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12th March 2008, 09:41 AM
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#2 |
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diyAudio Member
Join Date: Apr 2003
Location: Copenhagen, Denmark
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Sometimes you prefer the sound from a certain opamp, which is only available as a dual opamp......
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12th March 2008, 10:04 AM
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#3 |
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Electrons are yellow and more is better!
diyAudio Member
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It's possible also that the company uses lot's of this type and therefore gets a good price.
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/Per-Anders (my first name) or P-A as my friends call me |
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12th March 2008, 10:37 AM
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#4 |
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diyAudio Member
Join Date: Oct 2004
Location: At the sea front, just under Rotterdam
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Not because the Mitsubishi opamp has a high Max output current ?
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12th March 2008, 12:00 PM
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#6 |
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diyAudio Member
Join Date: Oct 2004
Location: At the sea front, just under Rotterdam
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All active parts on the schematic are Mitsubishi made, smells like a Mitsubishi integrated.
(reminds me i still need one of those fancy open style Mitsu DA-A/M JFET-input power amps)
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13th March 2008, 08:21 AM
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#8 |
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diyAudio Member
Join Date: Oct 2004
Location: At the sea front, just under Rotterdam
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My bad, i should look at a datasheet instead of talking from the less dense part of my head.
The (zener) diodes are Panasonic made, aka MAtsushita as in MA29/MA4082, Technics = Matsushita . The SU-V85 is a specimen of the late 80s/early 90s AA series, cost around $500, the TH502 thermistor in the schematic is likely the Class AA thingy. The opamp however is Mitsubishi manufacture, which is amusing because Matsuhita corp. and Mitsubishi corp. are competitors. So the choice for that opamp was cost related, must have been the most affordable option, the main motive for the high volume market.
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13th March 2008, 12:23 PM
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#9 |
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diyAudio Member
Join Date: Nov 2004
Location: KI
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Thank's jacco, but I have problem with Technics SU-V90D. Maybe You have schematic or SM for this amplifier? Before I buy this amp, somebody was changed these opamps with LM1458, and I'm was asking can I change 1458 with NE5532? (or must originally M5219)
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Dual OpAmp in input of amp?
