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AUDIO FORUMS >> General Discussion and Support >> volume control removal in ZKIT1
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Message started by litefootdan on 01/28/19 at 01:11:38

Title: volume control removal in ZKIT1
Post by litefootdan on 01/28/19 at 01:11:38

Unfortunately a while ago I bumped something into the volume control in my ZKIT1 and it now makes a loud humming sound everywhere except when it is at maximum. In this instance, I'd just like to remove it and solder it to run wide open. Does anyone have the know how and ability to post a pic of a ZKIT1 board with marks on it where I should solder a wire from and to. Sorry for my complete lack of ability to do anything I should be able to do. As some may know, I am a "Paint by Number" diy'er. Anyway, thanks in advance.

Title: Re: volume control removal in ZKIT1
Post by dank on 01/28/19 at 16:48:40

Hi Dan

Here's a generic picture. Double it for stereo. I don't know if the Zkit board has any provisions for a volume or not, but one way or another it has to follow the picture.

A single wire per channel soldered to the volume control would do it, although if it works fine now "wide open", I'd just set it there and leave it. Maybe take off the knob.

Dan

Title: Re: volume control removal in ZKIT1
Post by Jeff of Arabica on 01/29/19 at 02:47:02

Hey Dan!

You should be able to take a peak under the hood and follow the signal wire from the RCA input to the potentiometer and then potentiometer to the input tube. You would do this for each stereo channel. I assume your potentiometer is 100k Ohm so you will need to add a 100K Ohm resistor (1/2 or 1 watt) to ground for each channel. Essentially you will connect the + wire from the RCA jack to one end of the 100K resistor. Then connect another wire from that same end of the resistor to the input tube pin. Can probably use the same wire that is already connected to the input tube pin that you removed from the potentiometer. This will save some effort. The other end of the 100K resistor will go to ground. Your potentiometer had a ground wire so you can see where the ground wire on the potentiometer connected to and attach your wire from the other end of 100K resistor to that ground connection point.

You should notice a nice SQ improvement once finished. I definitely prefer my ZMA without any onboard attenuation.

Good luck man :)

Cheers,
Jeff