On Mar 17, 2022, at 1:04 PM, Scott Rodriguez <synthrodriguez@...> wrote:

?

My expectation is that the chip has become defective. There's not much else that would do that and stabilize after 15 or 20 minutes as you describe.

How far out is it when it's cold before it warms up? A few cents? A half-step?.

On Thu, Mar 17, 2022 at 1:53 PM Alexander488 <alexander488@...> wrote:

Hello everyone, I have a CS80 that recently developed ?a tuning problem with one voice. The repair shop that worked on it a few years ago thought it might be a calibration issue. I just got it back from the shop and the one voice is still not in tune when I first power up, but about 15 or 20 after the CS has warmed up, it stabilizes and is in tune. Since I never had this problem before I am thinking there is still something that needs to be fixed or replaced.?

Just wondering what insights any of you might have regarding this problem?

Thanks in advance for your help!

Best regards,

Alex

On Mar 17, 2022, at 1:09 PM, Alexander488 <alexander488@...> wrote:

?

Hi Scott, I don’t know. I can ask the technician, he would likely know since he said he had to wait for it to warm up before he could calibrate that voice.?

On Mar 17, 2022, at 1:04 PM, Scott Rodriguez <synthrodriguez@...> wrote:

?

My expectation is that the chip has become defective. There's not much else that would do that and stabilize after 15 or 20 minutes as you describe.

How far out is it when it's cold before it warms up? A few cents? A half-step?.

On Thu, Mar 17, 2022 at 1:53 PM Alexander488 <alexander488@...> wrote:

Hello everyone, I have a CS80 that recently developed ?a tuning problem with one voice. The repair shop that worked on it a few years ago thought it might be a calibration issue. I just got it back from the shop and the one voice is still not in tune when I first power up, but about 15 or 20 after the CS has warmed up, it stabilizes and is in tune. Since I never had this problem before I am thinking there is still something that needs to be fixed or replaced.?

Just wondering what insights any of you might have regarding this problem?

Thanks in advance for your help!

Best regards,

Alex

On Mar 17, 2022, at 11:09 AM, Alexander488 <alexander488@...> wrote:

?

Hi Scott, I don’t know. I can ask the technician, he would likely know since he said he had to wait for it to warm up before he could calibrate that voice.?

On Mar 17, 2022, at 1:04 PM, Scott Rodriguez <synthrodriguez@...> wrote:

?

My expectation is that the chip has become defective. There's not much else that would do that and stabilize after 15 or 20 minutes as you describe.

How far out is it when it's cold before it warms up? A few cents? A half-step?.

On Thu, Mar 17, 2022 at 1:53 PM Alexander488 <alexander488@...> wrote:

Hello everyone, I have a CS80 that recently developed ?a tuning problem with one voice. The repair shop that worked on it a few years ago thought it might be a calibration issue. I just got it back from the shop and the one voice is still not in tune when I first power up, but about 15 or 20 after the CS has warmed up, it stabilizes and is in tune. Since I never had this problem before I am thinking there is still something that needs to be fixed or replaced.?

Just wondering what insights any of you might have regarding this problem?

Thanks in advance for your help!

Best regards,

Alex

On Mar 17, 2022, at 1:20 PM, T.M. Bois via groups.io <bucklehorse@...> wrote:

?

As long as we’re talking just a few cents off in either direction, I always understood this was standard behaviour, and why it’s suggested that you let the synth warm up to a stable operating temp before tuning it—a rule that applied in ‘76 as much as it applies today. I’ve got the older tuning pots on mine and the tuning definitely drifts a bit as it warms up/cools down.?

Given all of the calamitous problems that can arise in a CS80 following a service, I’d say you’re in pretty good shape if this is the worst of them. ;)

On Mar 17, 2022, at 11:09 AM, Alexander488 <alexander488@...> wrote:

?

Hi Scott, I don’t know. I can ask the technician, he would likely know since he said he had to wait for it to warm up before he could calibrate that voice.?

On Mar 17, 2022, at 1:04 PM, Scott Rodriguez <synthrodriguez@...> wrote:

?

My expectation is that the chip has become defective. There's not much else that would do that and stabilize after 15 or 20 minutes as you describe.

How far out is it when it's cold before it warms up? A few cents? A half-step?.

On Thu, Mar 17, 2022 at 1:53 PM Alexander488 <alexander488@...> wrote:

Hello everyone, I have a CS80 that recently developed ?a tuning problem with one voice. The repair shop that worked on it a few years ago thought it might be a calibration issue. I just got it back from the shop and the one voice is still not in tune when I first power up, but about 15 or 20 after the CS has warmed up, it stabilizes and is in tune. Since I never had this problem before I am thinking there is still something that needs to be fixed or replaced.?

Just wondering what insights any of you might have regarding this problem?

Thanks in advance for your help!

Best regards,

Alex