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30th November 2019, 03:26 PM
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#1 |
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diyAudio Member
Join Date: Aug 2017
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1632 + transistor output
I am just wondering
Will it be a good idea to use opa 1632 for say a preamplifier, Which have susy. And output them to a discrete transistor for better drive? 1632 have internal servo.. Or just build something like a balanced bba3 or aleph p will be better? What are the advantages quality wise.musicality .thd, harmonics etc.. Please shed some lights. |
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30th November 2019, 05:30 PM
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#2 |
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The one and only
Join Date: Mar 2001
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Why not? TI licensed the patent from us....
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30th November 2019, 05:45 PM
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#3 |
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Official Court Jester
diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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as far I remember , that chip likes lower values for Rin ?
worth checking datasheet besides that , good sounding one , I did use it as final stage , after xformer I\V DA conversion , where Rin(s) were also acting as adequate load on xformer secondary , resulting in proper linearity
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1st December 2019, 01:13 AM
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#5 |
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diyAudio Member
Join Date: Sep 2009
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juma gave it a shot...
Simple Circlotron with Lateral MOSFETs But I suspect you want a more conventionnal arrangement, I would love a single OP pair design with the 1632 as well, laterals? |
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1st December 2019, 07:40 AM
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#7 |
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Official Court Jester
diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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why in front of preamp , if you making a preamp itself?
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1st December 2019, 08:15 AM
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#9 |
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Official Court Jester
diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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I mean - that chip is capable of being preamp itself , only care is range of preferred Rin values , so it'll need buffer in front , as Juma made it in his application for Circlotron
read datasheets and related papers, think about possible parts you have for input buffers (JFets?) , do not underestimate need for decent power supply ...... and when you done with preliminary thinking about approach and concept , write back here
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