Stereo question

[Charmonium]

I'm trying to digitize some vinyl and I'm having a problem. I'm getting a loud background hum.

Right now, here's the setup. I have the turntable feeding into the audio in for the receiver. Then I have a cable going from one of the audio out ports to the line-in port on the PC.

Before that I had the turntable feeding directly into the line-in and there was no noise.

The reason I did it the current way is that I thought that the pre-amp would boost the signal but it looks like it's just working as a pass through since there's no boost.

So how should I do this? Do I need to get a phono stage pre-amp and use that to feed the line-in?

I've digitized tapes before going directly from a tape deck and there was plenty of signal for the recording but I'm not getting nearly enough signal coming from the turntable even when I boost the signal in the PC line-in control panel. And I don't want to overwhelm the PC sound card by trying to feed it from the headphone jack plus then there would be the issue of the line noise that I'm getting.

 

[disappoint]

You could get a phono stage pre amp to feed the line in.

I'm curious as to why the turntable directly into the line in isn't working to your satisfaction. It should work that way. It's not loud enough? It was noise free as you said.

You could also try plugging into the mic in on your PC sound card and lower the mic-in slider so it doesn't overdrive the amp. Then slowly increase the mic in slider until it sounds loud enough.

The other issue of noise is you should be looking for the source of the noise. Bad connection somewhere? Bad ground? Unshielded or poorly shielded wires? Receiver unshielded?

 

[Charmonium]

There are 2 extra wire runs for the current setup and I don't think they're shielded so yeah, that was my thought too.

I tried running the wire from the turntable to the mic-in but that didn't cut either - not enough signal.

I was really hoping to save myself the expense of a pre-amp.

 

[disappoint]

There are 2 extra wire runs for the current setup and I don't think they're shielded so yeah, that was my thought too.

I tried running the wire from the turntable to the mic-in but that didn't cut either - not enough signal.

I was really hoping to save myself the expense of a pre-amp.

I'm not sure the amp will help if there is a low signal to noise ratio. Might want to pick up some well shielded high quality cables to connect those. If there is a lot of noise the amp might just amplify the noise along with the signal.

 

[IronWing]

Turntables don't put out line level voltages. Older receivers had separate connections for "phono" with a pre-amp built into the receiver to boost the signal from the turntable. They also had a separate ground wire connecting the turntable to receiver. Not sure how to replace this this setup with a modern receiver.

Your tape player put out a line level signal so didn't need the extra boost or the ground.

 

[Charmonium]

Turntables don't put out line level voltages. Older receivers had separate connections for "phono" with a pre-amp built into the receiver to boost the signal from the turntable. They also had a separate ground wire connecting the turntable to receiver. Not sure how to replace this this setup with a modern receiver.

Your tape player put out a line level signal so didn't need the extra boost or the ground.

I do have an old Onkyo receiver with a phono input. The only possible problem is that I'm not sure it has a pre-amp output. I don't think it does but I'll check. Thanks.

 

[who?]

You'll need something to take care of this: https://en.wikipedia.org/wiki/RIAA_equalization

 

[Billb2]

The phono input on you amp will "undo" the RIAA equalization. The you take the "unequalized" (correct) signal from the line out terminals on the amp. And yes, the phonograph should be grounded to the amplifier chassis.

If the phonograph and/or amp have non polarized, non grounded wall plugs try reversing them (ie,switch the prongs by turning the plug around and re plugging it).

 

[lxskllr]

I ripped a lot of my vinyl using torrents. Came out clean, with good levels.

 

[tynopik]

https://www.amazon.com/dp/B06ZYY2876

 

[Loop2kil]

Almost 100% certain the issue is because the turntable needs to be plugged into some kind of Phono Stage. Regular inputs on a preamp/amp/receiver can't handle the output from a turntable properly. There are some cheap ones that will allow you to use the regular inputs but a cheap one will sound like a cheap one.

https://www.amazon.com/gp/product/B...&tag=coloredvinylr-20&linkId=WFZJ4VVBALMG4G3S

 

[Charmonium]

Thanks Loop. I was looking at that unit but finally decided on this one - https://smile.amazon.com/ART-Audio-DJPRE-Turntable-Preamplifier/dp/B000AJR482

 

[Loop2kil]

Thanks Loop. I was looking at that unit but finally decided on this one - https://smile.amazon.com/ART-Audio-DJPRE-Turntable-Preamplifier/dp/B000AJR482

I think that's a solid choice, I saw that one but wanted to stay as low as possible. The vinyl rabbit-hole can get out of hand quick

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