JW

cheap, small phono preamp?
« on: May 20, 2020, 01:39:24 PM »
Anybody have any recommendations (like under 80 bucks or something) for a phono preamp that I can stick in a 1RU box with some switches?

My wife is tired of the current bust a** setup in the living room. So, I'm digging out my adcom 535 amp, and wiring a passive switcher box up. But I need a small, cheap phono amp. . .

The setup is not expensive or hi fi. Just some Fisher speakers, the amp I mentioned and some cheapish peripherals.

??? I don't know much about turntable phono amps, but if I can find a relatively cheap solution, I think we'd all be stoked.

But I wonder if there are any with reasonable quality. 


Ricardus

Re: cheap, small phono preamp?
« Reply #1 on: May 20, 2020, 01:44:49 PM »
I did a quick internet search some months ago and found a dozen, without even trying hard.
Audio mastering for hire..

JohnRoberts

Re: cheap, small phono preamp?
« Reply #2 on: May 20, 2020, 01:45:09 PM »
Modern op amps have gotten so much better in the decades since I stopped designing high performance phono preamps that there are decent one op amps solutions.


There are probably numerous schematics available from a web search specifying the RIAA playback EQ (pole at 3180 uSec, zero at 318 uSec, and another pole at 75uSec....) Yes I killed too many brain cells designing phono preamps over the decades. Now its almost too easy.

JR 
« Last Edit: May 20, 2020, 01:48:54 PM by JohnRoberts »
Don't only half-ass tune your drums. Visit https://circularscience.com to hear what properly "cleared" drums sound like.

Ricardus

Re: cheap, small phono preamp?
« Reply #3 on: May 20, 2020, 01:46:49 PM »
Pete Millet has some designs, but some are complicated. But I was looking for something for a friend and found a bunch of small board solutions that will fit into a box the size of a typical DI.
Audio mastering for hire..

JohnRoberts

Re: cheap, small phono preamp?
« Reply #4 on: May 20, 2020, 01:50:22 PM »
Might be worth finding a cheap pre, and upgrade the opamp and maybe film caps for RIAA eq...

JR
Don't only half-ass tune your drums. Visit https://circularscience.com to hear what properly "cleared" drums sound like.

Gold

Re: cheap, small phono preamp? New
« Reply #5 on: May 20, 2020, 04:58:01 PM »
NAD receivers and preamps  had excellent phono pre’s. Sometimes you can get a good older NAD for less than $50.

I use an NAD 1240 at home.
« Last Edit: May 20, 2020, 10:17:35 PM by Gold »


 

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