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25th September 2004, 04:05 AM
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#1 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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Any info on Hitachi 2SJ217/2SK1297 UHC-MOS devices?
Well, I was just going through some older DENON literature and it looks like their flagship mono amps (from mid 90's) are using those devices.
Seems like an interesting circuit with a single push-pull circuit delivering 1400W into 1 ohms.
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www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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25th September 2004, 03:25 PM
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#3 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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Actually, it is a very interesting amp design, so I will post it the whole leaflet here in 8 parts.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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25th September 2004, 03:26 PM
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#4 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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IIRC the monoblocks were selling for $20,000.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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25th September 2004, 03:28 PM
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#5 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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This was probably the best amp ever made by Denon.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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25th September 2004, 03:30 PM
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#6 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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The booklet is dated 06094
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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25th September 2004, 03:32 PM
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#7 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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I especially like the mechanical aspects of the whole construction.If you notice the heatsinks are probably cast and a plate of copper is placed on the whole contact area. This definitely helps with heat transfer (from devices to the sink)
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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25th September 2004, 03:34 PM
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#8 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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Also mechanical grounding (with specific location of feet) seems to be very important here.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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25th September 2004, 03:35 PM
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#9 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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At the same time Denon also relesed a matching preamp, transport and DAC, similarly overbuilt.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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25th September 2004, 03:37 PM
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#10 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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Well, that's all.
I hope you enjoyed that little slide show 
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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