SV: [sdiy] noise with vintage equipment

cheater cheater cheater00 at gmail.com
Tue Jan 12 23:33:02 CET 2010


White noise is probably a broken op amp on the output. Check the
output buffer first. Take your scope and test the output for noise,
then the input of the stage.

On Tue, Jan 12, 2010 at 19:47, mailing gigaspeeds <mailing at gigaspeeds.be> wrote:
>
> the stereo out has a higher output level than instruments you find today,
> there is another output with a connector from the 70's that I haven't seen
> in my whole life :-D
> all the speakers that are in the eminent 310 are wired in series to the
> headphone connector, from there again in series to that 70's output at the
> back.
>
> Sorry if I haven't been clear about what kind of noise it is, it's just the
> usual white noise. nothing seems to be broken.
>
> The stereo out seems to be in bad shape, so I'll try to replace that one and
> will also check the PSU caps as mentioned.
>
> Replacing all carbon resistors would be a punishment, there are over 400
> resistors in that thing :p .
>
> I'll try to contact some folks who own an eminent to see what they did about
> it.
>
> thx a lot
>
> John Alex Hvidlykke wrote:
>>
>> Hi Benjamin
>>
>> I am not familiar with the connections on that instrument, but when you
>> say
>> "a stereo out", is that perhaps a headpohone connector? If so some of the
>> noise might be from a less-than-perfect headphone amplifier. Are there any
>> other outputs on the Eminent, and does the problem persist?
>>
>> Regards
>>
>> John
>>
>>
>>>
>>> -----Oprindelig meddelelse-----
>>> Fra: synth-diy-bounces at dropmix.xs4all.nl
>>> [mailto:synth-diy-bounces at dropmix.xs4all.nl]På vegne af mailing
>>> gigaspeeds
>>> Sendt: 12. januar 2010 11:52
>>> Til: 'synthdiy DIY'
>>> Emne: [sdiy] noise with vintage equipment
>>>
>>>
>>>
>>> Hi Guys,
>>>
>>> I have an almost restored eminent 310 string ensemble, on the front is a
>>> stereo out, If I connect this to my amp I have terrible noise...
>>>
>>> How can I fix this while preserving the vintage sound...
>>>
>>> I know you have these 19" noise reducers, but I though as NOISE is found
>>> in the whole spectrum this would alter my whole sound as well I guess...
>>>
>>> I'm also willing o fix the root of this problem, probably worn/old parts
>>> ?
>>>
>>> - carbon composite resistors
>>> - what about dried up caps ? (this would cause other problems I guess)
>>> - noisy opamp design ? (would be harder to fix, altering the design...I
>>> have the schematisch though)
>>> - are there any other parts that would cause noise ?
>>>
>>> Do any of you own vintage equipment ? How did you *try* to fix this ?
>>>
>>>
>>> thx a lot for the advice
>>> Benjamin
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at synth-diy.org
>>> http://synth-diy.org/mailman/listinfo/synth-diy
>>> No virus found in this incoming message.
>>> Checked by AVG - www.avg.com
>>> Version: 9.0.725 / Virus Database: 270.14.133/2612 - Release
>>> Date: 01/11/10 20:35:00
>>>
>>>
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at synth-diy.org
>> http://synth-diy.org/mailman/listinfo/synth-diy
>>
>>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
>



More information about the Synth-diy mailing list