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-   -   Zen ZV9 Question (http://www.diyaudio.com/forums/pass-labs/90257-zen-zv9-question.html)

Albertone 13th November 2006 05:09 PM

Zen ZV9 Question
 
Hi!
I am building a Zen ZV9, so I am searching for a couple of 25k potentiometers. Nelson says in his pdf that all resistors are 1/4 W, so should I use a 1/4 watt potentiometer or can I use a pot with more power??

Nelson Pass 13th November 2006 06:05 PM

You can use any pot you like - it isn't going to conduct
signal, and of course you can substitute resistor values
until you get what you want, which is an output DC
voltage at 1/2 the regulated rail.

:cool:

Albertone 14th November 2006 12:41 PM

What an honor!! The Mighty Nelson Pass in person!!! :bigeyes: :bigeyes:
Forgive me for the idiot question, but I'm a newbie....
Thank you very much.. and thank you for this great amplifier!!!

Albertone 14th November 2006 12:50 PM

Sorry Nelson, but can I use this pot with the default resistor values?? (I absolutely don't want to make any error in the building!!)

Potentiometer

Alain Dupont 14th November 2006 04:17 PM

Albertone,

http://www.digikey.com

Ref# 490-2979-ND

Murata TRIMPOT CERM 25K OHM 12TRN TOP 250mW

http://rocky.digikey.com/WebLib/Mura...7%20series.pdf

As a good example...

Alain.

Albertone 14th November 2006 04:31 PM

So the one I selected won't work?? Because I'd like to mount a stereo one...

Alain Dupont 14th November 2006 04:40 PM

Albertone,

I can't reach the one you did choose, the link is not working

could you please give the reference ?

Alain.

Albertone 15th November 2006 11:57 AM

Of course! Here's the Digikey part number:

KKA2531S28-ND

Alain Dupont 15th November 2006 12:19 PM

Albertone,

Are we speaking of P1 the pot in the lower left of the schematic ex Fig #6

The point is each channel has to be adjusted separately
and the current in this pot is < 0.75 mA

so why not ; but quite overkill....
{plus to find the sweet pot of the second channel you'll have to add a separate
pot on one channel, not really easy}

And a 12, 15 or 20 turns will be much more easy to adjust !!!

Alain.

Albertone 15th November 2006 01:37 PM

Yes the P1... Isn't it the pot for adjusting the audio volume?
So... if i mount one per channel, I have to adjust the volume for each channel separately, right?? This doesn't look very nice....


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