roy algra said:I am using it with a stanton 881s cartridge.
It sounds nice but I am not really shure...
Of course! You cannot be really "shure" if you are using a stanton!
Sorry Roy, but it was so funny!
Salas said:... at MM level and gain, the cart self noise and 47k input load will dominate a single 2SK170 anyway.
roy algra said:... powered with a lab power supply ...
My 2ct: the quality of the power supply is of paramount importance in this circuit.
Just finished mine
Attachments
That's my simplistic PSU: 27Vac in, 32Vdc out. Load 200mA from one regulator.
Fiddling with PSU Designer gave the exact value for the resistors, which get luke warm. The inductors filter common mode noise, value is not that critical. For caps I used Rubicon ZLH which have good HF characteristics. The 1200uF might be exchanged for Panasonic or Elna after auditioning.
The ripple is 50mV. This could be reduced but what's more important (it might prove otherwise) is the shape of the ripple which resembles a sinus. Avoid triangular shapes as these are more difficult to filter with the regulator.
Edit: the bridge rectifier in the schematic is 90 degrees rotated. Do not built it this way
Fiddling with PSU Designer gave the exact value for the resistors, which get luke warm. The inductors filter common mode noise, value is not that critical. For caps I used Rubicon ZLH which have good HF characteristics. The 1200uF might be exchanged for Panasonic or Elna after auditioning.
The ripple is 50mV. This could be reduced but what's more important (it might prove otherwise) is the shape of the ripple which resembles a sinus. Avoid triangular shapes as these are more difficult to filter with the regulator.
Edit: the bridge rectifier in the schematic is 90 degrees rotated. Do not built it this way
Attachments
I have order some stuff for phono I will report if the sound good
rifa169 4700mf for rcrc filter with my KG 4700mf
and two new trafo 48VA from hammond 229 series :
split bobbin design,low primary to secondary coupling, balanced windings, no electrostatic shield required and low EMF radiation due to semi-toroidal design.
I hope this work better then small blu talema toroid
rifa169 4700mf for rcrc filter with my KG 4700mf
and two new trafo 48VA from hammond 229 series :
split bobbin design,low primary to secondary coupling, balanced windings, no electrostatic shield required and low EMF radiation due to semi-toroidal design.
I hope this work better then small blu talema toroid
came with all optionals
An externally hosted image should be here but it was not working when we last tested it.
Special tx
I see the pic but can not understand where are you going to use a 10v TX.....
nicoch46 said:you can see the pic ?!
I see the pic but can not understand where are you going to use a 10v TX.....
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