BOZ & volume control...

darkstar666 · 21st March 2005, 10:06 PM

hi to all! back again with my bride of Zen!

i'don't manage to find a solution to the problem regarding the volume control at the output of Bride of Zen...

first, i tried using a dual 5k log potentiometer.. but the result is wasn't good. the difference between channel impedances (about 100-200 ohms, depending the position of the knob) result in a BIG differnce between the channels. one playing very loud, and the other almost silent.

so i mounted a 10 k linear pot at the input, to have a balance control between the channels, but at every volume change, i have to rebalance the system...

tonight i've just mounted a 'Fake' log pot using a 10k linear one in parallel with 2x 1K8 ohm 1% precision resistors, but the difference between channels rises to a maximum of 1.6 Kohms!

i just hope the ratio between channel impedances would be constant...

anyone solved this problem, and if so, how?

DarkstaR

EANDERS · 24th March 2005, 06:40 AM

Greetings from California darkstar666,
I am also building a bosoz. as far as the volume control selection, try looking up the thread from skaara titled " balanced volume control"
most of your questions should be answered there.
I will be trying a 6 gang 10k precision pot I got from a local surplus electronics store. most seem to like the stepped attenuator.
I would include a link to skaara's thread but I have not figured that one out yet. Good luck with your project,
eanders

JEKYLL · 24th March 2005, 10:07 PM

balanced volume control

darkstar666 · 25th March 2005, 11:51 AM

thank you a lot!

i'think to build the volumer control using linear 'faked' conductive plastic potentiometers. as i've experimented, the difference between channels remains quite constant over the whole turning of the pot..

DarkstaR

21st March 2005, 10:06 PM	#1
darkstar666 diyAudio Member Join Date: Oct 2004	BOZ & volume control... hi to all! back again with my bride of Zen! i'don't manage to find a solution to the problem regarding the volume control at the output of Bride of Zen... first, i tried using a dual 5k log potentiometer.. but the result is wasn't good. the difference between channel impedances (about 100-200 ohms, depending the position of the knob) result in a BIG differnce between the channels. one playing very loud, and the other almost silent. so i mounted a 10 k linear pot at the input, to have a balance control between the channels, but at every volume change, i have to rebalance the system... tonight i've just mounted a 'Fake' log pot using a 10k linear one in parallel with 2x 1K8 ohm 1% precision resistors, but the difference between channels rises to a maximum of 1.6 Kohms! i just hope the ratio between channel impedances would be constant... anyone solved this problem, and if so, how? DarkstaR

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24th March 2005, 06:40 AM	#2
EANDERS diyAudio Member Join Date: Feb 2005 Location: Northern California	Greetings from California darkstar666, I am also building a bosoz. as far as the volume control selection, try looking up the thread from skaara titled " balanced volume control" most of your questions should be answered there. I will be trying a 6 gang 10k precision pot I got from a local surplus electronics store. most seem to like the stepped attenuator. I would include a link to skaara's thread but I have not figured that one out yet. Good luck with your project, eanders

24th March 2005, 10:07 PM	#3
JEKYLL diyAudio Member Join Date: Jan 2004 Location: FRANCE	balanced volume control

25th March 2005, 11:51 AM	#4
darkstar666 diyAudio Member Join Date: Oct 2004	thank you a lot! i'think to build the volumer control using linear 'faked' conductive plastic potentiometers. as i've experimented, the difference between channels remains quite constant over the whole turning of the pot.. DarkstaR

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