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Old 7th February 2013, 12:03 PM   #881
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Yes Lineup,

I don't know why this was not proposed by Jean Hiraga himself.
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Old 7th February 2013, 01:23 PM   #882
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Quote:
Originally Posted by Workhorse View Post
Yes Lineup,

I don't know why this was not proposed by Jean Hiraga himself.
maybe it is not a Jean Hiraga then?
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Old 7th February 2013, 05:10 PM   #883
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Default ebay kit

HI
what about this kit?
jim's audio
how knows some thing about it?
Attached Files
File Type: pdf JIM'S AUDIO KIT.pdf (318.3 KB, 297 views)
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Old 7th February 2013, 05:24 PM   #884
osscar is offline osscar  Latvia
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hi!
My LT spice simulation does not show any improvement with this 100r resistor - even upside down - THD slightly worse with this resistor.
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Old 8th February 2013, 04:31 AM   #885
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Osscar,

My LT spice shows cross conduction above 10khz near clipping without resistor

but with resistor 560ohm, it gives better results.
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Old 8th February 2013, 05:17 AM   #886
osscar is offline osscar  Latvia
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thanks for the clarification, will try again to sim it.

regards

o.
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Old 12th February 2013, 06:05 PM   #887
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Quote:
Originally Posted by Williams Audio View Post
HI
what about this kit?
jim's audio
how knows some thing about it?
It is not an 8-watt Le Monstre but a bipolar Le Classe A design of Hiraga, beefed up to 30 watts. It should be nice sounding. It has excellent behaviour to an electrostat for instance - on 0,5 uF still no ringing or overshoot.
Now try that with Le Monstre (it does ring a bit and can't drive low impedance at 20 kHz very good).
The parts list looks ok, give it a try.
The power supply will cost you 5 times the cost of the amplifier boards
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Old 12th February 2013, 08:04 PM   #888
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thanks for the information about the ''super le monstre''
in fact i have an ACOUSTAT 3 and i am very curios to listen it
i do have a good pwr supply, i am considering to use a regulated voltage that is capable to drive 17 amps
best regards,
williams
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Old 13th February 2013, 04:54 PM   #889
jeepy is offline jeepy  Switzerland
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Quote:
Originally Posted by Williams Audio View Post
thanks for the information about the ''super le monstre''
in fact i have an ACOUSTAT 3 and i am very curios to listen it
i do have a good pwr supply, i am considering to use a regulated voltage that is capable to drive 17 amps
best regards,
williams
It will work for sure but do not call it 'Hiraga' because it will behave and sound
different due to the parts delivered by JMS (I bought bare PCB's only, they are good BTW) since I have got all the original Xtors. and also because the PSU is crucial for the Hiraga amplifiers. But yes, 0.5F /35V capaciators per rail is expensive! No toroidal Xformer. Even an EI core with screen is much better. A true Hiraga is an expensive project!.... My thoughts.
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Old 13th February 2013, 05:15 PM   #890
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hi all,
yes it is expensive thing to be an audiophile, specially with class a pwr amps
but i do have the power supply from an older project so after assembly the monster i will send a report,
best regards,
williams
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Last edited by Williams Audio; 13th February 2013 at 05:16 PM. Reason: mistake
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