in Australia from Decibel Hi-Fi.

New Sensor, 55-01 2nd Street, Long Island City, NY 11101 Tel:718-937-8300 Fax: 718-937-9111 www.newsensor.com

KT-150 Tube

Electric characteristics at deliveryParameter name Norms Measurement mode

not less not moreHeater current, A ......................1.75 ..............2.0 ................Uf=6.3VPlate current, mA ......................150 ................180 ................Uf=6.3V

....................Ua=400V

....................Uc2=225V

....................Uc1= -14VThe second grid current, mA ............................15 ..................Uf=6.3V

....................Ua=400V

....................Uc2=225

....................Uc1= -14VTransconductance, mA/V............12.6 ......................................Uf=6.3V

....................Ua=400V

....................Uc2=225V

....................Uc1= -14VOutput power, W ......................20.0 ......................................Uf=6.3V

....................Ua=400V

....................Uc2=225V

....................Uc1= -14V

....................Uc1eff.=9.9V

....................load resistance=3KOhmNon-linear harmonic..........................................14 ..................Uf=6.3Vdistortion coefficient, % ....................Ua=400V

....................Uc2=225V

....................Uc1= -14V

....................Uc1eff.=9.9V

....................load resistance=3KOhmCathode to heater leakage current, µa ..............50 ..................UF=6.3V

............................................ ......................Uk-h=±300V

Electrical dataCathode..............................................................Oxide, indirect heatingFilament voltage (AC,DC) ................................6.3VCathode to heater voltage:

Under positive polarity at cathode ..............300VUnder negative polarity at cathode ..............300V

Interelectrode capacitance:Input (nominal) ............................................20.5pFOutput (nominal)..........................................10pFTransfer (nominal) ......................................1.75pF

Tube impedance ..........................From 10.0KOhm to 12.5KOhmMechanical dataEnvelope ............................................................Glass balloonSocket ................................................................OctalOperating position ............................................AnyDimensions

Maximum height ..........................................140mmBalloon diameter, max ................................60mmMaximum weight ........................................130g

Limiting valuesmin max

Filament voltage (AC,DC) ................6.0V ......6.6VPlate Voltage, DC ..............................................850VGrid 2 voltage, DC ............................................650VGrid 1 negative voltage......................................200VPlate dissipation ................................................70WGrid 2 dissipation ..............................................9.0WCathode current..................................................275mAResistance in grid 1 circuit

at fixed (clamp) bias ....................................0.51MOhEnvelope temp. at hottest point ........................250o C

KT-150 Tung-Sol Terminal Connections

Pin # Electrode Name1............................................2, 7........................................Heater3............................................Plate4............................................The second grid5............................................The first grid6............................................8............................................Cathode, beam-

forming plates

Tung-Sol KT-150 Vacumm Tube