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K O S T A S

M E T A X A S D E S I G N

S c h e m a t i c

Title

Number

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Date:

6-Jul-2003

Sheet of

File:

C:\MAS PROTEL\_ikarus_FINAL\ikarus_Final.ddb

Drawn By:

Kostas Metaxas

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METAXAS AUDIO SYSTEMS IKARUS INTEGRATED AMPLIFIER

CE1 CE2

CE3 CE4

CE5

CE6 CE7 CE8

DE5

DE6

DE7

DE8

DE9

DE10

DE11

DE12

75a

74a

13a

L1a

LS1

LS2

CP1

CP2

CP3

CP4

R66

R67

R65

R37

DL2

DL1

DL4

DL3

VOL_R

VOL_L

+30V

-30V

Q12

Q12a

Q13a

Q13

Q14

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Q11

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RA1

2
3

JP1

meterL

meterR

Содержание Ikarus

Страница 1: ...K O S T A S M E T A X A S D E S I G N Ikar us K O S T A S M E T A X A S D E S I G N ...

Страница 2: ... a d e s o f H i E n d 0 2 L i s t e n i n g R e f e r e n c e 0 5 D e s i g n P h i l o s o p h y 0 6 O p e r a t i n g I n s t r u c t i o n s 1 1 W h a t t h e c r i t i c s s a y 1 2 S p e c i f i c a t i o n s 1 4 C o n t r o l s F e a t u r e s 1 5 M a i n t e n a n c e 1 6 S c h e m a t i c 1 8 E C C o n f o r m i t y 1 9 ...

Страница 3: ...wer supply First DAC to use lowest jitter APOGEE CLOCK First FULL range and high efficiency electrostatic First Audio Manufacturer to use BMW Porsche CAD PCB software design systems Yo u a r e a b o u t t o l i s t e n t o a n a m p l i f i e r w h i c h h a s e v o l v e d f r o m o v e r 2 0 y e a r s o f d e d i c a t e d l i s t e n i n g a n d t h e a p p l i c a t i o n o f t h e s t a t e o...

Страница 4: ...K O S T A S M E T A X A S D E S I G N 3 Decades of Hi End 1980 s 02 Opulence Preamplifier Assembly Engraving Kostas Metaxas circa 1985 Soliloquy Monoblocks Ecstatic Revelation Electrostatics ...

Страница 5: ...Speaker Reference System circa 1992 Assembly Assembly CZAR 2 way full range electrostatic Opulence Marquis Charisma Preamplifiers Stainless Steel Turret Punching Iraklis on test Empress Full range electrostatics using plastic composite moulded frame PCB design EMPEROR Assembly ...

Страница 6: ...t by component basis in 3D The Protel PCB software www protel com extends the quite normal listening tests on a component by component level to the PCB level Schematic Based simulations can test or verify the PCB s signal integrity by running the Signal Integrity Simulator which displays a Reflection and Crosstalk Analysis And the 3D visualization allows one to include the PCB as part of the overa...

Страница 7: ...kest link in the playback chain K o s t a s M e t a x a s products have been conceived using extensive listening tests with a variety of state of the art ancillary equipment for more than 25 years Our amplifiers have been designed using a variety of state of the art phono playback equipment and our ABSOLUTE REFERENCE a custom made battery powered Stellavox SM 8 Tape Recorder using 1 4 tape at 30 i...

Страница 8: ... POWER SUPPLIES Every power amplifier uses a large high current power transformer which feeds a high current bridge rectifier to convert the AC from the transformer into DC voltages which are then mains ripple filtered using massive comput er grade capacitors The rectifier bridge that is normally used is relatively large handles high current and low voltage which slow switching speed because of it...

Страница 9: ...ve as it goes through R and returns back to the OUTPUT of the TRANSISTOR circuit and VALVE circuit In the VALVE circuit when 10 VOLTS travels across the 50 000 Ohms R towards the power supply impedance of 2 Ohms the 10V signal is attenuated 50 000 2 25 000 times Therefore 10V 25 000 0 0004 Volts of 1 0kHz sine wave On its way back to the OUTPUT of the circuit it is attenuated by the impedance of t...

Страница 10: ...like the output impedance or Damping Factor of a power amplifier is less than one ohm at D C If we use a 2 0 Volt zener diode as our fixed DC voltage reference at the input of the D C amplifier which has a gain of 10 the resulting output voltage is 20 Volts D C The negative feedback loop of the amplifier which fixes the gain of 10 times the 2 0 Volt zener reference is very important because it mai...

Страница 11: ...would effectively have a theoretical output impedance or Damping Factor at V of zero ohms at all fre quencies as a result of its wide bandwidth before the addition of nega tive feedback In this way the attenuation of the 10 Volts across the resistor R resid ual would be complete and no attenuated component of the 10 VOLT sine wave could be deflected and return to the OUTPUT of the circuit and caus...

Страница 12: ...astest amplifier circuit and add a slow I C voltage regulator with an output capacitor and call it a finished design Our discrete voltage regulators are designed to have the absolute lowest noise reject mains ripple but more importantly to have a speed 1000 V microsecond which is a result of their wide bandwidth design an open loop frequency response greater than 500kHz and output imped ance which...

Страница 13: ...ith the PHONO STAGE Protection Circuits The output stage of the amplifier is fused with 2A fast blow fuses M205 type which protects the amplifier in case of operating faults The low value of fuse inherently protects the following loudspeakers without the need for adding an OUTPUT RELAY Mains Fuse A 2AMP SLOW BLOW DA205 Type fuse is located on the AC MAINS SOCKET If this blows simply replace with t...

Страница 14: ... but most of all it is a high class product Silvio Delfino FEDELTA DEL SUONO Italy Provided that the back up components are of good quality listeners can expect lush well produced sounds closely akin to vacuum tubes The unit s presentation of a soundstage is astounding All dimensions are faithfully reproduced with the appropri ate focal impact There is enough air around instruments and voices to b...

Страница 15: ...z fusion and even rock the IKARUS is very impressive Its sound is correctly aggressive but at the same time warm and liquid it captivates with the intense fascination of the sound it portrays But it is with the late night lis tening session at home with the volume control set just right so as not to disturb anyone family or neighbours that the IKARUS reaches the pinnacle of enjoyment Joe Henderson...

Страница 16: ...parate individual high speed rectifier diodes and almost 40 000uF of filtering supplies only the large 200WATT toroid transformer is shared by both channels A high quality rotary switch and potentiometer ALPS in this case are the only components the signal encounters on its way to the high quality amplifier circuits allowing an incredible wealth of fine musical nuance to pass directly through to t...

Страница 17: ...K O S T A S M E T A X A S D E S I G N Contr ols Featur es 15 ...

Страница 18: ...f voltages are O K check the waveform on the oscilloscope it should show crossover distortion 7 Clip a multimeter across any of the 20X 10 OHMS output stage emitter resistors and turn the trimpot clockwise until you measure approx 0 02 VDC across this resistor Maintain for 30 minutes adjusting the pot as the amp warms up IF A FUSE BLOWS 1 Check the 30 OHMS resistors in series with the BASE of the ...

Страница 19: ...K O S T A S M E T A X A S D E S I G N Maintenance 17 ...

Страница 20: ... R17a R34a R45a R49a R39a R48a R40a R10a R9a R16a R15a R46a R47a R50a R53a R26a R27a R14a R20a R23a R4a R73a R8a R2a R3a R1a R6a R5a R7a VR5a D1a D2a R30a R31a 3 2 6 1 5 7 4 U1a Q2a Q1a Q4a Q3a R42a C3a C6a C7a C8a C4a C5a C1a C2a R38a R36a R43a Q19a Q18a C9a R41a R44a Q17a Q16a C10a R52a R51a R54a R35a R32a R33a R55a R59a R58a R56a R57a R60a R63a R62a R61a R64a METAXAS AUDIO SYSTEMS IKARUS INTEGR...

Страница 21: ...d to EN55020 Electromagnetic immunity of broadcast receivers and associated equipment In accordance with CISPR 16 1 Radio disturbance and immunity measuring apparatus CISPR 16 2 Methods of measurement of disturbances and immunity IEC 801 2 IEC 801 3 3V m 20dB IEC 801 4 1KV AC lines M a n u f a c t u r e r Metaxas Audio Systems 1460 Woodend Rd Romsey 3434 Victoria AUSTRALIA www metaxas com metaxas ...

Страница 22: ...K O S T A S M E T A X A S D E S I G N Design Philosophy 20 ...

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