cheap or diy phono amp

Archived from groups: rec.audio.tech (More info?)

>i have recently purchased a yamaha turntable in mint condition (it is
>a late 80s-early 90s model). my dilemma is that i need a way to
>amplify/change the output so i can use a standard aux-in on my home
>receiver (which has no phono input)
>thanks to any and all who have solved this problem. if there is a
>cheap circuit i can build for under $20 i would be glad to take a look
>at that as well!

http://www.paia.com/riaa.htm is close to your price range ($23.75).
If you have a well-stocked electronic junkbox you might be able to
build the equivalent for less.

--
Dave Platt <dplatt@radagast.org> AE6EO
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Archived from groups: rec.audio.tech (More info?)

"DeserTBoB" <desertb@rglobal.net> wrote in message
news:3vfvs09pahksjle7lsftjsv8uq558p6lne@4ax.com...
> On Mon, 20 Dec 2004 20:13:23 GMT, Mason A. Clark
> <masoncNOT@THISix.netcom.comQQQ> wrote:
>
> >Had the same problem. Found a neat little pre-amp
> >at *Radio Shack* with correct phono input. <snip>
>
> You MUST be desperate to use a Rat Shack "phono preamp" for anything.
> RIAA EQ is as much as 3 dB off on those things. Surprisingly good on
> distortion, though, but noisy...60 dB s/n tops.

Max. 3 dB is not too bad. Some phono pre-amps are far worse, as are most
records.
S/N may be a worry too, but still better than most records.

It really depends on how good your records, turntable and cartridge are.

TonyP.

Archived from groups: rec.audio.tech (More info?)

>For many years Shure had a unit that was the industry standard in
>broadcast. It wasn't terribly expensive, is not a collectible, and
>millions were made.



The M64.

I have one of those and just replaced the Electrolytic caps in it.
Pretty decent It also has tape head equalization and a flat preamp mode.

While researching preamps I found The Hagerman Bugle which is supposed to be
really fantastic.

It is sold as a Half Kit. They supply the PC board and the box which is nicely
detailed. You buy the parts from DigiKey
Richard H. Kuschel
"I canna change the law of physics."-----Scotty