my simple phono stage...

[dreamie 0]

hi guys,

 

it's been a long time since i posted something. how's everyone?

 

this is a simple phono stage i made some time ago for the turntable.

 

this is the front view of the phono amp.

 

you can see the connectors here. 4 RCAs with a ground binding posts.

 

Power supply is outboard.

 

More info can be found here:

http://www.anzwers.org/free/wooters/projects/vspsphono.htm

 

enjoy spinning

(Jamiroquai - synkronized)

 

cheers!

[Slumber 0]

oohh... kinda cool, me a DIY noobie, how much do u normally spend on building this amp?!

[Slumber 0]

Me feel like experimenting to build a port amp, ne place to check it out?! with my noobie skills, i might end up electrocuted =p

[sigma 0]

Me feel like experimenting to build a port amp, ne place to check it out?! with my noobie skills, i might end up electrocuted =p

Check the previous threads when the guys made CMOYs. Plenty of useful information there, since you'll probably want to build a CMOY if you're starting out.

 

This site is useful too [link]

[bpribadi 0]

Cute phono amps !

 

Ever tried to roll the op-amp? Or still using the OPA2134?

[dreamie 0]

Cute phono amps !

 

Ever tried to roll the op-amp? Or still using the OPA2134?

Changed it to OPA2604. Still letting it burn in...

[digi01 0]

good work,dreamie

 

have you try 4556 chip?

 

 

[digi01 0]

BTW,what power supply do you using for?

[dreamie 0]

Thank you digi01.

 

Have yet to try the 4556. Do not have much info on this IC too.. hehe... I chose OPA2604 to replace the original OPA2134 due to its FET input.

 

Currently using a SMPS computer powersupply, +12V and -12V. There's a powersupply in one of my project boxes which uses 2 shielded transformers, schottkey rectifiers and Matsush*ta 7812 and 7912 as regulator, but have yet to use it due to space constrains. (This amp's hidden between the turntable which is rested on a power amp and a TV. The SMPS is hidden behind the power amp.)

 

One interesting point though, even with absolutely NO shielding, there is very low noise, and I bet if there's any noise, it is from my tube preamp.

[heady 0]

dreamie, are you using moving coil or magnet pickup?

Thanks.

[dreamie 0]

dreamie, are you using moving coil or magnet pickup?

Thanks.

I'm using a MM cartridge.

[heady 0]

Dreamie, will the same layout work with MC cartridge? Thanks.

[dreamie 0]

Dreamie, will the same layout work with MC cartridge? Thanks.

This was designed for MM pickup, but RJM have another project, "VSPS ultra" which is for MC pickup.

 

This is based on the "VSPS" design by RJM.

[heady 0]

Thanks Dreamie

[dreamie 0]

Some comments after the OPA2604 have burnt in further.

 

Sibilance problem set in soon after a few days of rolling to this op-amp. Initially I thought it was the problem of the LP i recently acquired, but after changing back to the OPA2134, the sibilance problem disappeared instantly!

 

Any other FET input op-amps to recommend?