I wish I could say my tests are any different, but I was testing my three channels in about the same way with flying wires everywhere.
I know thats just a test setup, but if you want to cancel noise in the wire, you have to twist the positive and negative together and/or add a shield. Twisting or braiding the wires as you have them looks nice but will do nothing for noise unfortunately. If you already knew that and it was just for testing, then I'm sorry, but if not, I thought I would try and help a fellow NXer out.
Let me know what you think of the noise floor. Try to be critical if you will. I know that when you get a great new thing, like these amps, working, its easy to enjoy all the good things, and overlook what bad things are there. These amps are very quiet, but I was hoping for as close to dead silence as I could get, and unfortunately, in my system this amp is noisier than my modified Acurus amp. Mind you, Noisier is absolutely a relative term, as its still very quiet. Also, though the noise floor seems higher, I will say that music emerges from blacker backgrounds, if that is possible. None the less, I would love to know if the Synergy is any quieter, and if possibly further tweaking and "dressing" will further improve the noise floor. I haven't tried new resistors yet, but I know that Cadocks and Vishays have, in the past, made my components quieter, so they may do the same here. However, Anthony told me before he thought I was hearing Shot noise, in which case only a change in transistors, i.e. active parts, will fix that.
I know thats just a test setup, but if you want to cancel noise in the wire, you have to twist the positive and negative together and/or add a shield. Twisting or braiding the wires as you have them looks nice but will do nothing for noise unfortunately. If you already knew that and it was just for testing, then I'm sorry, but if not, I thought I would try and help a fellow NXer out.
Let me know what you think of the noise floor. Try to be critical if you will. I know that when you get a great new thing, like these amps, working, its easy to enjoy all the good things, and overlook what bad things are there. These amps are very quiet, but I was hoping for as close to dead silence as I could get, and unfortunately, in my system this amp is noisier than my modified Acurus amp. Mind you, Noisier is absolutely a relative term, as its still very quiet. Also, though the noise floor seems higher, I will say that music emerges from blacker backgrounds, if that is possible. None the less, I would love to know if the Synergy is any quieter, and if possibly further tweaking and "dressing" will further improve the noise floor. I haven't tried new resistors yet, but I know that Cadocks and Vishays have, in the past, made my components quieter, so they may do the same here. However, Anthony told me before he thought I was hearing Shot noise, in which case only a change in transistors, i.e. active parts, will fix that.
H Jeffry and Matt
Jeffry Much better photos, When will you be putting the modules and power supply in that awesome chassis you have made?
The Small amount of hiss that can be heard from the loudpeakers can be removed by replacing the mosfet input devices with a suitable bipolar devices and changing some resistor values. I have tried this and the NX150 amplifier noise drops well into the back ground, so much so that it's is as if the amplifier is not turned on.
But it seems to loose something in the process, it is still very good mine you.
Either that it is some kind of Psychoacoustic thing going on.
Jeffry Much better photos, When will you be putting the modules and power supply in that awesome chassis you have made?
The Small amount of hiss that can be heard from the loudpeakers can be removed by replacing the mosfet input devices with a suitable bipolar devices and changing some resistor values. I have tried this and the NX150 amplifier noise drops well into the back ground, so much so that it's is as if the amplifier is not turned on.
But it seems to loose something in the process, it is still very good mine you.
Either that it is some kind of Psychoacoustic thing going on.
Matt
I have tried to reply to your last email but I keep getting bounce backs.
Did you receive it OK?
I have tried to reply to your last email but I keep getting bounce backs.
Did you receive it OK?
Hi Jeff and Mr. Holton,
I'm working on my chassis right now please give a week and i will post my wonderful NX150 Synergy.
Regards
Jopie
I'm working on my chassis right now please give a week and i will post my wonderful NX150 Synergy.
Regards
Jopie
Hi pjpoes,
at this time I'm not twist my cable but my NX150 still dead quite. I'm using teflon insulated cable.
Are you already try to change Capacitor at C4 with black gate N 100uf/50V? ...... you will get big improvement.
Cheers
Jopie
at this time I'm not twist my cable but my NX150 still dead quite. I'm using teflon insulated cable.
Are you already try to change Capacitor at C4 with black gate N 100uf/50V? ...... you will get big improvement.
Cheers
Jopie
Great Jopie!😀
When you and jeffry have completed your amplifiers I would like to feature them in a gallery on my web site....😎
When you and jeffry have completed your amplifiers I would like to feature them in a gallery on my web site....😎
Hii pjpoes
hii
in what division you change the resistor ?
input, bias or output 😀
( better learning from the expert )
even i dont have any noise in my channel
i change all the input resistor with V102
to get more detail effect 😎
for c4 si_jopie paid US$ 24 pair but
he got better voices and mid now
if you got more saving use mundorf silver in oil
change the input caps, looks what is the result
pjpoes said:
hii
in what division you change the resistor ?
input, bias or output 😀
( better learning from the expert )
even i dont have any noise in my channel
i change all the input resistor with V102
to get more detail effect 😎
for c4 si_jopie paid US$ 24 pair but
he got better voices and mid now
if you got more saving use mundorf silver in oil
change the input caps, looks what is the result
cable everywhere
hiii pjpoes
After i try another cable there are some different result
we use alpha cable (silver) and not twist and very meshed
no noise and hum there and use russian fighter silver cable
is look better (more focus) in sound produce
Do you use the same transformer in your nx and acurus amp
This trouble we fix with nuvotem / talema to replace china
transformer when we build LM 3886
I think transformer give this effect (hum or noise) very big
For the " Blacker Background " you can change the resistor
10R with Caddock, Vishay, PRP or Mills
for solder transistor try not more than 5 second and give
spare time to one and another solder hope your nx have
sound beautiful too
hiii pjpoes
After i try another cable there are some different result
we use alpha cable (silver) and not twist and very meshed
no noise and hum there and use russian fighter silver cable
is look better (more focus) in sound produce
Do you use the same transformer in your nx and acurus amp
This trouble we fix with nuvotem / talema to replace china
transformer when we build LM 3886
I think transformer give this effect (hum or noise) very big
For the " Blacker Background " you can change the resistor
10R with Caddock, Vishay, PRP or Mills
for solder transistor try not more than 5 second and give
spare time to one and another solder hope your nx have
sound beautiful too
Hi Guys
For those that would like a power output upgrade from the NX150 Synergy Amplifier Module.
I now have some Limited Edition NX400NP Synergy Amp Modules
Only 8 of these modules will be made available, So be quick!
Power Output is rated at 220 Watt into 8 ohms
More details at web site.
For those that would like a power output upgrade from the NX150 Synergy Amplifier Module.
I now have some Limited Edition NX400NP Synergy Amp Modules
Only 8 of these modules will be made available, So be quick!
Power Output is rated at 220 Watt into 8 ohms
More details at web site.
Attachments
Those Aussie Amplifier Modules above are "plug and play" replacements for the '150s ... double the effective power (with more jolts from the power supply).
Check your email Anthony, I'll take two. 😉 ...
(FYI: your email just got bounced back = bad address? ... I'll be using the one on your site.)
Check your email Anthony, I'll take two. 😉 ...
(FYI: your email just got bounced back = bad address? ... I'll be using the one on your site.)
Hi Ed
Yeap more power and they sound real nice as well. 😀
and yes a drop in replacement for the NX150 standard and synergy modules.
My email address has changed to aussieamplifiers@bigpond.com
Talk to you soon.
Yeap more power and they sound real nice as well. 😀
and yes a drop in replacement for the NX150 standard and synergy modules.
My email address has changed to aussieamplifiers@bigpond.com
Talk to you soon.
The Saint said:
Why soldering the TO-92 cases with zero lead lenght? This goes against manufacturer recomendations and hurts long term package reliability for sure. Think about thermal cycling.
The leads of the TO-264 devices are also very short and hard to bend and this may lead to alignment problems when trying to clamp them to the heatsink.
Thanks Eva
Good suggestions 🙂
I am moving more into full SMD components rather than hole through components, these days.
The NX400NL modules presented here are around 1 year old
and I had a few PCBs of these laying around so I decided to release a limited edition run of these, they perform very well
I have designed a full SMD version of this amplifier and I will be releasing it in the new year most likely in Jan 2008.
It will be the same PCB dimension only with PSU components onboard as well, so you just have to add a transformer and heat sink and you have a complete power amplifier.
Good suggestions 🙂
I am moving more into full SMD components rather than hole through components, these days.
The NX400NL modules presented here are around 1 year old
and I had a few PCBs of these laying around so I decided to release a limited edition run of these, they perform very well
I have designed a full SMD version of this amplifier and I will be releasing it in the new year most likely in Jan 2008.
It will be the same PCB dimension only with PSU components onboard as well, so you just have to add a transformer and heat sink and you have a complete power amplifier.
" .. I had a few PCBs of these laying around so I decided to release a limited edition run of these, they perform very well ..."
The interesting thing I like is the optional balanced or unbalanced input(s) ... 😉 ... plus of course it is real hard without sophisticated instruments to even measure any distortion ... 😉
The interesting thing I like is the optional balanced or unbalanced input(s) ... 😉 ... plus of course it is real hard without sophisticated instruments to even measure any distortion ... 😉
Member
Joined 2002
The Saint said:
I LOVE SMD, its very nice and cheaper. One reason why i like my Aleph Mini's, they are all SMD except the 3Watt resistors and output transistors, i have been looking to see if i can get a Smaller packaged IRF smd version, i dont need 15watts class a, maybe build something like a 5watt smd version ( all SMD ) and see how that would work.
I think AussieAmplifiers.com does a very good job with the SMD parts .. us older guys do have a vision question with the teeny tiny little caps and resistors, etc. ... so I'm buying modules from now on ... My DIY with the needle nose are over, I guess. 🙄
But as long as the stuff goes together just right and sound better and better ... 😀
The Saint's plan to make semi complete sub assemblies w/ 40,000 uF & fast diodes, etc. etc. ... is good (pictured @ http://www.aussieamplifiers.com/index3.htm) and I will probably get a setup, later.
Currently I have several very old QSC amp chassis that I will be converting using the xformers, I/O connectors, etc ... but with The Saint's modules = g'dam, man they sound good!
But as long as the stuff goes together just right and sound better and better ... 😀
The Saint's plan to make semi complete sub assemblies w/ 40,000 uF & fast diodes, etc. etc. ... is good (pictured @ http://www.aussieamplifiers.com/index3.htm) and I will probably get a setup, later.
Currently I have several very old QSC amp chassis that I will be converting using the xformers, I/O connectors, etc ... but with The Saint's modules = g'dam, man they sound good!
SMD is fragile and component values drift with mechanical stress. In power applications, I prefer to use SMD only in daughter boards because main power boards tend to be subject to bending, thermal cycling and vibration, particularly when there are heavy components like big capacitors near SMD.
anodize result
well ... this my anodized result
very good for
- 2 heatsink ( from junk market / PSU used )
- Top and bottom plate
- Rear plate 😀
But i very dissapointed for front plate result
looks like tiger mark
so you know why i build this take a looong time
Must shanding the front plate again
Must anodize in another time
and im very tired
well ... this my anodized result
very good for
- 2 heatsink ( from junk market / PSU used )
- Top and bottom plate
- Rear plate 😀
But i very dissapointed for front plate result
looks like tiger mark
so you know why i build this take a looong time
Must shanding the front plate again
Must anodize in another time
and im very tired
- Status
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