On Jan 11, 2010, at 11:58 AM, ogusa@... wrote:
> I have a bunch of vintage gear in my gig rack, including a Matrix
> 1000, MKS-70, Yamaha TX802. When we did a big gig with a concert PA
> for the first time, the sound guy had to put a noise gate on the mix
> out. I hardly noticed it before because my club PA didn't have nearly
> as much gain. "Old school gear is noisy" the sound guy said, "but it
> sounds awesome."
>
> Stublito
>
> Quoting les_lmbrt <les_lmbrt@...>:
>
>> It doesn't seem likely from what you say. that there is anything you
>> can or should do to the insides of your Matrix. The change of mixer
>> may mean you've changed the gain structure in this part of your
>> setup, possibly the impedances are altered too.
>> Try comparisons with another one first, it may be normal behaviour
>> in ths new setup, it may be some grounding issue within the Matrix,
>> or a factory mod that hasn't been carried out correctly, or at all.
>> The leaking of generator noise is a feature of the Hammond by the
>> way, we all love it, but some are worse than others, nobody persues
>> this.
>> If you're determined to have a look, look for signs of poor
>> connections to ground, have a look at the schematic, look at how
>> many connections to ground there are and consider how the noise
>> might be re-entering the audio circuits before you get the thing
>> open.
>> This capacitor replacement fetish does have a basis in fact, old
>> analog equipment tends to heat capacitors up, and modern equipment
>> has in some cases been built with caps that don't quite do what it
>> says on the tin for quite as long as we'd hoped. Substitution of
>> parts often helps, but it's not where you start.
>>
>> Unless your standard of workmanship is very high, and you're very
>> careful and well organised, you're quite likely to lose what you
>> have, a working keyboard, and gain a large bill for a much more
>> serious repair.
>> The Matrix may or may not have a fault but I believe it's like your
>> car, you need to take it to an experienced person. If you're lucky
>> enough to find one.
>> The techniques required for repairs to synths are not something
>> you're likely to find by accident and enthusiasm.
>> In the days of point to point wired hand made guitar amps, there was
>> a chance to learn by doing without too much chance of doing damage,
>> but the Matrix isn't that kind of animal.
>> Trying to fix it by guesswork, even communal guesswork with well
>> meaning helpers, does sometimes work, but if it has a proper fault a
>> proper repair is what it needs. I understand these talented repair
>> people are hard to find, but the more people that make the effort to
>> look for them and share their positive experiences, the more
>> technical support people will stay in the business.
>>
>> On a more cosmic level:
>> To get the answer, we must formulate the question.
>> Electronics fault finding is a What question, not a Why question.
>>
>> Often the fault is something minor or imaginary,and with the casting
>> of a professional eye you might get news of some impending disaster
>> that will save you a small fortune, the rattling noise that's the
>> mains transformer colliding with the main processing board after the
>> bolts sheared off for example.
>>
>> Turning up the drums isn't that bad an idea too.
>>
>> --- In oberheim@yahoogroups.com, "eightiescrisis"
>> <eightiescrisis@...> wrote:
>>>
>>> Recently upgraded my mixer, and now I notice my Matrix 6R is fairly
>>> noisy. It seems to have a low level noise and synth rumble on all
>>> the patches. What's unique is that the sound changes from patch
>>> to patch, but is always there. You can here it when the synth is
>>> not being played, and I've even removed the midi cable, and turned
>>> everything else off, just the module and the mixer........
>>>
>>> I guess I could turn the main volume down on the unit, but is there
>>> something else I could do?
>>>
>>>
>>> Should I replace the caps, and where are they and what do they
>>> look like?
>>>
>>> Is this common?
>>>
>>
>>
>>
>>
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