Where to get balance controls?

Glowbug · 25th October 2006, 11:18 AM

My apologies if this is in the wrong place.

I'm collecting the parts I need for a TVC project, and the only real stumbling block I have is trying to find a stereo balance control for it...I don't need anything made from ultra-pure silver or anything fancy, just something with a center detent that will work well. I need to have the part beforehand so I know what size hole needs to be drilled for it...

Thanks in advance.

EchoWars · 25th October 2006, 12:46 PM

Michael Percy Audio sells a Noble and an Alps balance pot. I do not know if either is detented.

Minion · 25th October 2006, 06:08 PM

You can use pretty much any Linear Pot in some circuits for a Ballance controll.....

With the Wiper in the Middle Position the resistance on either side of the Pot is equal but when you adjust the wiper in one direction the Resistance increases on one side of the Pot and the other side decreases in a linear manner which makes it suitable for a Ballance controll....

So you would connect one Channel to one side of the Pot and the Wiper and the other channel to the other side of the pot and the wiper...a Dual Ganged linear pot would also work.....

I have seen lots of center dented Pots for sale on e-bay so that might also be a Place to look....

Cheers

dhaen · 25th October 2006, 06:33 PM

If you are going to the expense of a TVC, then a variable resistor balance pot is a travesty! Sorry.

Instead, consider using a second rotary switch to vary the tap of one channel vs the other. This assumes some reasonably small steps being available on the transformer of course. If not, then use the switch with some precision resistors. Or, just use precision resistors between taps to increase the resolution if it is not quite enough.
Howzat?

EchoWars · 26th October 2006, 03:47 AM

Quote:

Originally posted by dhaen
If you are going to the expense of a TVC, then a variable resistor balance pot is a travesty! Sorry.

Sorry if my suggestion didn't meet your standards. I have no idea what a TVC is.

Edit: I found TVC Communications, Total Video Converter, Traditional Values Coalition, Tanana Valley Campus, and lastly, I found Transformer Volume Control. Perhaps the original poster ought to define his terms and help others help him.

dhaen · 26th October 2006, 08:06 AM

Echowars, my point was that having spent (probably) in the order of $300 for a TVC to avoid the shortcomings of a potentiometer as a volume control, it would be counterproductive to then add one in the form of a balance control into the signal path.

Yesterday wasn't one of my best days for discretion...

25th October 2006, 11:18 AM	#1
Glowbug diyAudio Member Join Date: Feb 2006 Location: Hillsborough, NC/McLean, VA	Where to get balance controls? My apologies if this is in the wrong place. I'm collecting the parts I need for a TVC project, and the only real stumbling block I have is trying to find a stereo balance control for it...I don't need anything made from ultra-pure silver or anything fancy, just something with a center detent that will work well. I need to have the part beforehand so I know what size hole needs to be drilled for it... Thanks in advance. __________________ Jim J.

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25th October 2006, 12:46 PM	#2
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	Michael Percy Audio sells a Noble and an Alps balance pot. I do not know if either is detented.

25th October 2006, 06:08 PM	#3
Minion diyAudio Member Join Date: May 2006	You can use pretty much any Linear Pot in some circuits for a Ballance controll..... With the Wiper in the Middle Position the resistance on either side of the Pot is equal but when you adjust the wiper in one direction the Resistance increases on one side of the Pot and the other side decreases in a linear manner which makes it suitable for a Ballance controll.... So you would connect one Channel to one side of the Pot and the Wiper and the other channel to the other side of the pot and the wiper...a Dual Ganged linear pot would also work..... I have seen lots of center dented Pots for sale on e-bay so that might also be a Place to look.... Cheers

25th October 2006, 06:33 PM	#4
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	If you are going to the expense of a TVC, then a variable resistor balance pot is a travesty! Sorry. Instead, consider using a second rotary switch to vary the tap of one channel vs the other. This assumes some reasonably small steps being available on the transformer of course. If not, then use the switch with some precision resistors. Or, just use precision resistors between taps to increase the resolution if it is not quite enough. Howzat?

26th October 2006, 08:06 AM	#6
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	Echowars, my point was that having spent (probably) in the order of $300 for a TVC to avoid the shortcomings of a potentiometer as a volume control, it would be counterproductive to then add one in the form of a balance control into the signal path. Yesterday wasn't one of my best days for discretion...

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