Member
Joined 2002
your pictures are WAY WAY WAY to small to see, i thought i gave you instructions on how to set them ? you are resizing them WAY TO SMALL..!
Jase
Jase
Member
Joined 2002
Re: Hiii Jase ...
when you re-size your pictures don't go lower than 600x800 you are resizing yours at 125x150, wayyyy to small.
jeffry_widjaja said:
when you re-size your pictures don't go lower than 600x800 you are resizing yours at 125x150, wayyyy to small.
Hi Jeffry
Great work mate, well done!
😉
I am looking forward to seeing more larger photos and listening impressions from you.
keep up the great work!
Great work mate, well done!
😉 I am looking forward to seeing more larger photos and listening impressions from you.
keep up the great work!
Dear Mr. Holton,
Please Help me,
I've a pair of NX150 Synergy and PSU Three, I used :
- 500VA 2 x 40V Toroidal Transformer
- 6 x 12.000 uf/63V
I tested PSU Three and i have 56 V/Rail and then I put 10R 5W across each fuse, I adjust P1 clockwise until i get 0 ohm and I fired up my NX150 Synergy and I turn P1 until i get 1 volts BUT when i checked output stage my multimeter give me 36V
... and IRF9610 is getting very hot. I checked everything and looks fine.
Please..... give me some advise what should I do.
Many.... Many.... Thanks in advance
Regards
Jopie
Please Help me,
I've a pair of NX150 Synergy and PSU Three, I used :
- 500VA 2 x 40V Toroidal Transformer
- 6 x 12.000 uf/63V
I tested PSU Three and i have 56 V/Rail and then I put 10R 5W across each fuse, I adjust P1 clockwise until i get 0 ohm and I fired up my NX150 Synergy and I turn P1 until i get 1 volts BUT when i checked output stage my multimeter give me 36V
... and IRF9610 is getting very hot. I checked everything and looks fine.Please..... give me some advise what should I do.
Many.... Many.... Thanks in advance
Regards
Jopie
Hi Jopie
OK, first adjust the trim pot back to zero and turn the amplifier
back on.
Now measure each 1 watt Zener ZD1 and ZD2 for around 14.5-15.5 volts
There are 2 on board, one next to the IRF9610 and one next to the IRF610
If one of the zeners is showing almost zero volts then replace this zener.
If these measure OK then measure across the Gate / Source pins of each IRFD110 and IRFD9110 devices Q1, Q2, Q3, Q4.
These will vari a bit from around 3 volts to 3.5 volts each.
It is possible you might have a input Fet that is current hogging
and will need to be replaced.
Please get back to me ASAP with what you have found and I will advise you further. 🙂
I hope this helps
OK, first adjust the trim pot back to zero and turn the amplifier
back on.
Now measure each 1 watt Zener ZD1 and ZD2 for around 14.5-15.5 volts
There are 2 on board, one next to the IRF9610 and one next to the IRF610
If one of the zeners is showing almost zero volts then replace this zener.
If these measure OK then measure across the Gate / Source pins of each IRFD110 and IRFD9110 devices Q1, Q2, Q3, Q4.
These will vari a bit from around 3 volts to 3.5 volts each.
It is possible you might have a input Fet that is current hogging
and will need to be replaced.
Please get back to me ASAP with what you have found and I will advise you further. 🙂
I hope this helps
Member
Joined 2002
The Saint said:
I should also note for help for any one, NEVER connect a speaker when doing this, that will cause a big load. Never connect one till the amp is runing perfectly and no dc offset, ( or very minimal 🙂
Thanks Mr. Holton,
After I measure and this is the result :
- ZD1 and ZD2 are 14.9 V
- Q4 pin1 and pin2 are 3.2V
- Q2 pin1 and pin2 are 3.3V
- Q3 pin1 and 2 are 5.4V
- Q1 pin 1 and pin 2 are 5.3V
Should I change Q1 and Q3?
For your information :
- Q7 = 2SC2240
- Q9 - 2SA970
- R21, R22 = 150R
- R25, R26, R27, R28 = 820R
- R7, R8 = 820R
- I change C4 with Black Gate N 100uf/50V
- I change C9 and C10 with Black Gate F 100uf/100V
When I power off the amps, LED light in -V rails is very quick gone than +V rail but I pretty sure my PSU Three is fine because when try with another NX150 they are gone together.
Thanks in advance
Jopie
After I measure and this is the result :
- ZD1 and ZD2 are 14.9 V
- Q4 pin1 and pin2 are 3.2V
- Q2 pin1 and pin2 are 3.3V
- Q3 pin1 and 2 are 5.4V
- Q1 pin 1 and pin 2 are 5.3V
Should I change Q1 and Q3?
For your information :
- Q7 = 2SC2240
- Q9 - 2SA970
- R21, R22 = 150R
- R25, R26, R27, R28 = 820R
- R7, R8 = 820R
- I change C4 with Black Gate N 100uf/50V
- I change C9 and C10 with Black Gate F 100uf/100V
When I power off the amps, LED light in -V rails is very quick gone than +V rail but I pretty sure my PSU Three is fine because when try with another NX150 they are gone together.
Thanks in advance
Jopie
jleaman said:
Thansk for your advise Mr. jleaman.
For this time I,m not connect anything to my speaker.
Best Regards
Jopie
Hi Jopie
Ok can you do some more measurements for me.
What is the voltage drop across R21, 22, 23, 24?
Also R10 and R13?
They may be some problem with one of the current sources
most likely Q6 and Q7 need some further investigation.
Anyway if you can get back to me with those measurements that would be great.
Talk to you soon.
Ok can you do some more measurements for me.
What is the voltage drop across R21, 22, 23, 24?
Also R10 and R13?
They may be some problem with one of the current sources
most likely Q6 and Q7 need some further investigation.
Anyway if you can get back to me with those measurements that would be great.
Talk to you soon.
Dear Mr Holton,
I change transistor in Q6 and.... everything work fine! DC output stage only 7mV amazing!
My wonderful NX150 Synergy is ALIVE now.. and I very happy with this.
- Thanks to my Lord, because You give me a change to have this wonderful power amps.
- Thank you very much Mr. Holton for your support.
- Thanks to my friend Bonie Bong for your help
- and Thanks to you Jeff.... I remember when you push me so hard to try this...ha..ha..
Can you beat my power amps Jeff? ha...ha....
To everyone want to build power amps, I'm strongly... strongly... recommended NX150 Synergy to try, you will not disappointed.
Jeff, can i post my NX150 into your thread? maybe your thread should be official thread NX150.🙂
Cheers
Jopie
I change transistor in Q6 and.... everything work fine! DC output stage only 7mV amazing!
My wonderful NX150 Synergy is ALIVE now.. and I very happy with this.
- Thanks to my Lord, because You give me a change to have this wonderful power amps.
- Thank you very much Mr. Holton for your support.
- Thanks to my friend Bonie Bong for your help
- and Thanks to you Jeff.... I remember when you push me so hard to try this...ha..ha..
Can you beat my power amps Jeff? ha...ha....
To everyone want to build power amps, I'm strongly... strongly... recommended NX150 Synergy to try, you will not disappointed.
Jeff, can i post my NX150 into your thread? maybe your thread should be official thread NX150.🙂
Cheers
Jopie
Hi Jopie
Excellent mate!
I am very happy you have found the problem.
I am sure Jeffry will be more than happy for you to post your
NX150 amplifier photos in this thread. 😉
I will look forward to seeing both jeffry's and your NX150 Synergy
soon....
Excellent mate!
I am very happy you have found the problem.
I am sure Jeffry will be more than happy for you to post your
NX150 amplifier photos in this thread. 😉
I will look forward to seeing both jeffry's and your NX150 Synergy
soon....
Boys and Girls dont try this at home
Grrr ! ! !
i will make it AEH Signature Series then 😀
Everybody can attach his NX 150 picture here Jopie
maybe something we can learn from other project
oh yes you must help me to attach my picture
Oh yes The NX150 sound is very wonderful
I will try Mommy Blue from Paul Mauriat next
when i try "wanna be with you" from Mandy More
her voice looks very sexy 😀
si_jopie0382 said:
Grrr ! ! !
i will make it AEH Signature Series then 😀 Everybody can attach his NX 150 picture here Jopie
maybe something we can learn from other project
oh yes you must help me to attach my picture
Oh yes The NX150 sound is very wonderful
I will try Mommy Blue from Paul Mauriat next
when i try "wanna be with you" from Mandy More
her voice looks very sexy 😀
Hi Jeffry
What an excellent idea AEH Signature series!
that could be the name of my next amplifier series 😉
Regarding your photos try using one of the many photo editors
available on the internet, If you are using Nero burning software
the lastest version has quite a good photo editor and keep the photos as Jpegs and a resolution of around 640 x 480 should keep them at or below the 100kb posting limit.
I hope this helps...
What an excellent idea AEH Signature series!
that could be the name of my next amplifier series 😉
Regarding your photos try using one of the many photo editors
available on the internet, If you are using Nero burning software
the lastest version has quite a good photo editor and keep the photos as Jpegs and a resolution of around 640 x 480 should keep them at or below the 100kb posting limit.
I hope this helps...
c o n f i d e n t i a l
It is still confidential for AEH signature series
Mr Holton 😀 but i believe ..... excellent
Thank for photo editor info too 😱
Anthony how long you research this synergy ?
It is sound so beautiful 😎
I not try in my TOTEM yet but the sounds have a lot
of improvment when i hear in same Speaker
It is still confidential for AEH signature series
Mr Holton 😀 but i believe ..... excellent
Thank for photo editor info too 😱
Anthony how long you research this synergy ?
It is sound so beautiful 😎
I not try in my TOTEM yet but the sounds have a lot
of improvment when i hear in same Speaker
Hi Jeffry
Thanks for your kind comments...
The synergy project took around 2-3 months to complete.
I have made some futher improvements since then and I am continuing to strive for excellence in sound quality and engineering for the NX series range of amplifier modules.
You can see my latest design on my web site.
I look forward to you and Jopie posting your amplifiers here soon...
Thanks for your kind comments...
The synergy project took around 2-3 months to complete.
I have made some futher improvements since then and I am continuing to strive for excellence in sound quality and engineering for the NX series range of amplifier modules.
You can see my latest design on my web site.
I look forward to you and Jopie posting your amplifiers here soon...
Well I'm glad to see that this is still coming along. I was so upset with myself for taking as long as I did to complete my NX150's into their now, what I call, prototype stage, but seeing how long Jeff is taking, I don't feel so bad. Maybe its normal for us to take months if not years to finish a project like this completely.
I still need to change out the input capacitors in my amps to see how that effects sound, but I can say this, to anyone who is curious, power supply makes a very noticeable difference in my opinion. The ESR of my power supply caps is 8 milliohms per cap, and I was running my power supply with one 22mf cap, then a 12 millihenry inductor, and then one more 22mf cap. It was just meant to get things going, and given that it would power 3 amp modules, was not a good long term solution. I finaly had time to add another 22mf cap in the C2 position of that power supply. I now have 44,000 uf's of capacitance in the C2 position, and a .004 ohm esr. I know that 44mf's doesn't sound like much, but keep in mind that, with the inductors, thats making for a pretty low bit of noise, much lower than even 500,000 uf's of capacitance alone could match. Solid state designs don't normaly care as much, but I think it still matters to a point, and I think the inductor makes a good energy storage device as well. That and I wanted to try something different. I thought the amp sounded a bit strident and weak in the bass, and I felt that the soundstage collapsed durring dynamic peaks. Measuring the voltage during peaks didn't show enough of a voltage drop to imply an undersized power supply, and loading it down with resistors also did not show much drop, but still, this change make a pretty drastic difference. I think the sound improved greatly, with better dynamics, better bass, and a more cohesive soundstage durring dynamic moments.
I purchased the 63mf and 33mf caps from Hitachi as well, and so my goal is to change the C1 position to have 44mf, ie two caps, then the inductors, and then have between 80 and 100mf's at the C2 position. If I ever get the space and funds, changing to monoblocks would probably be best, but man enclosures are expensive. I have the parts for the power supply, just not the enclosure space. Another thing I want to try is using a better regulated LC design. I've read that running an amp at a lower voltage can improve sound. I've also noticed that some people feel that a lot of camps like the chip amps sound a lot better at 12-15 volt rails, than at the normal 25-30 volt rails. I'm running my amp with 65 volt rails, and with 2kva of transformer, so even under dynamic peaks the amps get plenty of power. Changing to an LC would lower the rails to 35 volts or so, probably drasticly lowering power, but possibly improving sound.
I still need to change out the input capacitors in my amps to see how that effects sound, but I can say this, to anyone who is curious, power supply makes a very noticeable difference in my opinion. The ESR of my power supply caps is 8 milliohms per cap, and I was running my power supply with one 22mf cap, then a 12 millihenry inductor, and then one more 22mf cap. It was just meant to get things going, and given that it would power 3 amp modules, was not a good long term solution. I finaly had time to add another 22mf cap in the C2 position of that power supply. I now have 44,000 uf's of capacitance in the C2 position, and a .004 ohm esr. I know that 44mf's doesn't sound like much, but keep in mind that, with the inductors, thats making for a pretty low bit of noise, much lower than even 500,000 uf's of capacitance alone could match. Solid state designs don't normaly care as much, but I think it still matters to a point, and I think the inductor makes a good energy storage device as well. That and I wanted to try something different. I thought the amp sounded a bit strident and weak in the bass, and I felt that the soundstage collapsed durring dynamic peaks. Measuring the voltage during peaks didn't show enough of a voltage drop to imply an undersized power supply, and loading it down with resistors also did not show much drop, but still, this change make a pretty drastic difference. I think the sound improved greatly, with better dynamics, better bass, and a more cohesive soundstage durring dynamic moments.
I purchased the 63mf and 33mf caps from Hitachi as well, and so my goal is to change the C1 position to have 44mf, ie two caps, then the inductors, and then have between 80 and 100mf's at the C2 position. If I ever get the space and funds, changing to monoblocks would probably be best, but man enclosures are expensive. I have the parts for the power supply, just not the enclosure space. Another thing I want to try is using a better regulated LC design. I've read that running an amp at a lower voltage can improve sound. I've also noticed that some people feel that a lot of camps like the chip amps sound a lot better at 12-15 volt rails, than at the normal 25-30 volt rails. I'm running my amp with 65 volt rails, and with 2kva of transformer, so even under dynamic peaks the amps get plenty of power. Changing to an LC would lower the rails to 35 volts or so, probably drasticly lowering power, but possibly improving sound.
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