audio preamp circuits

[ilaboo]

newbee in a way

i need a phono preamp circuit that runs off a battery 9 volts or less

need it for a magnetic cartridge turntable output into equalizer


very simple needs nothing at all fancy--using it to take vinyl onto cd
and mp3

i know i can buy one
googling for electronic circuit not helpful

must be say only one major component

very litle soldering

input would be rca jacks and ouput jacks the same

i would lke to make on those boards where you just press the component


in

any suggestion or links ( tried a bunch of them and gave up)

would really pe appreciated

tia and happy new year

peter

 

[Nicholas O. Lindan]

"ilaboo" <plener@earthlink.net> wrote

[Ultra-cheap MM phono pre-amp]

I don't know of any new monolithics, though National
used to make op-amps designed for phono pre-amps 25+ years
ago.

AOOP (any old op amp) and some R's and C's for
RIAA equalization would work fine for MP3 -
sound quality isn't an issue - even an LM324
would do. 70's era ap-notes may be a help.

If assembly cost is an issue (like > 1 part) farm the
manufacturing out to farm-wives or retirees from an
electronics factory.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com
psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

 

[Tweetldee]

"ilaboo" <plener@earthlink.net> wrote in message
news:h3fBd.8296$qf5.138@newsread3.news.atl.earthlink.net...

newbee in a way
i need a phono preamp circuit that runs off a battery 9 volts or less
need it for a magnetic cartridge turntable output into equalizer
very simple needs nothing at all fancy--using it to take vinyl onto cd and
mp3
i know i can buy one
googling for electronic circuit not helpful
must be say only one major component very litle soldering
input would be rca jacks and ouput jacks the same
i would lke to make on those boards where you just press the component in
any suggestion or links ( tried a bunch of them and gave up)
would really pe appreciated
tia and happy new year

peter

For starters, here are a few sites to look at for ideas. Your choice from
extremely simple (OK but not great performance) to fairly elaborate (really
fine performance).
http://www.redcircuits.com//Page10.htm
http://www.national.com/an/AN/AN-346.pdf
http://www.electronics.50g.com/cpowers.htm
http://www.opamplabs.com/disp.htm
http://sound.westhost.com/project25.htm

Take a look and see if there's one or two that interest you, then maybe come
back with specific questions.
--
Dave M
MasonDG44 at comcast dot net (Just subsitute the appropriate characters in
the address)

Never take a laxative and a sleeping pill at the same time!!

 

[JeffM]

i need a phono preamp circuit that runs off a battery 9 volts or less
ilaboo

The *single 9V battery* is a problem.

If you can spring for 2 batteries, things get easier.

i would lke to make on those boards
where you just press the component in

I question the wisdom of that.

You should try to find a hobbyist in your area who has built stuff
before
(local community college / high school / club).

googling for electronic circuit not helpful

You're joking. Right?

http://www.google.com/search?&q=RIAA+phono-preamp+schematic+-tube+-valve
The PAIA link is just what you need.

You seem to be saying that you will be making several.
James is right on the money with the kit suggestion.
Again, PAIA.

 

[James T. White]

"ilaboo" <plener@earthlink.net> wrote in message
news:h3fBd.8296$qf5.138@newsread3.news.atl.earthlink.net...

newbee in a way

i need a phono preamp circuit that runs off a battery 9 volts or less

need it for a magnetic cartridge turntable output into equalizer


very simple needs nothing at all fancy--using it to take vinyl onto cd
and mp3

i know i can buy one
googling for electronic circuit not helpful

must be say only one major component

very litle soldering

input would be rca jacks and ouput jacks the same

i would lke to make on those boards where you just press the component


in

any suggestion or links ( tried a bunch of them and gave up)

would really pe appreciated

tia and happy new year

peter

Peter,

Unless you are interested in learning a good bit of electronics by doing the
design yourself, try Googling for a "RIAA stereo phono preamp kit". You should
be able to find a reasonably priced one that comes with a printed circuit board,
a bag of parts and instructions for assembling it.

--
James T. White