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-   -   value on volum pot? (http://www.diyaudio.com/forums/tubelab/188616-value-volum-pot.html)

Green77 8th May 2011 09:52 AM

value on volum pot?
 
Hi all.

I've put in a 100 K alps volum pot in my TSE. Work well but i need to have the volum at 12 o´clock to hear anything.. and if i want it loud i have it at 5 o´clock..

Can i change the value of the pot so i don't need to have it so high? 50K? 25K?

Thanks //Daniel

Evenharmonics 8th May 2011 02:55 PM

Quote:

Originally Posted by Green77 (Post 2565163)
and if i want it loud i have it at 5 o´clock..

You may end up clipping the amp (not good). How efficient are your speakers? If it's below 95db, you may want to get something more efficient for TSE or keep it at lower volume level.

Turning up the pot would be same thing as having lower value volume pot. It won't solve the issue you are having.

jan.didden 8th May 2011 03:06 PM

Quote:

Originally Posted by Green77 (Post 2565163)
Hi all.

I've put in a 100 K alps volum pot in my TSE. Work well but i need to have the volum at 12 o´clock to hear anything.. and if i want it loud i have it at 5 o´clock..

Can i change the value of the pot so i don't need to have it so high? 50K? 25K?

Thanks //Daniel

A vol pot works by tapping off a portion of the full signal and sending it to your amp. A hi value pot at 12 o'clock taps of the same fraction as a low value pot at 12 o'clock, so this makes no difference in your case.

The problem that you are having is that either your source doesn't give off enough signal, or the amp has to low gain, or the speakers are very inefficient. You need to figure out which it is before you can select a solution to it.

jan didden

scott17 8th May 2011 04:26 PM

An audio taper pot wired for reverse rotation would do this.

Green77 8th May 2011 06:24 PM

ok, thanks for your answers :)

I use my computer as a source.. I have an external usb sound card (BEHRINGER UCA222). Don't know if it give off enough signal..anybody know?
And i'm about to buy new speakers :) have looked at monitor audio (90dB/W) and AudioVector (91dB/W).. maybe to hard to drive?

Thanks //Daniel

scott17 8th May 2011 07:39 PM

Quote:

Originally Posted by Green77 (Post 2565514)
ok, thanks for your answers :)

I use my computer as a source.. I have an external usb sound card (BEHRINGER UCA222). Don't know if it give off enough signal..anybody know?
And i'm about to buy new speakers :) have looked at monitor audio (90dB/W) and AudioVector (91dB/W).. maybe to hard to drive?

Thanks //Daniel

Did you check to see if the vol control was wired in reverse?

Evenharmonics 8th May 2011 11:20 PM

Quote:

Originally Posted by Green77 (Post 2565514)
Don't know if it give off enough signal..anybody know?

If you have multimeter, measure the AC voltage at the analog output of the sound card when playing 1KHz sine wave and let us know.

Quote:

And i'm about to buy new speakers :) have looked at monitor audio (90dB/W) and AudioVector (91dB/W).. maybe to hard to drive?
Take a look at these brands.
Gedlee
Parker Audio

Green77 9th May 2011 05:10 AM

Ok, i'm at work now but i will measure it tonight.
If it was wired in reverse shouldn't max be at left (wrong way) then?

scott17 9th May 2011 11:51 AM

Quote:

Originally Posted by Green77 (Post 2565985)
Ok, i'm at work now but i will measure it tonight.
If it was wired in reverse shouldn't max be at left (wrong way) then?

I'm not sure where my brain was when I suggested that, forget I said anything.

rknize 10th May 2011 04:32 AM

Do you have the pot wired properly? The wiper should be on the amp side and the source on one side of the element, opposite from the signal ground.


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