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10th September 2011, 02:59 PM
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#1 |
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diyAudio Member
Join Date: Oct 2004
Location: Aalborg, Denmark
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LatFET OPS.
Lateral FET Output stage.
With 3 pairs of Exicon ECW20N20-Z/ECW20P20-Z 16A, 250W, TO-264 Lateral FETs. Modular build, with separate IPS-VAS board. Not quite done wtih the layout, but almost. |
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10th September 2011, 03:36 PM
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#3 | |
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diyAudio Member
Join Date: Oct 2004
Location: Aalborg, Denmark
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Quote:
 There will be mounted an output coil parallel with R20, just not done yet. 
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10th September 2011, 04:53 PM
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#5 | |
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diyAudio Member
Join Date: Oct 2004
Location: Aalborg, Denmark
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Quote:
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10th September 2011, 05:13 PM
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#6 |
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diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
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Are you sure?
Will anyone else agree with you? Will all builders copying your build instructions follow your recommended matching procedure? Will they be aware of what needs to be matched and capable of meeting the standards expected?
__________________
regards Andrew T. |
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10th September 2011, 05:23 PM
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#7 | |
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diyAudio Member
Join Date: Oct 2004
Location: Aalborg, Denmark
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Quote:
Better to match Vgs instead. |
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10th September 2011, 05:23 PM
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#8 |
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diyAudio Member
Join Date: Mar 2008
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From profusions webpage regarding ECW20N20-Z:
Easy paralleling (devices available in selected categories to enhance paralleling performance) These devices do not have an integral gate - source protection diode and care must be taken with static handling precautions and the appropriate protection in the amplifier circuit |
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10th September 2011, 05:25 PM
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#9 | |
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diyAudio Member
Join Date: Oct 2004
Location: Aalborg, Denmark
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Quote:
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10th September 2011, 08:45 PM
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#10 |
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diyAudio Member
Join Date: Nov 2009
Location: algeria/france
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No source resistors doesnt matter provided the Vth are the same
and that the temperature coeeficient is negative already at low current, preferably 100mA , as with renesas l fets. I use three paralleled hitachi lateral fet pairs , and the amp did and still work for twenty years... The protection diodes should be connected to the bases of the drivers, not to the emitters. |
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