| Albertone |
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 |
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 |
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 |
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 |
|
|
| Albertone |
| So the one I selected won't work?? Because I'd like to mount a stereo one... |
|
|
| Alain Dupont |
Albertone,
I can't reach the one you did choose, the link is not working
could you please give the reference ?
Alain. |
|
|
| Albertone |
Of course! Here's the Digikey part number:
KKA2531S28-ND |
|
|
| Alain Dupont |
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 |
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.... |
|
|
| Babowana |
No.
P1 is to adjust the output DC voltage, which is to be 1/2 the regulated V.
As Papa already said . . . post#2 . . . |
|
|
| Albertone |
| Sorry.. I didn't read well... But how can I adjust the audio volume if P1 doesn't do this?? |
|
|
| paulb |
| You need a preamplifier, or just a volume control potentiometer in front of the ZV9. |
|
|
| Albertone |
| Ok, now I understand how the circuit works!! Thank you!! :D |
|
|
| Babowana |
| quote: | Originally posted by Albertone
Ok, now I understand
:D |
You must be a guy who always sleep in the classroom . . .
Don't make too much watermark on books :D |
|
|
|
