| 5150ed |
| Can anyone suggest schematic of preamp or buffer with gain more than 10X and matched with inverted GC? |
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| Nuuk |
Here is a simple opamp buffer with a gain of 11.
or at least it would be if the file would upload! |
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| 5150ed |
Ho thank u so much Nuuk.
Can you tell me which chip # is used in this schematic ?
Is the step place before or after the buffer? Can I use my 100K step? |
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| Nuuk |
Depends if you use single or dual opamps. I suggest goig for singles. Try OPA134 to start with.
Put your buffer after your 100K pot. |
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| 5150ed |
100K Pot :bigeyes: :bigeyes: :bigeyes: .
555 I can save big bug now.
Anyway, what should be the +- voltage for this opamp??? and how can I design the PSU of it? |
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| Nuuk |
| A suitable PSU is shown on Decibel Dungeon. See the DD Project pre-amp and the GC buffer and pre-amp pages. |
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| 5150ed |
| Hmmmm..... Can I use OPA627AP or AD797AN instate of DRV134PA??? |
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| Christer |
You should use your pot/attenautor instead of the 51 k resistor in the schematic. You don't want that resistor to load down the pot.
AD797 is probably a bad idea for line level circuits. It is specially designed for low-level low-noise applications, and has some internal design choices that might not be so good for high input levels. |
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| Nuuk |
Who mentioned DRV134PA? :confused:
What you need to do is RESEARCH! There is a lot of information available and a lot to learn. You can't build good hi-fi just by asking questions - it isn't that easy! ;)
Look at datasheets. You can find out what voltages are involved. Look at other people's circuits and see what they use. Get something simple up and running frst - then start to tweak with exotic components.:att'n: |
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| 5150ed |
Thank u Nuuk and Christer.
I shut my mouth for a while ;) . |
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