SjoerdSmits go back and read post number 2 and you will now understand why I asked the question
Tony.
Tony.
All the resistor across X3 and X4 is doing is acting as part of a CRC filter to reduce ripple slightly.
For testing you can just add a shorting link in place of X3 and another in place of X4.
Once you are happy it is working you can consider what value of resistor you would like to try in those positions.
The current I am referring to is the DC current drawn by the amplifiers from the secondary side of the supply.
Hi KatieandDad,
I measured all the components on both amps. They both measured OK so I got confused. I was expecting to find defective transistors at least. But all seems to be ok using the diode test..... I'm not saying that this test is 100% conclusive, but both the left and right amp measure exactly the same on all components.
So I browsed the internet and found this:
How to Measure DC Offset: 5 steps - wikiHow
Don't know for sure yet, but it would explain the shabby sound on only one channel. My speaker protection unit could have been cutting off the left amp while stil running the right amp. But if the DC offset is very high, that could result in crackling sound couln't it?
I'll try the methode described in that article tomorrow I'll let you know how it turnes out.
Kind regards,
Sjoerd Smits
I measured all the components on both amps. They both measured OK so I got confused. I was expecting to find defective transistors at least. But all seems to be ok using the diode test..... I'm not saying that this test is 100% conclusive, but both the left and right amp measure exactly the same on all components.
So I browsed the internet and found this:
How to Measure DC Offset: 5 steps - wikiHow
Don't know for sure yet, but it would explain the shabby sound on only one channel. My speaker protection unit could have been cutting off the left amp while stil running the right amp. But if the DC offset is very high, that could result in crackling sound couln't it?
I'll try the methode described in that article tomorrow I'll let you know how it turnes out.
Kind regards,
Sjoerd Smits
Hi Wintermute,
Yep, get it now! Learning all the time!
Didn't know what you were trying to say with C or CRC....
Thanks!
Yes I realized that once Katie and Dad nailed it down Easy to forget sometimes that some of the stuff we now take for granted we would have said "whats a CRC" ourselves when starting out!
Tony.
Hi There again!
I have a strange problem. It seems that my power supply is having trouble but I can't seem to find what it is. here's what happened:
I accidently swapped pos and neg of the amplifiers. This resulted in a "boom" ofcourse. So I replaced the amps and the diodes on the PSU.
Somehow the new amps do not work. I measured 10VAC on the secondary side of the PSU and the expected 35VCD on the same side. How is this possible? And can this be the reason the amps will not work?
Please help! I'm going out of my mind
Kind regards, Sjoerd
I have a strange problem. It seems that my power supply is having trouble but I can't seem to find what it is. here's what happened:
I accidently swapped pos and neg of the amplifiers. This resulted in a "boom" ofcourse. So I replaced the amps and the diodes on the PSU.
Somehow the new amps do not work. I measured 10VAC on the secondary side of the PSU and the expected 35VCD on the same side. How is this possible? And can this be the reason the amps will not work?
Please help! I'm going out of my mind
Kind regards, Sjoerd
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