Quote:
Originally Posted by Doppelkopf View Post
I think , like Ralf do , your Highoutput MC is not the right thing for paradise .
I would try an cheap/used or lent Low MC .
It was not designed for high output carts but it works wondefully with a DL160 with 1.6mv output, so that does not seem to be the problem.
Testing a Low MC could isolate the problem .
Maybe 1.6mV is OK , 2mV is too much ?
Originally Posted by Doppelkopf View Post
I think , like Ralf do , your Highoutput MC is not the right thing for paradise .
I would try an cheap/used or lent Low MC .
It was not designed for high output carts but it works wondefully with a DL160 with 1.6mv output, so that does not seem to be the problem.
Testing a Low MC could isolate the problem .
Maybe 1.6mV is OK , 2mV is too much ?
Even a high output cart does not always put out full voltage.
If playing low level passages, even a high output cart would output low voltages, so the "possible" clipping would only happen at large vinyl modulations.
If playing low level passages, even a high output cart would output low voltages, so the "possible" clipping would only happen at large vinyl modulations.
In my opinion a HO MC works better on a low impedance MC input underneath 300 OHM. I would try something between 100 and 300 OHM across the input.
2mV at the input of the Paradise gives somewhat more then 2V at the output.
The only thing that goes down is overload margin. Say there is a music peak cut at plus 20dB ( x 10 ). The paradise will put out 20V but that is at the edge of what it can handle.
This will only happen on a few extreme records, say from RR or Telarc.
I whould say a cart with 2mV at 5cm-sec is the maximum i would use with the Paradise.
The only thing that goes down is overload margin. Say there is a music peak cut at plus 20dB ( x 10 ). The paradise will put out 20V but that is at the edge of what it can handle.
This will only happen on a few extreme records, say from RR or Telarc.
I whould say a cart with 2mV at 5cm-sec is the maximum i would use with the Paradise.
If you have a fast true RMS meter you could put it behind the Paradise and measure with a
very dynamic record what actually happens. You can also put a scope there.
Overloading the Paradise is unlikely but what will your power amp do with 20V P-P input ?
You really need an attenuator behind the Paradise in those cases.
very dynamic record what actually happens. You can also put a scope there.
Overloading the Paradise is unlikely but what will your power amp do with 20V P-P input ?
You really need an attenuator behind the Paradise in those cases.
updated assembly guide
Hi folks, here the updated assembly guide, now also in german. Have fun....
Hi folks, here the updated assembly guide, now also in german. Have fun....
Just thought I would share a short progress report. The boards are complete. I tested one of the power supplies and observed oscillations at 3 MHz. The heat sink got fairly hot. Will order and add the four caps next. I am glad an easy fix has been found.
Pierre
Pierre
Many thanks Alfred. I would like to support the other requests regarding your signature - if you could keep links to the most recent guides in your signature that would make it a lot easier to find. Or may be it could be updated in the first post of this thread.
Sven
Sven
I'll add my thanks too......this continual up-dating is excellent and much appreciated. I simply have a Paradise folder and as each new up-date appears I download and file the .pdf ....easy. I then put the superseded version in the trash can. Simple.🙂
UUHH, that was difficult. But here they are. I have only 1 side (right chanal) so you hear only the voice.
"original" is the part of the grenn apple limited edition directly from apple records digial remastered
"Paradise" is the part of a MFSL Abbey Road album nearly new (one time played), Benz mirco silver 2g Tracking force, input Paradise: 2,7nF bridged with 1,2kOhm.
Do you need further information?
The tracks are very short so it is difficult to judge.
Do you mean 2.zip is a digital file ?
In the 1.zip, comming from the paradise I do not notice any "electronics nasties"... What is your TT / Arm combo ?
I would look at VTA / Antiskating / VTF.
VTA is determinant in Benz carts.
PS:
The Benz micro silver always had a somehow coarse high freq response IMO.... I sold mine because of that.
Do you mean 2.zip is a digital file ?
In the 1.zip, comming from the paradise I do not notice any "electronics nasties"... What is your TT / Arm combo ?
I would look at VTA / Antiskating / VTF.
VTA is determinant in Benz carts.
PS:
The Benz micro silver always had a somehow coarse high freq response IMO.... I sold mine because of that.
Yes you are right 1.zip is Paradise and 2.zip the digital.
My turntable is a Dual 1019, nearly original, but the tonearm is carbon.
VTA is unadjustble, it´s fixed
Antiskating is 2 as recommended with 2g tracking force.
VTF 2g
I had an tube-phono-pre before, but can´t remember any harshness like this.
But I am realy a novice in turntables so it could be a missadjusting.
I would not go under 300 Ohm , the Ownimpedance of the Benz Silver is 120 Ohm .
Edit : you can put the VTF up to 2,2gr or sligthly over .
Edit : you can put the VTF up to 2,2gr or sligthly over .
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Maybe your tube phono was hiding some high freq detail.... or your riaa caps are not perfectly dimensioned.
Did you measure the riaa caps before building ?
What is the value of the 11nF caps ? These are the high freq cap and a very small difference from spec can cause really nasty high freq peaks.