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Old 25th September 2004, 04:05 AM   #1
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Default 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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Old 25th September 2004, 03:06 PM   #2
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Hi Peter,
I've never seen that. If possible can you scan the whole leaflet and email it to me ? I'll be grateful !
Thanks,
Ashok.
ashokm (at) sify.com
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Old 25th September 2004, 03:25 PM   #3
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Actually, it is a very interesting amp design, so I will post it the whole leaflet here in 8 parts.
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Old 25th September 2004, 03:26 PM   #4
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IIRC the monoblocks were selling for $20,000.
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Old 25th September 2004, 03:28 PM   #5
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This was probably the best amp ever made by Denon.
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Old 25th September 2004, 03:30 PM   #6
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The booklet is dated 06094
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Old 25th September 2004, 03:32 PM   #7
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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)
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Old 25th September 2004, 03:34 PM   #8
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Also mechanical grounding (with specific location of feet) seems to be very important here.
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Old 25th September 2004, 03:35 PM   #9
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At the same time Denon also relesed a matching preamp, transport and DAC, similarly overbuilt.
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Old 25th September 2004, 03:37 PM   #10
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Well, that's all.

I hope you enjoyed that little slide show
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