89 V for input and 85 V for output. I am waiting for som capacitors and resistors from Partsconnexion to modiify the supplys. This was what I had for a beginning.
WOW...
I went to visit Erland yesterday and after this comment I was not sure of what to expect.... 😉
But the sound was some of the best I have hear in years.....
It was warm like a tubeamplifier, open, clear and controlled at the same time..... and no matter what type of musik we played (Jazz , Classic, Rock) the result was same , warm, open and clear....
I can defiantly recommend every one this amp...... 😀😀😀😀😀
I went to visit Erland yesterday and after this comment I was not sure of what to expect.... 😉
But the sound was some of the best I have hear in years.....
It was warm like a tubeamplifier, open, clear and controlled at the same time..... and no matter what type of musik we played (Jazz , Classic, Rock) the result was same , warm, open and clear....
I can defiantly recommend every one this amp...... 😀😀😀😀😀
Thanks Kenneth I did not see your post before now. Tube alike in the treble and midrange but still with good control in the bass I think.
Hi Erlend. I'm planning out the power supplies for a new amp using the nxV500-R2 modules. Did you use a regulated supply for the front end? I see that you also used higher voltages than the recomended ones. Do the higher voltages provide an overall improvement. Thanks in advance for any help you can offer. Best Wishes, Bob
No my supply for the input section is passive with CRCRC . 2200 uf. ,44 ohm Mills,33.000 uf. , 12 ohm carbon, 380 uf.
The kind of resistor has much influence on total performance. Tried some Kiwame and they was not a succes in this case.
Also it is a good idea to change the trough hole 47 ohm resistors to an unmagnetic type.
Also I use Stainless screws for the mosfets.
I had some transformers with 60 VAC out. Transformer for input section is a few volts more.
I do not know if this high voltage gives me better sound . You know the Q = VxV x uf . So high voltage is much more enegy stored in the supply.
Maybee Mr. Holton can explain why He recommends 77 V ?
Hi Erlend and Bob
The reason 77 volts is recommended, because this is the voltage used to set the
maximum power output for the nxV500 module of 310 watts RMS into 8 ohms and 550 watts RMS into 4 ohms.
Higher supply voltages can be used, but with caution.🙂
Cheers
Anthony🙂
I did not really understand " but with caution ". Do you mean low impedances should be avoided ?
The nxV500 normally only requires 77-80 volt DC on the output and 80 voltage can be used on the input stages as well, but 85 volts would be ideal
for the input.
Cheers
Anthony
Hi anybody know if it is ok with 76 v dc on input section off NXV 200 R 3 ? The output has 55 vdc aprox.
The amp is going to be used with speakers 16 ohm in bas/ midrange.
The amp is going to be used with speakers 16 ohm in bas/ midrange.
Hi Erlend
76vdc on the input/vas stage is a bit excessive.
The recommended voltage range is 55vdc to 65vdc if you are using a 55vdc
output stage rail.
Cheers
Anthony
76vdc on the input/vas stage is a bit excessive.
The recommended voltage range is 55vdc to 65vdc if you are using a 55vdc
output stage rail.
Cheers
Anthony
Thank you very much. Houston we have a problem.
I will try 240 ohm in series with caps CRCRC ( 220/4700/4700 uf ). Voltage will drop to 73,5 Vdc a bit better.
I will try 240 ohm in series with caps CRCRC ( 220/4700/4700 uf ). Voltage will drop to 73,5 Vdc a bit better.
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