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2013-04-07 by Nicolas
Hi, I used to order some 80017A chips for the Juno-106 from Analogue Renaissance because they are great and reliable. But recently it seems very difficult to contact them by email to make an order. The didn't replied to my last emails. Are they still in business? If no, is there an alternative Thank you! Nicolas
2013-04-07 by Marcelo Malmierca
Did you try to fix yours ? Many many times if you take of the epoxi cover it rebirth. Just put the chips in a jar with acetone 24 hs and then remove the epoxi very gently with a cutter. Marcelo Malmierca
On 07/04/2013, at 12:26, "Nicolas" <nico678@...> wrote: > Hi, > > I used to order some 80017A chips for the Juno-106 from Analogue Renaissance because they are great and reliable. > > But recently it seems very difficult to contact them by email to make an order. The didn't replied to my last emails. > > Are they still in business? > > If no, is there an alternative > > Thank you! > > Nicolas > >
2013-04-07 by Nicolas
Hi, Thank you for replying. I will try that and let you know if it worked. Nicolas --- In vintagesynthrepair@yahoogroups.com, Marcelo Malmierca <estudiosgong@...> wrote:
> > Did you try to fix yours ? > Many many times if you take of the epoxi cover it rebirth. > Just put the chips in a jar with acetone 24 hs and then remove the epoxi very gently with a cutter. > > Marcelo Malmierca > > On 07/04/2013, at 12:26, "Nicolas" <nico678@...> wrote: > > > Hi, > > > > I used to order some 80017A chips for the Juno-106 from Analogue Renaissance because they are great and reliable. > > > > But recently it seems very difficult to contact them by email to make an order. The didn't replied to my last emails. > > > > Are they still in business? > > > > If no, is there an alternative > > > > Thank you! > > > > Nicolas > > > > >
2013-04-07 by Terje Winther
Hi,
I used to order some 80017A chips for the Juno-106 from Analogue Renaissance because they are great and reliable.
But recently it seems very difficult to contact them by email to make an order. The didn't replied to my last emails.
Are they still in business?
If no, is there an alternative
Thank you!
Nicolas
2013-04-07 by hughvartanian
I rebuilt a 106 recently and cleaned the chips so you needed sunglasses to look at them, even under most all of the IC pins. Still, I had some leakage on a couple of channels. While I cannot find the schematics now, I remember that I found the input to the VCA and using some 100K - 200K range resistors, perhaps to V+ but maybe ground (don't remember!), I managed to bring the amp back to just the point of cutting off and stopped the leak-through. I remember selecting the highest resistor that would stop the leakage on each channel with the problem. I recall that I got to this by measuring the voltages on the control pins to the 80017A, although I also recall that they might be current-controlled inputs. If you need me to dig into the schematics and chip block diagram I can maybe provide some more detailed guidance, although I do not have the synth anymore to confirm any story I might be telling from memory! I purchased an 80017A from synthparts.com (email synthparts@...). Doug was the guy's name. Service was fine enough. (I can not say if the part I got from them had the leakage problem or not since I did not keep track of that one vs. the other 5 in my 106. There were 2, maybe 3 parts that I had to make this mod to when I was finished re-assembling everything.) Good luck, Hugh --- In vintagesynthrepair@yahoogroups.com, Terje Winther <terje.winther@...> wrote:
> > Yes, they are still around. > A bit slow business, but very good products. > > > Den 7. april. 2013 kl. 17.26 skrev Nicolas: > > > Hi, > > > > I used to order some 80017A chips for the Juno-106 from Analogue > > Renaissance because they are great and reliable. > > > > But recently it seems very difficult to contact them by email to > > make an order. The didn't replied to my last emails. > > > > Are they still in business? > > > > If no, is there an alternative > > > > Thank you! > > > > Nicolas > > > > > > Terje Winther > terje.winther@... > http://wintherstormer.no/ >
2013-04-16 by Nicolas
Hi, I removed the coating on the original 80017 chips by soaking them in acetone. It took about a week to completely remove the coating. I reinstalled the chips in the Juno-106 and them seems to be working fine now. I'm gonna test them for a couple of days to see if they don't fail again. The only thing I would advise is not to remove the small pins on these chips like I did. I was able to resolder them but not without damaging the pads on the board. They seems to be fragile. Thanks for your help! Nicolas --- In vintagesynthrepair@yahoogroups.com, "hughvartanian" <bouncev@...> wrote:
> > I rebuilt a 106 recently and cleaned the chips so you needed sunglasses to look at them, even under most all of the IC pins. Still, I had some leakage on a couple of channels. While I cannot find the schematics now, I remember that I found the input to the VCA and using some 100K - 200K range resistors, perhaps to V+ but maybe ground (don't remember!), I managed to bring the amp back to just the point of cutting off and stopped the leak-through. I remember selecting the highest resistor that would stop the leakage on each channel with the problem. I recall that I got to this by measuring the voltages on the control pins to the 80017A, although I also recall that they might be current-controlled inputs. > > If you need me to dig into the schematics and chip block diagram I can maybe provide some more detailed guidance, although I do not have the synth anymore to confirm any story I might be telling from memory! > > I purchased an 80017A from synthparts.com (email synthparts@...). Doug was the guy's name. Service was fine enough. (I can not say if the part I got from them had the leakage problem or not since I did not keep track of that one vs. the other 5 in my 106. There were 2, maybe 3 parts that I had to make this mod to when I was finished re-assembling everything.) > > Good luck, > Hugh > > --- In vintagesynthrepair@yahoogroups.com, Terje Winther <terje.winther@> wrote: > > > > Yes, they are still around. > > A bit slow business, but very good products. > > > > > > Den 7. april. 2013 kl. 17.26 skrev Nicolas: > > > > > Hi, > > > > > > I used to order some 80017A chips for the Juno-106 from Analogue > > > Renaissance because they are great and reliable. > > > > > > But recently it seems very difficult to contact them by email to > > > make an order. The didn't replied to my last emails. > > > > > > Are they still in business? > > > > > > If no, is there an alternative > > > > > > Thank you! > > > > > > Nicolas > > > > > > > > > > Terje Winther > > terje.winther@ > > http://wintherstormer.no/ > > >
2013-04-21 by Hugh Vartanian
Yes, the pads on the ceramic module are fragile and I'm not sure of the solder formulation. Difficult to even resolder pcb pins' pads.
I used a fine needle pick and fine stiff wire, like dental floss, to (painstakingly) clean under the chip pins. Not sure if this is even necessary or not. Certainly between pins would not hurt, if we are after leakage current paths through the coating.....
-Hugh
Hi,
I removed the coating on the original 80017 chips by soaking them in acetone. It took about a week to completely remove the coating.
I reinstalled the chips in the Juno-106 and them seems to be working fine now. I'm gonna test them for a couple of days to see if they don't fail again.
The only thing I would advise is not to remove the small pins on these chips like I did. I was able to resolder them but not without damaging the pads on the board. They seems to be fragile.
Thanks for your help!
Nicolas
--- In vintagesynthrepair@yahoogroups.com, "hughvartanian" wrote:
>
> I rebuilt a 106 recently and cleaned the chips so you needed sunglasses to look at them, even under most all of the IC pins. Still, I had some leakage on a couple of channels. While I cannot find the schematics now, I remember that I found the input to the VCA and using some 100K - 200K range resistors, perhaps to V+ but maybe ground (don't remember!), I managed to bring the amp back to just the point of cutting off and stopped the leak-through. I remember selecting the highest resistor that would stop the leakage on each channel with the problem. I recall that I got to this by measuring the voltages on the control pins to the 80017A, although I also recall that they might be current-controlled inputs.
>
> If you need me to dig into the schematics and chip block diagram I can maybe provide some more detailed guidance, although I do not have the synth anymore to confirm any story I might be telling from memory!
>
> I purchased an 80017A from synthparts.com (email synthparts@...). Doug was the guy's name. Service was fine enough. (I can not say if the part I got from them had the leakage problem or not since I did not keep track of that one vs. the other 5 in my 106. There were 2, maybe 3 parts that I had to make this mod to when I was finished re-assembling everything.)
>
> Good luck,
> Hugh
>
> --- In vintagesynthrepair@yahoogroups.com, Terje Winther wrote:
> >
> > Yes, they are still around.
> > A bit slow business, but very good products.
> >
> >
> > Den 7. april. 2013 kl. 17.26 skrev Nicolas:
> >
> > > Hi,
> > >;
> > > I used to order some 80017A chips for the Juno-106 from Analogue
> > > Renaissance because they are great and reliable.
> > >
> > > But recently it seems very difficult to contact them by email to
> > > make an order. The didn't replied to my last emails.
> > >
> > > Are they still in business?
> > >
> > > If no, is there an alternative
> > >
> > > Thank you!
> > >
> > > Nicolas
> > >
> > >
> >
> > Terje Winther
> > terje.winther@
> > http://wintherstormer.no/
> >
>