Can we have comparable test results for a linear PSU+Amplifier combination, so that we can reach our own conclusion on which compromises we want to accept?
You've read the previous posts, or come with the usual blah blah ..?
the failure to restart it happens after I changed the connection of a resistor (I did not notice the defect using the remote control, which is perfect) (I have not tried to unplug the AC cable after last modify... I'm sorry)
yes, you and some other it will take 10 years to create this compact SMPS ..just have bad design 😛
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You released an SMPS specifically to work with this amplifier.
The PSU as supplied fails to operate properly.
Do not try to excuse that bad operation.
You designed it badly for the duty you supplied it for.
The PSU as supplied fails to operate properly.
Do not try to excuse that bad operation.
You designed it badly for the duty you supplied it for.
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BTW,
I know my limitations.
Just one of many is designing SMPS.
I will never try to compete with you in designing any SMPS.
I know my limitations.
Just one of many is designing SMPS.
I will never try to compete with you in designing any SMPS.
Please Owen, it is very simple replace resistor connection in first smps i sended. switch on and disconnect ac cable. you see led (it reflect voltage in primary side) switch off clean (no re-start occur).
thank
regards
thank
regards
I not release this smps..i sended to Owen for adjust it on this amplifier.
this dps-400 creted in 2005, usefull for D class, then problem is in startup with bias current >150mA related this amplifier.
Obvius that have adeguate performances even it is limited to 150w amp.
and is not comparable with other smps for...lamps
Do not make excuses.
You supplied the SMPS for a specific amplifier.
The test result is abominable.
You supplied the SMPS for a specific amplifier.
The test result is abominable.
AndrewT:
AP2 is correct in stating that I am working with an engineering sample, and in all fairness to him, the previous iteration of the DPS-400 he sent me did not have the shut-down problem and did manage to start-up with 400mA of bias.
It seems these are the two biggest issues for people, so in the interest of moving this along I'll change the resistors on the board when AP2 sends instructions and I'll re-test to verify that the start-up and shut-down both work properly.
AP2:
Please send me very specific instructions on exactly what to change, and I'll take a crack at it today providing I have the parts on hand.
Regards,
Owen
AP2 is correct in stating that I am working with an engineering sample, and in all fairness to him, the previous iteration of the DPS-400 he sent me did not have the shut-down problem and did manage to start-up with 400mA of bias.
It seems these are the two biggest issues for people, so in the interest of moving this along I'll change the resistors on the board when AP2 sends instructions and I'll re-test to verify that the start-up and shut-down both work properly.
AP2:
Please send me very specific instructions on exactly what to change, and I'll take a crack at it today providing I have the parts on hand.
Regards,
Owen
Sorry, what are the tests abominable?
I have no interest except to convince you. just to prove your pointless blah blah ... I'm not wrong in this project (create in 2005,not now).
I really hope Owen can prove that the defect is not part of this original SMPS
Please, in old dps-400, you have solder an resistor on bottom of pcb. remove it and assemble at original in top of pcb (see top layer white). value is 100-150K and try.
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Andrew you can read, Owen did not recommend the PSU, he showed measurements of it and highlighted these issues had to be solved for it to be useable and specifically said that AP2 had a fix, but he was stepping aside from supplying the PSU as he does not have more time for more testing. He presented the measurements because many people asked for them.
He highlighted these issues point by point; mentioned good performance within these limits with these caveats. if these issues can be solved I will most likely buy the supply or DPS500 as if they provide better performance thats good enough for me and I will use 400 for sub
read properly before making your usual provocative and extremely negative statements please. I was talking to my friend today and we agreed that neither of us can remember positive feedback from you ever. you do often help find problems and sometimes in a productive manner, but positive feedback does not seem to be part of your makeup and its the criticism that seems to be what you enjoy, not solving the problem for people.
this is how it appears, if you feel this is unfair, I suggest you have a look at it. I repeat I have seen you help people, but this does not seem to be the motivation
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Nevertheless a comparison with a high quality linear supply might be interesting; a high quality supply is what this amp deserves, right?
One thing for sure (and also check the ncore thread where quite some guys don't succeed in connecting an amp board and smps succesfully): linear supplies are easier to work with (and most likely more reliable long term).
One thing for sure (and also check the ncore thread where quite some guys don't succeed in connecting an amp board and smps succesfully): linear supplies are easier to work with (and most likely more reliable long term).
I cannot recall saying that Opc, the amplifier designer, recommended this, or any SMPS. I do recall seeing (not saying) that Opc wanted to look at various PSU options.
Maybe I said something that was ambiguous and maybe another interpretation could arrive at "Andrew said that OPC recommended this particular SMPS". If so then please point to the offending statement and I will be glad to make it unambiguous.
What I can see is that the amp designer has listed a number of issues. One of which is and I deliberately repeat the word an abomination. That SMPS should never have released for that amplifier. This is not Opc's fault. He simply tested and reported the results.
Maybe I said something that was ambiguous and maybe another interpretation could arrive at "Andrew said that OPC recommended this particular SMPS". If so then please point to the offending statement and I will be glad to make it unambiguous.
What I can see is that the amp designer has listed a number of issues. One of which is and I deliberately repeat the word an abomination. That SMPS should never have released for that amplifier. This is not Opc's fault. He simply tested and reported the results.
Yes, and thousands of DIYers have managed to install and blow up caps by installing them backwards even on clearly marked PCBs, so I guess we should avoid the use of capacitors altogether. 🙄
Hi,
Just a time I prepare video on new's.
1) solved startup stable up to 400mA
2) solved intervent of UVLO (as in original dps-400 before modify)
now, if disconnect ac cable (while running), smps stop fast as remote control. (immediately).
a this point (if any want) this smps have performances adeguate a this amp.
especially in the case of multi amps. (absolute absence of beat frequency) or other noise-induced.
With the limit of power is always better to have a psu for amp. and not a very big one SMPS for 2 or 4 amps. this is wrong,independant of smps, especially with SMPS developed for turn-on lights .. copied by the Chinese.
just for low power in range middle-tweeter (becouse not have dominant low frequency) contrary to what some think, is very appropriate given the DPS-400, as shown by the monitor rail, it have good response, near a regulated power supply in case of 8R .
I will not convince anybody, I said the right things belonging to the audio technology, and not based on blah blah ...
Regards
Just a time I prepare video on new's.
1) solved startup stable up to 400mA
2) solved intervent of UVLO (as in original dps-400 before modify)
now, if disconnect ac cable (while running), smps stop fast as remote control. (immediately).
a this point (if any want) this smps have performances adeguate a this amp.
especially in the case of multi amps. (absolute absence of beat frequency) or other noise-induced.
With the limit of power is always better to have a psu for amp. and not a very big one SMPS for 2 or 4 amps. this is wrong,independant of smps, especially with SMPS developed for turn-on lights .. copied by the Chinese.
just for low power in range middle-tweeter (becouse not have dominant low frequency) contrary to what some think, is very appropriate given the DPS-400, as shown by the monitor rail, it have good response, near a regulated power supply in case of 8R .
I will not convince anybody, I said the right things belonging to the audio technology, and not based on blah blah ...
Regards
Correct:
just enough time to make a video.
1) solved startup stable up to 400mA
2) solved intervention of the UVLO (as original dps-400 before modify)
now, if AC cable disconnected (while running), smps stop fast as remote control. (immediately).
a this point (if any want) this smps have performances adeguate a this amp.
especially in the case of multi amps (with multi smps). (absolute absence of beat frequency or other noise-induced).
Is always better to have a psu for amp. and not a very big one SMPS for 2 or 4 amps. this is wrong, specially with smps developed to light bulbs copied by the Chinese.
just for low power in range MW-TW (becouse not have dominant low frequency that intermodulate) contrary to what some think, is very appropriate given the DPS-400, as shown by the monitor rail, it have good response, near a regulated power supply .
I will not convince anybody, I said the right things belonging to the audio technology, and not based on bla bla ...(bla= word without sense)
Regards
just enough time to make a video.
1) solved startup stable up to 400mA
2) solved intervention of the UVLO (as original dps-400 before modify)
now, if AC cable disconnected (while running), smps stop fast as remote control. (immediately).
a this point (if any want) this smps have performances adeguate a this amp.
especially in the case of multi amps (with multi smps). (absolute absence of beat frequency or other noise-induced).
Is always better to have a psu for amp. and not a very big one SMPS for 2 or 4 amps. this is wrong, specially with smps developed to light bulbs copied by the Chinese.
just for low power in range MW-TW (becouse not have dominant low frequency that intermodulate) contrary to what some think, is very appropriate given the DPS-400, as shown by the monitor rail, it have good response, near a regulated power supply .
I will not convince anybody, I said the right things belonging to the audio technology, and not based on bla bla ...(bla= word without sense)
Regards