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Re : Re : CEM3374 VCO and CEM3372 VCF/VCA chips available

serra peggy
 

Hi everyone there!

Thanx for all your comments and support!
I'm going on the way of recapping...anyway if on of us hear about some CEM3374 available let me know!
I'll stay tuned.

Bye

PS: I love my Xpander as it's like the secret weapon of my studio, i think it's the same for many of us...

De : envia94
? : xpantastic@...
Envoy¨¦ le : Mar 7 septembre 2010, 13h 30min 55s
Objet?: Re: Re : [xpantastic] CEM3374 VCO and CEM3372 VCF/VCA chips available

?

Hi,

Please, you can contact Doug directly in his email address. But, be aware that a CEM3374 is one of the most rare vintage synth chips! Therefore, you should buy them as many as you can afford or is available. I would take a pair as a minimum. But, in any case, you just need to change that chip, which is not working. Take all the precautions against the static electricity, which can break this and many other ships, if you are careless. Have you also tried to push the chips back to their places? They have the tendency to come up after many years of use. Or, remove the assumably problematic chip and then push it carefully and tightly back to its place. This could well be enough to fix the problem. An other as important work is to replace all condensators, which tend to dry during the years. This is very typically done also just as a precaution.

Good luck!


--- In xpantastic@..., serra peggy wrote:
>
> Hello!
> Excuse my bad english i'm french.
> I've got an xpander witch 3374 of voice N?¡ã6 needs to get replace cos tuning
> fails...
> all 3372 have already been replaced.
> I think for a better result i should replace the all 6 3374 don't you think.
> How much would it be for 6 of them plus shipping to France?
> Would you accept Paypal transfer?
>
> Thank you very much for reading me.
> I hope to get good news from you soon.
> Bye
> Peggy & Franck
>
>
>
>
>
>
> ________________________________
> De : synthparts
> ?€ : xpantastic@...
> Envoy?? le : Sam 4 septembre 2010, 1h 39min 03s
> Objet : [xpantastic] CEM3374 VCO and CEM3372 VCF/VCA chips available
>
>
> Hi, I have a few CEM3374s and CEM3372s for your Xpander/Matrix-12 in stock now.
> All chips are tested and guaranteed working.
>
> Thanks,
> Doug
> synthparts.com
>
envia94
 

There is sometimes one CEM3374 or so for sale at www.ebay.com, www.ebay.co.uk, or www.ebay.de. In an extremely desperate situation, you may also try to ask me again.
 

envia94 wrote:
There is sometimes one CEM3374 or so for sale at www.ebay.com, www.ebay.co.uk, or www.ebay.de. In an extremely desperate situation, you may also try to ask me again.
I have a question which can anyone answer?

My Xpander shows all tuning tests as 'SUCCESS', no failures. But the voices sound a bit 'parpy' and tinny.

Is it possible for tuning to succeed, yet the voice chips are still faulty? Or do the tests mean my Xpander is fine.

Thanks,

Jeremy.
 

¿ªÔÆÌåÓý


I buyed my Xpander new mid 80th, never a CEM 3374 failed,- but I buyed 1 pc as a replacement if it will ever happen.
CEM 3372 is easier to blow because the signal created by the OSC (CEM 3374) goes thru the CEM 3372 (Filter/signal generator), but also,- only one failed here within all the decades.

1st take care of the PSU,- outgoing voltages should be stable.
If this isn?t the case, there?s a overhaul necessary.

If you lose bass response, replace all the 2.2uF elecrlytic capacitors you find on the voiceboard and pull chips out, clean sockets and eventually legs of chips and put ?em back into their sockets.
Doing this fixes all probs, incl. voices fail in autotune procedure, in most cases and it?s much cheaper than buying super expensive rare chips today.

The test means nothing in real world,- a voice showing tunig failure might be caused by a bad cap which is responsible for reporting the condition of a voice to the processor,- that?s all.

Voice "fail" can mean a lot of probs, not only the chips are dead or such and is just only a routine of the OS switching voices to "off"? which show "fail".
Dirty switches w/ contact probs and being active in the tuning page can cause "fail" too.
I have that since ages I have to press "tune all" twice and then all voices say "pass" ... :-)
No damaged voice in my Xpander,- it tunes fine and keeps stable,- also sounds great.

To the ebay buyers,- if you see pics showing all voices "pass" in autotune page,- that doesn?t mean the Xpander is great or works flawlessly !

I?ll recap my Xpander this autumn or winter BEFORE chips fail.

PeWe



Am 07.09.2010 23:37, schrieb Jeremy Smith BSc (Hons):

?


I have a question which can anyone answer?

My Xpander shows all tuning tests as 'SUCCESS', no failures. But the
voices sound a bit 'parpy' and tinny.

Is it possible for tuning to succeed, yet the voice chips are still
faulty? Or do the tests mean my Xpander is fine.

Thanks,

Jeremy.
 

Here's something that may be interesting to some.

Someone who is good at patching, come up with a great bass patch (and some others),
and record a few notes of that patch.

Upload the patch, notes text file, and audio file to the Yahoo site.

Then we can all download the patch, listen to the audio file and compare it to the sound on our own boxes.

Of course, there will be some differences due to the audio playback on each system, but it would still be an interesting experiment.

I never though the bass sounded good on my Xpander.

What do the rest of you think??



On Tue, Sep 7, 2010 at 3:25 PM, PeWe <ha-pewe@...> wrote:
?


I buyed my Xpander new mid 80th, never a CEM 3374 failed,- but I buyed 1 pc as a replacement if it will ever happen.
CEM 3372 is easier to blow because the signal created by the OSC (CEM 3374) goes thru the CEM 3372 (Filter/signal generator), but also,- only one failed here within all the decades.

1st take care of the PSU,- outgoing voltages should be stable.
If this isn?t the case, there?s a overhaul necessary.

If you lose bass response, replace all the 2.2uF elecrlytic capacitors you find on the voiceboard and pull chips out, clean sockets and eventually legs of chips and put ?em back into their sockets.
Doing this fixes all probs, incl. voices fail in autotune procedure, in most cases and it?s much cheaper than buying super expensive rare chips today.

The test means nothing in real world,- a voice showing tunig failure might be caused by a bad cap which is responsible for reporting the condition of a voice to the processor,- that?s all.

Voice "fail" can mean a lot of probs, not only the chips are dead or such and is just only a routine of the OS switching voices to "off"? which show "fail".
Dirty switches w/ contact probs and being active in the tuning page can cause "fail" too.
I have that since ages I have to press "tune all" twice and then all voices say "pass" ... :-)
No damaged voice in my Xpander,- it tunes fine and keeps stable,- also sounds great.

To the ebay buyers,- if you see pics showing all voices "pass" in autotune page,- that doesn?t mean the Xpander is great or works flawlessly !

I?ll recap my Xpander this autumn or winter BEFORE chips fail.

PeWe



Am 07.09.2010 23:37, schrieb Jeremy Smith BSc (Hons):

?


I have a question which can anyone answer?

My Xpander shows all tuning tests as 'SUCCESS', no failures. But the
voices sound a bit 'parpy' and tinny.

Is it possible for tuning to succeed, yet the voice chips are still
faulty? Or do the tests mean my Xpander is fine.

Thanks,

Jeremy.
 

Tony Cappellini wrote:
Here's something that may be interesting to some.
Someone who is good at patching, come up with a great bass patch (and some others),
and record a few notes of that patch.
Upload the patch, notes text file, and audio file to the Yahoo site.
Then we can all download the patch, listen to the audio file and compare it to the sound on our own boxes.
Of course, there will be some differences due to the audio playback on each system, but it would still be an interesting experiment.
I never though the bass sounded good on my Xpander.
What do the rest of you think??
Count me in!

Thanks,

Jeremy.

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