Output Noise question

ianc13 · 20th August 2007, 10:19 AM

Hi,

I was wondering whether someone could give me some guidance - I am testing the first of my C3G/PX25 DRD monoblocks and currently have around 2.5-3.0 mV of hum on the output.

This level I can hear through my speakers from my sitting position.

There are a number of bits and pieces that I still need to implement in this monoblock, like screening the input wire and sorting out the star ground for the CLCLC supply.

The question that I have is what is a suitable noise level to aim for? 1.0mV? My speakers are around 97db/M.

Thanks in advance, Ian

AndreasS · 20th August 2007, 10:33 AM

Hi Ian,

Take a signal with 100 Hz to your loudspeaker terminals and decrease the signal to the level of your choice...

Regards Andreas

ianc13 · 20th August 2007, 10:48 AM

Thanks Andreas,

I never even thought of that

Should be quite easy to test.

Thanks again,

Ian

20th August 2007, 10:19 AM	#1
ianc13 diyAudio Member Join Date: Oct 2005	Output Noise question Hi, I was wondering whether someone could give me some guidance - I am testing the first of my C3G/PX25 DRD monoblocks and currently have around 2.5-3.0 mV of hum on the output. This level I can hear through my speakers from my sitting position. There are a number of bits and pieces that I still need to implement in this monoblock, like screening the input wire and sorting out the star ground for the CLCLC supply. The question that I have is what is a suitable noise level to aim for? 1.0mV? My speakers are around 97db/M. Thanks in advance, Ian

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Noise problem on TDA1541A output	Peter K	Digital Source	55	30th January 2010 09:22 PM
TEac T1 output noise	bk.bas	Digital Source	2	22nd July 2007 04:53 PM
Noise on Aikido output	Andypairo	Tubes / Valves	35	7th January 2007 09:01 AM
Acceptable noise level at amp output	martinv	Solid State	5	23rd December 2003 10:22 PM
noise from new output transistors	peter pkcc	Solid State	7	31st May 2001 04:05 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

20th August 2007, 10:33 AM	#2
AndreasS diyAudio Member Join Date: May 2005 Location: near Duesseldorf	Hi Ian, Take a signal with 100 Hz to your loudspeaker terminals and decrease the signal to the level of your choice... Regards Andreas

20th August 2007, 10:48 AM	#3
ianc13 diyAudio Member Join Date: Oct 2005	Thanks Andreas, I never even thought of that Should be quite easy to test. Thanks again, Ian

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)