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Old 12th October 2006, 02:08 AM   #1
PierreG is offline PierreG  Canada
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Default Looking for a simple preamp to use with an LM4562

I'm looking for a VERY simple preamp to use with an LM4562 that would have a pot for volume control.
I would like the schematic to be very simple, so it would have only a have few parts and I would also try that LM4562 to see how it is good.

Somebody can forward me to some schematics?
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Old 12th October 2006, 08:12 AM   #2
Nuuk is offline Nuuk  United Kingdom
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Have a look here and also at the buffers page on the same site.
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Old 12th October 2006, 12:27 PM   #3
PierreG is offline PierreG  Canada
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It is on the buffered gainclone page with the OPA 627 ?
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Old 12th October 2006, 12:49 PM   #4
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Default Re: Looking for a simple preamp to use with an LM4562

Quote:
Originally posted by PierreG
I'm looking for a VERY simple preamp to use with an LM4562 that would have a pot for volume control.
I would like the schematic to be very simple, so it would have only a have few parts and I would also try that LM4562 to see how it is good.

Somebody can forward me to some schematics?

Well, how simple? Power supply, LM4562 with a feedback resistor pair to set gain, pot at input, if necessary coupling cap.

Jan Didden
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Old 12th October 2006, 01:11 PM   #5
PierreG is offline PierreG  Canada
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Default Re: Re: Looking for a simple preamp to use with an LM4562

Quote:
Originally posted by janneman



Well, how simple? Power supply, LM4562 with a feedback resistor pair to set gain, pot at input, if necessary coupling cap.

Jan Didden

Yes. It looks simple enough for me.
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Old 12th October 2006, 03:31 PM   #6
Nuuk is offline Nuuk  United Kingdom
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The link I sent you is a guide to building a completed preamp. You can use any of the buffers shown on the Buffered GC page in a preamp.

Also have a look at the preamp on the Propods page. Very simple because it uses an SMPS so you don't need to build a PSU from scratch.
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Old 12th October 2006, 04:52 PM   #7
PierreG is offline PierreG  Canada
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Thanks Nuuk.
And for the volume control. Many times I see schematics for pre and buffers and most of the time there is no volume controls or pots. I know I don't know much about electronics....
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Old 12th October 2006, 05:08 PM   #8
Nuuk is offline Nuuk  United Kingdom
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A preamp is a volume control, perhaps with a source select switch, and, if it is 'active', some sort of buffer or gain stage.

Buffer circuits can be included in a pre or stand on their own, hence no volume control is shown.

So, if you take all those things separately, choose what you want, and add them in a box, you have your custom preamp!
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Old 12th October 2006, 07:15 PM   #9
PierreG is offline PierreG  Canada
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Thank you for this explaination.
Can somebody now show me me some volume control? with a log pot?
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Old 12th October 2006, 07:49 PM   #10
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