any simple circuit for preamp using tl072

[wavenator]

do you have any simple circuit for minimal preamp with tl072?
thx guys

[petemoore]

  Microamp ?
  See elliot sound 'ESP', for some pre-amp designs.

[Mark Hammer]

Preamp for what?  Voice mic preamp?  Guitar amp front end?  "Booster" preamp?  Please clarify.

[doug deeper]

you could build this with half of it.
http://www.diyguitarist.com/PDF_Files/OpampGuitarPreamp.pdf

[dschwartz]

this my "buffter", you can use a TL072 in it...

[wavenator]

thx for all replies

anyway
i want to build a booster/preamp for my chipamp
ill try the Doug's one
but i want to use both amps in the chip

[dschwartz]

mine uses both, first one is a buffer, and second is a booster (22dB)

[wavenator]

what do you mean when you say buffer?
it will boost only some frequecny?

[petemoore]

  A buffer boosts impedance, this makes a difference in ways other than being able to drive a load [such as a low impedance input or long guitar cable, or tone control, or
 

[dschwartz]

as pete say..buffer boosts imepdance..that way, you get no tone loss due to cables or tone sucking from fx after the buffer. it adds clarity,. specially with high impedance pickups..

[wavenator]

oh cool
and what is the switch for?

[dschwartz]

buffered output or buffered-boosted output

[wavenator]

and what is the pot for?

[Barcode80]

gain... it is labelled...

[DimebuGG]

  Microamp ?
  See elliot sound 'ESP', for some pre-amp designs.

I have one made from that 100W guitar amp MKII preamp..