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Old 13th November 2006, 05:09 PM   #1
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Default 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??
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Old 13th November 2006, 06:05 PM   #2
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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.

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Old 14th November 2006, 12:41 PM   #3
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What an honor!! The Mighty Nelson Pass in person!!!
Forgive me for the idiot question, but I'm a newbie....
Thank you very much.. and thank you for this great amplifier!!!
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Old 14th November 2006, 12:50 PM   #4
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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
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Old 14th November 2006, 04:17 PM   #5
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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.
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Old 14th November 2006, 04:31 PM   #6
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So the one I selected won't work?? Because I'd like to mount a stereo one...
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Old 14th November 2006, 04:40 PM   #7
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I can't reach the one you did choose, the link is not working

could you please give the reference ?

Alain.
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Old 15th November 2006, 11:57 AM   #8
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Of course! Here's the Digikey part number:

KKA2531S28-ND
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Old 15th November 2006, 12:19 PM   #9
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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.
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Old 15th November 2006, 01:37 PM   #10
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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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