Can one tell if PSU is the problem just by listening?

[iinself]

Hi,
how can on make out while listening that there is a problem with the power supply?

Thanks

 

[rayma]

how can on make out while listening that there is a problem with the power supply?

Increased hum could indicate leaky or high esr electrolytic capacitors.

 

[Mark Johnson]

I imagine the highest-confidence method would be to listen to the amp, then remove the power supply and replace it with a different supply. Then listen again. If the sound gets better (in your opinion), the supply is likely to be the cause.

 

[counter culture]

What is the problem?

 

[infinia]

^This guy has 3 or more threads open, concerning the same thing
(he's acquired an old AVR receiver and wants to build sumptin easy)
noobs don't know enough to ask the right questions, so now he's got about a half dozen of you DIYA folks twirling about. haha

correction 4 threads now and a dozen regulars contributing.

 

[infinia]

Hi,
how can on make out while listening that there is a problem with the power supply?

Thanks

Dude what's up with all these threads open at once?

rather than asking open ended type questions all over the place why don't you give us some background info 1st!

 

[iinself]

I did not know that starting a few threads simultaneously was not the proper thing to do, I can refrain from that if it as problem. My thinking was since they were different topics I would start a different thread.

 

[infinia]

short attention span is an epidemic. not against the rules no, but the public shouldn't be abused to your confusions either.

 

[iinself]

short attention span is an epidemic. not against the rules no, but the public shouldn't be abused to your confusions either.

As a senior member of thus forum, you must be having a tough time controlling these types of multiple posts, isn't it? I would suggest a simple configuration change by the forum admin on the server side to setup a rule so that a member can only start a maximum number of threads in a given time frame. This would free up your time and also stop you from guessing what the public considers abuse or not. To me they were very helpful so far, learning a lot... it is fun..

 

[DF96]

how can on make out while listening that there is a problem with the power supply?

There are PSU problems which will be audible, but most of them will produce symptoms which could be caused by something else. Listening alone may not be enough; you need measurements too.

 

[infinia]

I can suggest how I learned the basics even before I graduated HS, by reading device data sheets. then built upon that by building and measuring PS and amplifiers , but knew ohms law backwards and forward by then too. after that your questions will be more focused resulting in answers that make sense to your level.
The "public" forum and "guessing" go together don't they.

 

[iinself]

There are PSU problems which will be audible, but most of them will produce symptoms which could be caused by something else. Listening alone may not be enough; you need measurements too.

Thanks. I was just wondering if there were any tell tale signs which one could make out by just listening, something like the speaker knock test.