madbeanpedals::forum

General => Open Discussion => Topic started by: AntKnee on April 20, 2017, 06:13:36 PM

Title: Phono preamp
Post by: AntKnee on April 20, 2017, 06:13:36 PM
I need a preamp for my turntable and was considering building a vero layout because... why not? Do any of you have experience with prhono preamps? I was wondering if you had any thoughts or advice on whether it is worthwhile to build one vs just buying a decent one. Like pedals, they seem overpriced for what they are.
Title: Re: Phono preamp
Post by: electrosonic on April 20, 2017, 06:35:28 PM
I made the Elliott sound version a few years ago. Works well.

http://sound.whsites.net/project06.htm (http://sound.whsites.net/project06.htm)

Andrew.
Title: Re: Phono preamp
Post by: davent on April 20, 2017, 08:28:57 PM
I've made a couple different ones. The vero friendly one is the Very Simple Phono Stage. Few parts, nothing exotic, can run on batteries and i thought sounded very good.

http://phonoclone.com/diy-pho5.html

(http://i216.photobucket.com/albums/cc305/davent/IMG_2069.jpg)

(http://i216.photobucket.com/albums/cc305/davent/IMG_2071.jpg)

dave
Title: Re: Phono preamp
Post by: pickdropper on April 21, 2017, 04:24:11 AM
What kind of cartridge do you use?  If it's a standard MM, there are a lot more options.

If you have a Moving Coil, especially a low output one, you may need step-up transformers.  For example, my cart only has 250uV output so I need a LOT of gain on tap.
Title: Re: Phono preamp
Post by: AntKnee on April 21, 2017, 09:00:39 AM
Quote from: pickdropper on April 21, 2017, 04:24:11 AM
What kind of cartridge do you use?  If it's a standard MM, there are a lot more options.

If you have a Moving Coil, especially a low output one, you may need step-up transformers.  For example, my cart only has 250uV output so I need a LOT of gain on tap.

Honestly, I don't know. I scored an MCS direct drive turntable and I'm just setting it up for use. My receiver doesn't have a phono input, so here I am. I think it is the standard MM. I've seen mentions of this in my research up to now, but I assumed it was MM.
Title: Re: Phono preamp
Post by: pickdropper on April 21, 2017, 08:50:00 PM
Quote from: AntKnee on April 21, 2017, 09:00:39 AM
Quote from: pickdropper on April 21, 2017, 04:24:11 AM
What kind of cartridge do you use?  If it's a standard MM, there are a lot more options.

If you have a Moving Coil, especially a low output one, you may need step-up transformers.  For example, my cart only has 250uV output so I need a LOT of gain on tap.

Honestly, I don't know. I scored an MCS direct drive turntable and I'm just setting it up for use. My receiver doesn't have a phono input, so here I am. I think it is the standard MM. I've seen mentions of this in my research up to now, but I assumed it was MM.

In all likelihood it is MM, but it's worth double checking before going to the trouble of building a phono stage.
Title: Re: Phono preamp
Post by: stecykmi on April 22, 2017, 12:37:30 PM
here's my project (http://www.madbeanpedals.com/forum/index.php?topic=15606.msg147223#msg147223) from a while back. i still use this device. the jfets for this project are a little hard to get unfortunately.