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V-pot replacement

Discussion board for Mackie's d8b Digital Console users.

V-pot replacement

Postby Old School » Sat Feb 27, 2016 5:27 am

Hi all,
Having searched the market over for a replacement for my D8B, I have come to the conclusion that everything within my price range is a compromise of one sort or another while offering only (in some cases) better pre-amps. Having said this I must undertake replacing the V-pots on my original D8B (EQ section mainly), as my spare D8B (which I have been using because of this problem) has developed problems with the main audio output. Has anyone here ever replaced them?
If so, how hard are they to get to? I could mouse the EQ's but prefer not to. All advice will be greatly appreciated.

Have a blessed day in Christ,
Mike W.
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Re: V-pot replacement

Postby Bruce Graham » Sat Feb 27, 2016 6:53 am

Hey Mike;

Do the V pots need replacing or cleaning??

There is a thread in here regarding cleaning. called "Fader Problems and V-Pots". There is a method for cleaning in there.

I haven't replaced any V-pots my self but will try to look into it and get back to you.

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Bruce
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Re: V-pot replacement

Postby Old School » Sat Feb 27, 2016 10:16 pm

Hi Bruce,
I've already tried all the cleaning procedures and they are still far to jumpy to be usable. Time is money in the studio and I can't afford to let my customers think that something is wrong with the equipment. I want to replace them with the more lightly used v-pots from the last four channels on my spare board. Thanks for any help you can give me.

Have a blessed day in Christ,
Mike W.
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Re: V-pot replacement

Postby anyhorizon » Sun Feb 28, 2016 4:26 am

You probably have seen this but I post it anyway. Works for all V-pots.

V-pots

Peter
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Re: V-pot replacement

Postby Old School » Sun Feb 28, 2016 7:03 am

Thanks for posting that, but I tried it & there was only marginal improvement. There is something that feels like a "bump" for lack of a better word in the affected v-pots. I repeated the process the next day just to make sure & it was the same.
My board has seen a lot of use, and maybe I am too much of a perfectionist and over-use the EQ section. The speaker level pot, however, has had issues from day one & is still the worst offender. Anyway thanks & hope you & yours are doing well.

Have a blessed evening in Christ,
Mike W.
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Re: V-pot replacement

Postby Old School » Sat Mar 05, 2016 2:02 am

Hi all,
For anyone who has issues with their V-pots and has exhausted all other avenues without success, I offer the following fix as a LAST RESORT. I do NOT recommend doing this unless your V-pot is unusable and you have tried all other methods of fixing it without success. That being said, here it is: 1. Remove the plastic knob from the pot and place it in the end of a cordless drill. 2. Using an eye dropper, put about 4=5 drops of alcohol (must be 90% or better) into the hole. 3. Quickly engage the stem with the plastic cap in your drill and rotate it at speed for about 10 seconds. 4. Pot works normally. I did this and now I can easily fine tune the EQ parameters ( no jumping, no jitters) and the master volume is rock solid.

Have a blessed day in Christ,
Mike W.
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Re: V-pot replacement

Postby Bruce Graham » Sat Mar 05, 2016 2:44 am

Hi Mike;

I'm glad it worked! Must have been a few nervous moments when doing that!

I'll file that one away for when I need it. I have a jumpy volume pot that drives me crazy. The other methods solve it but only until I turn it back on and we are back to doing it again.

As my brother would say in cases like like......"Good Job".

Cheers
Bruce
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Re: V-pot replacement

Postby anyhorizon » Sat Mar 05, 2016 3:21 am

That seems a bit rad. What was wrong with the 99% isopropyl alcohol suggestion in the database?

Peter
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Re: V-pot replacement

Postby Old School » Sat Mar 05, 2016 3:37 am

Hi Peter,
I tried all the tricks in the database before attempting this, including the 99% alcohol thing. I even repeated it several times over a couple of days. It just didn't restore the functionality of the pot. The pots would still jump several numbers at a time and sometimes extreme jumps. I just can't deal with that. At any rate I hope I made it clear that this is a LAST RESORT. If your pot is not usable, then what have you got to lose?

Have a blessed day in Christ,
Mike W.
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Re: V-pot replacement

Postby anyhorizon » Sat Mar 05, 2016 4:42 am

Ok. As long as you're up and running. I wouldn't do it myself but keep the dream alive.

Cheers,

Peter
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