diyAudio (
-   Tubes / Valves (
-   -   Output Noise question (

ianc13 20th August 2007 10:19 AM

Output Noise question

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 :ashamed:

Should be quite easy to test.

Thanks again,


All times are GMT. The time now is 04:36 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2