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1632 + transistor output
1632 + transistor output
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Old 30th November 2019, 03:26 PM   #1
AnthonyA is offline AnthonyA
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Default 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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Old 30th November 2019, 05:30 PM   #2
Nelson Pass is offline Nelson Pass  United States
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1632 + transistor output
Why not? TI licensed the patent from us....

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Old 30th November 2019, 05:45 PM   #3
Zen Mod is online now Zen Mod  Serbia
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1632 + transistor output
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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Old 30th November 2019, 08:05 PM   #4
tunasto is offline tunasto  Serbia
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Isn't Russ from twisted pear audio did something similar?
Maybe i'm wrong, you can check on their site, and here on this forum...
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Old 1st December 2019, 01:13 AM   #5
coolnose is offline coolnose  Europe
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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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Old 1st December 2019, 04:44 AM   #6
AnthonyA is offline AnthonyA
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So..

I'll just stick this in front of any preamp say ba3? Susy ba3. Sounds right?
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Old 1st December 2019, 07:40 AM   #7
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1632 + transistor output
why in front of preamp , if you making a preamp itself?
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Old 1st December 2019, 07:55 AM   #8
AnthonyA is offline AnthonyA
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Susy opamp + preamp.. Lol I don't know how to design and make the best of what I can. That's why I am asking
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Old 1st December 2019, 08:15 AM   #9
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1632 + transistor output
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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Old 5th December 2019, 06:18 AM   #10
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Worthwhile to make a jfet complementary input? Output 1632? Or just opa 1642 1612 like what other does? I see this can be very high end as well... Corus Jeff Roland.
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