Grounding issue while calibrating tape machine?
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- suffering 'studio suck'
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Grounding issue while calibrating tape machine?
so i've been trying to align and calibrate my Revox B77 for the first time, and i'm running into some weird issues, the main one being this: when i touch the screwdriver to some of the adjustment pots, that contact makes the VU meter jump up or down a few db. it doesn't happen with all the pots, but definitely with the "Repro Level" and maybe a couple others. I assumed this is a grounding issue, but i'm not really sure (it seemed like it jumped around differently based on whether my other hand was touching the metal frame, what type of screwdriver i was using, whether my feet were touching the ground, etc). anyone run into this problem before? any easy solution?
- JohnDavisNYC
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you should try it with a non-conductive plastic screwdriver... one of those 'tweaker tools'... i'm sure someone else will chime in with the best place to buy them.
i use a metal mini-screwdriver for lining up my A80, and it doesn't seem to be a problem, but i know that for many people/machines, it is.
john
i use a metal mini-screwdriver for lining up my A80, and it doesn't seem to be a problem, but i know that for many people/machines, it is.
john
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- re-cappin' neve
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Adjustments like that should be made with a fiddlestick, otherwise known as a trimpot adjustment tool. It's essentially a plastic (and therefore non-conductive) screwdriver.
That's a very common situation, so I doubt there's any grounding issues with your machine.
That's a very common situation, so I doubt there's any grounding issues with your machine.
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- re-cappin' neve
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Toaster beat me to it. ("Great minds" and all that!)
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Because I hate to think what Google would give you if you searched for "tweaker stick":
http://parts.digikey.com/1/parts/745515 ... -t000.html
http://parts.digikey.com/1/parts/745515 ... -t000.html
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- re-cappin' neve
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The Scum wrote:Because I hate to think what Google would give you if you searched for "tweaker stick":
http://parts.digikey.com/1/parts/745515 ... -t000.html
Fiddlestick makes for very entertaining results.
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