Huge voltage drop on PSU - Page 5

KatieandDad · 27th January 2013, 03:01 PM

It should be fine but you don't want to destroy a pair of nice speakers.

You can use anything, cheapo transistor radio speakers (at low volume) just to verify that it's working.

SjoerdSmits · 27th January 2013, 03:45 PM

not good.... only one side gives cracling sound and way too loud....

KatieandDad · 27th January 2013, 03:53 PM

Not good....

If you say "Way too loud" that would point me towards a faulty volume control pot.

You could swap the amplifier boards from L-R just to prove a point. If the problem stays with the same channel then the amp boards are OK.

SjoerdSmits · 27th January 2013, 03:59 PM

can not be... I use a different amp as preamp....

SjoerdSmits · 27th January 2013, 04:01 PM

Do you know the Hiraga 30Watt amp design?

KatieandDad · 27th January 2013, 04:03 PM

Try swapping the input leads.

You need to ascertain where the problem lies.

SjoerdSmits · 27th January 2013, 04:08 PM

I'll try tomorrow.... It's dinner time and it's been enough for one day :-)

Thank you so far! I hope you can help me later on?

Kind regards,
Sjoerd Smits

wintermute · 27th January 2013, 10:16 PM

SjoerdSmits go back and read post number 2 and you will now understand why I asked the question

Tony.

Quote:

Originally Posted by KatieandDad

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.

SjoerdSmits · 28th January 2013, 03:01 PM

Hi Wintermute,

Yep, get it now! Learning all the time!

Didn't know what you were trying to say with C or CRC.... :-)
Thanks!

KatieandDad · 28th January 2013, 03:34 PM

Now you need to find out if the problem is internal to your new build or not - hence swapping over the interconnects.

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27th January 2013, 03:01 PM	#41
KatieandDad diyAudio Member Join Date: Nov 2011 Location: UK	It should be fine but you don't want to destroy a pair of nice speakers. You can use anything, cheapo transistor radio speakers (at low volume) just to verify that it's working.

27th January 2013, 03:45 PM	#42
SjoerdSmits diyAudio Member Join Date: Apr 2012 Location: Zeist(Utrecht Area)	not good.... only one side gives cracling sound and way too loud....

27th January 2013, 03:53 PM	#43
KatieandDad diyAudio Member Join Date: Nov 2011 Location: UK	Not good.... If you say "Way too loud" that would point me towards a faulty volume control pot. You could swap the amplifier boards from L-R just to prove a point. If the problem stays with the same channel then the amp boards are OK.

27th January 2013, 03:59 PM	#44
SjoerdSmits diyAudio Member Join Date: Apr 2012 Location: Zeist(Utrecht Area)	can not be... I use a different amp as preamp....

27th January 2013, 04:03 PM	#46
KatieandDad diyAudio Member Join Date: Nov 2011 Location: UK	Try swapping the input leads. You need to ascertain where the problem lies.

27th January 2013, 04:08 PM	#47
SjoerdSmits diyAudio Member Join Date: Apr 2012 Location: Zeist(Utrecht Area)	I'll try tomorrow.... It's dinner time and it's been enough for one day :-) Thank you so far! I hope you can help me later on? Kind regards, Sjoerd Smits

28th January 2013, 03:01 PM	#49
SjoerdSmits diyAudio Member Join Date: Apr 2012 Location: Zeist(Utrecht Area)	Hi Wintermute, Yep, get it now! Learning all the time! Didn't know what you were trying to say with C or CRC.... :-) Thanks!

28th January 2013, 03:34 PM	#50
KatieandDad diyAudio Member Join Date: Nov 2011 Location: UK	Now you need to find out if the problem is internal to your new build or not - hence swapping over the interconnects.