[sdiy] Juno-106 replacement filters

[Alexandre Souza]

Or better, pulling the schematic of these modules and remaking it in a
nice, thick fr-4 board with precision resistors/caps.

Enviado do meu Tele-Movel

On Nov 29, 2017 7:59 PM, "Luís Marka" <luis.marka at terra.com.br> wrote:

> Actually the chips themselves should be fine even in bad 80017A modules.
> What seems to happen is that over time the epoxy material reacts with the
> material used for the printed resistors deposited on the ceramic substrate,
> causing corrosion, and this corrosion leads to noisy modules. It should be
> possible to fix a module by cutting out the corroded portion(s) and
> soldering SMD resistors in their place.
>
> I always thought that the epoxy on the voice modules is causing
> overheating and that is what causes the slow death of the rare unobtaniums
> custom ICs underneath.
>
> I'm still investigating on this, probably after restoring
>
>
>
> 2017-11-29 20:05 GMT+01:00 MTG <grant at musictechnologiesgroup.com>:
>
>> It would be nice to find out what the definitive "fix" is for these,
>> aside from replacement.  I've seen discussions talking about arbitrary
>> acetone soaking.  Other ones discussing the length of time depending on the
>> date code, and yet another discussing that it's not the acetone at all,
>> it's the board level resoldering you have to do afterward.
>>
>> I have an MKS30 waiting for me.
>>
>>
>>
>> On 11/29/2017 10:53 AM, NSSINC wrote:
>>
>>>
>>>      I like fixing stuff. I like the Juno-106. But I have grown tired of
>>> fixing my brother's 106 every few months. We don't even bother calibrating
>>> it anymore.
>>>
>>>      So I'm looking for list members opinions of this guys replacement
>>> filter chips:
>>>
>>> http://www.analoguerenaissance.com/AR80017A/
>>>
>>>      And if anyone in the US has opinions on weather it's better to
>>> order direct or from Syntaur.
>>>
>>>
>>> Thanks!
>>>
>>> -Al
>>>
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>
>
>
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