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dartzeel amp schematic..build this?
dartzeel amp schematic..build this?
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Old 13th March 2019, 05:32 PM   #241
domenico80 is offline domenico80  Italy
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if I'm not mistaken it's a final amp with a pair of power amps per channel.
if I'm not mistaken, power amplifiers placed under the printout.
If you feel like trying, if they are mosfets, to put two pairs per channel: it changes a lot
it also changes from two pairs to four pairs per channel, but not as from 1 to 2
example, from 4 to 8, in my opinion, it is hardly heard, at least in a scheme like the one I posted
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Old 14th March 2019, 01:54 AM   #242
Walkalone is offline Walkalone  Viet Nam
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You are correct,
Using only one pair LMOS as output, sounding is relatively too soft, insipid. But this matter happened with Hitachi/Renesas, Exicon's single die devices.
I also used one pair, but it is dual die devices ECW20N20/ECW20P20. It's two single die device integrated inside package TO-264. That problem is fixed.

Regard,
Cuong Nguyen
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Old 15th March 2019, 10:59 AM   #243
analog_sa is offline analog_sa  Europe
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dartzeel amp schematic..build this?
Quote:
Originally Posted by gaborbela View Post
Someone re-engineered the 458 and he came up with this.
Taking into account the particular method of reverse engineering we can expect a reasonable interpretation, but not a true facsimile. Still, it appears pretty convincing.

There is one particular area which baffles me. The +-5v separate supply for the CCS and the offset compensation. Apparently the sole reason for this additional PS is to reduce the power-on thump. Seems very unlikely the original was designed this way; a separate PS for the entire front end (VAS in this case) would make much more sense.

Any thoughts?
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Old 15th March 2019, 01:22 PM   #244
domenico80 is offline domenico80  Italy
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fake news ?
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Old 15th March 2019, 03:05 PM   #245
analog_sa is offline analog_sa  Europe
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dartzeel amp schematic..build this?
That is also a possibility
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