[sdiy] Ideas on resonance problem on single OB-Xa voice

[Adam Inglis]

On 23/02/2015, at 7:25 AM, Michael E Caloroso wrote:
>  Many repairs cannot be fixed over the internet.
> Is it so harsh to defer repairs to qualified techs?


No, it is sound advice, when the target person for the advice is a  
complete unknown. However, this is not a noisy forum. The people that  
subscribe to this list seem to be geniune, respectful, thoughtful  
types whether they are professional techs or amateurs, so I think the  
benefit of the doubt applies.
I for one am self-taught at this stuff, and appreciate enormously the  
generosity and patience of all the professionals here.
Their help has enabled me to fix all manner of synths, samplers, drum  
machines (yes, some of these considered vintage classics) over many  
years.


cheers
Adam




>
> On 2/22/15, Rutger Vlek <rutgervlek at gmail.com> wrote:
>> Hi MC,
>>
>> In principle I agree with you, but your message is a bit harsh I  
>> think. And
>> in this case not exactly appropriate, as Tim seems to be a rather  
>> careful
>> guy that just likes to learn. We all had our "first times" when  
>> fixing a
>> synth, didn't we? And we all mess up occasionally (hopefully not  
>> too often).
>> If we had never attempted, all those synths would be left broken  
>> either
>> way.
>>
>> Best,
>>
>> Rutger
>>
>> ps. Tim, good to hear! Keep the OB in good shape and enjoy a fine  
>> piece of
>> synth :).
>>
>> On 22 feb 2015, at 01:20, Michael E Caloroso wrote:
>>
>>>> I'm not that good at reading schematics.
>>>
>>> Please do not try to fix this yourself.  Stop right now and take  
>>> it to
>>> a competent repair tech.  Too many of these wonderful vintage
>>> synthesizers have been destroyed by incompetent repair jobs and  
>>> repair
>>> techs are starting to refuse botched DIY repair jobs.  A repair job
>>> like this is seldom trivial and cannot be fixed over the  
>>> internet.  If
>>> you cannot grasp complex systems such as polyphonic analog synths or
>>> correctly interpret a schematic, you will do more damage and your
>>> repair bill will be higher.  The circuits have many complex
>>> interactions.  A problem can be deceptive and may actually have
>>> another cause somewhere else.  Complex systems need complex  
>>> tools.  A
>>> DMM is going to tell you little.  Oscilloscopes and other test
>>> instruments are not easy tools to use and it is easy to use them the
>>> wrong way.  "Professional driver" disclaimer...
>>>
>>> There's a reason these things are labeled NO USER SERVICEABLE PARTS
>>> INSIDE.
>>>
>>> MC
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>