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Re: cem3374 needed

 


mursupeppe schrieb:


I've heard people tell this about their 3374s, but after
cross-checking I really have to admit that one of them is really
broken. The other one's outputting triangle wave minor third higher
than expected, so I cannot count that as "gone", not yet, at least.
Something else could be wrong as well, but we're still doing testing
and concentrating on the physical issues.
Because this is related to the voiceboards, Id 1st recap em,- its 70 caps to replace.
Check the PSU too for stability, caps, diode.


(cont'd)...which is what I was _told_, literally: "in 100% working
condition".
Yes, Im sure you asked a lot,- but "privat, no guarantee, no return" means you agree on this if you bid and buy and this is all which counts in a case.
So, I dt see youll get any money back and its sad I have to say it this way.

I just wouldn't sell any of
those as "trouble-free" or "perfectly functioning". :-D
Yep,- thats nice to read from you and be sure I myself wont too,- but there are many other human beings around, you know.

I myself I have no real issues up to now even I toured w/ my Xpander over europe, north africa and eastern block/black sea in the 80th/90th.
Actually I dont plan to sell it, but try to beware it from more issues as it has actually, which is some switches, one of the pushbuttons of the numeric keypad and 2 rotarys which eventually only need a cleaning job.
But I also buyed some parts to have em in stock,- a matched set of CEM3372 signal generators and I got 100 caps to replace the 70 needed for the voiceboards before it shows issues.

I'm pretty confident we'll sort this out with some amount of
time. And money. Argh. :-/
Be sure, youre not alone and I feel w/ you.


Obviously, though, you're talking "in general" and not
probably referring to this case,
absolutely !

but I'll agree with you completely.

thx a lot.


I'd say we could blame DX7 and D50 at least partially for that. Them
and the evolution of pop taste.
I cannot blame a DX/TX or D50 (D550) in any way,- I own both in addition and Ive found out in countless studiosessions, a Xpander plus a DX is a great combo,- also for layering stuff.
The D50/550 is a different beast, but one of the Roland synths worth to keep, especially if you have a Musitrinics speed kit w/ memory expansion built in.

(x) Newsflash! The keyboard tech replaced every rotary pot with a
similar part and all he had to do was reverse the connection as the
spare parts weren't identical to originals. The result: they all work
now. If anyone needs further info, let me know and I'll ask dirty
details. The feel is similar, but a bit quieter. No more "tr.. tr..
rrr... RRRrrr" whilst editing. The bonus: the pots have a switch
built-in, so one could override the push buttons under the display as
well if wanted and replace them with a nice led thingy or... never
mind. :-)
Oh,- thats a very interesting info,- may I ask for more details and type/specs of this rotary replacements as well as instructions for replacing ?

He was also pretty confident he could replace the displays with an
updated part of sorts, but it would lose the "Xpander/Matrix" style.
Instead, it would be and LCD (if I remember correctly) and
black/white. Again, don't blame me for not asking details before
writing.
Any details would be pretty welcome if possible.


I agree, my approach is because of my personal preferences: I like to
"feel" the synth.
No question, thats anyones preference, also mine.
Thats why I called using software a workaround.
The machine is not unusable w/ malfunctioning switches and pots this way and until recovery is reality.

b.t.w.,- if someone needs processors for Xpander/Matrix-12,- youll
find em in Matrix-1000s (and eventually Matrix-6,- Im not sure).
As far as I know, there are six CEM3396 IC chips inside. I don't
remember Xpander using those - is there something I should know?
Dont misunderstand processor and chip.
The IBM processors used in a Xpander /Matrix-12 are also rare.
THIS is what you find also in a Matrix 1000.
Thanks Karl, now I know it and keep my Matrix-1000.

It was just only a example of searching and finding cheaper synths to pull components for the expensive flagships.
So, theres not always a need to buy a 2nd identical model of a damaged synth for parts,- but this still depends on the wanted part(s).

I didnt investigate up to now, but Im sure there were other synths of other manufacturers using CEM3374 as OSCs.

Maybe this is a chance to look for if this type of chip is urgently needed.


Re: cem3374 needed

mursupeppe
 

Hi and thanks for the links.

I happen to know the deep mud I'm in and so I just recently bought two Xpanders (one beyond repairs, the other should be fine), just to find out whether there's anything worth scavenging. Again, I'll let you know if and what.

Up to now, I never had a blown 3374 in my Xpander,- but I?m on the
waitlist for 3374 @vintage planet for years and like many others are.
CEM3372 are much easier to find.
I've heard people tell this about their 3374s, but after cross-checking I really have to admit that one of them is really broken. The other one's outputting triangle wave minor third higher than expected, so I cannot count that as "gone", not yet, at least. Something else could be wrong as well, but we're still doing testing and concentrating on the physical issues.

The case:
Buying vintage gear @ebay, you always buy "private" and because of being
"vintage" w/ no warranty and no return.
You agree on this if you bid !
It didn't go like that.

I first asked a few questions very carefully, as I wasn't on the holy pony for the first time. I've owned quite a few analog synths in my past and know what they can be like. Finding a pristine - mint, whatever - thing is about as rare as waking up in Mars. Nag nag, yadda yadda, boo hoo... (cont'd)

If someone is doing this, he should be prepared for issues unless it?s
made evident the item is in working condition electronically (!!!).
(cont'd)...which is what I was _told_, literally: "in 100% working condition".

But there?s no guarantee w/ vintage gear, (tack)-switches and pots will
be without issues or the unit won?t blow up the next time you power it
up after arrival.
I've got a few analog modulars that are about as moody as a difficult teenager after two beers. I have a faint feeling the behaviour you just described is remotely familiar. I just wouldn't sell any of those as "trouble-free" or "perfectly functioning". :-D

I'm not too keen on opening the case any more than this. What's my problem shouldn't poison the rest of you, even though I was the cat that brought the carcass in. Sorry for bad feelings, everyone, but I'll keep the lid on from now on.

Refurbishing a Xpander or a Matrix-12 means a big time investment in
search for all the available parts, investing money for the parts and
doing all the work yourself if you have the technical skills and own the
tools necessary.
Well, I'm relatively good at troubleshooting, the other guys do the dirty work since I'm about as handy as a paralyzed baboon could ever be. I'm pretty confident we'll sort this out with some amount of time. And money. Argh. :-/

The goal is no longer to refurbish, but reconstruct and improve, I'd say. See (x) below.

Noone can expect to buy a piece of gear which cost over 10.000.- bucks
in the past for 2.000 - 3.000 $ now and it?s like new,- that?s stupid.
That wasn't the price I paid, not even close, I happened to pay quite a lot more. Obviously, though, you're talking "in general" and not probably referring to this case, but I'll agree with you completely.

The manufacturing of dyno-synths like Matrix-12 and Prophet 10 / T-8
killed small companies like Oberheim and Sequential in the past because
of the costs and the sales.
I'd say we could blame DX7 and D50 at least partially for that. Them and the evolution of pop taste.

These are the CEM3374, the rotarys and the displays.
Also, I?m not sure about the switches and numeric key pad.
Actually, I doubt the display replacement of Steve Lenham will appear
near future.
(x) Newsflash! The keyboard tech replaced every rotary pot with a similar part and all he had to do was reverse the connection as the spare parts weren't identical to originals. The result: they all work now. If anyone needs further info, let me know and I'll ask dirty details. The feel is similar, but a bit quieter. No more "tr.. tr.. rrr... RRRrrr" whilst editing. The bonus: the pots have a switch built-in, so one could override the push buttons under the display as well if wanted and replace them with a nice led thingy or... never mind. :-)

He was also pretty confident he could replace the displays with an updated part of sorts, but it would lose the "Xpander/Matrix" style. Instead, it would be and LCD (if I remember correctly) and black/white. Again, don't blame me for not asking details before writing.

(Waiting for a FrankenMatrix to resurrect.)

Switches and rotarys as well as displays are 2nd row IMO,- the
workaround is to use bankloader and editing software to use a
electronically working machine in the studio.
I agree, my approach is because of my personal preferences: I like to "feel" the synth.

b.t.w.,- if someone needs processors for Xpander/Matrix-12,- you?ll find
?em in Matrix-1000s (and eventually Matrix-6,- I?m not sure).
As far as I know, there are six CEM3396 IC chips inside. I don't remember Xpander using those - is there something I should know?


Re: cem3374 needed

 

¿ªÔÆÌåÓý


Hi !

If there?s a need for 3374 chips, there?s no hope.

Up to now, I never had a blown 3374 in my Xpander,- but I?m on the waitlist for 3374 @vintage planet for years and like many others are.
CEM3372 are much easier to find.

In addition to vintage planet, which is still a great and helpfull ressource,- Senzo is a nice guy ( ! ) and I apprecate very much this place is existing,- you should check Technology Transplant and Hongkong Superseller ebay shops regulary,- but I?ve never seen any 3374 chips there up to now.

The case:
Buying vintage gear @ebay, you always buy "private" and because of being "vintage" w/ no warranty and no return.
You agree on this if you bid !

If someone is doing this, he should be prepared for issues unless it?s made evident the item is in working condition electronically (!!!).
But there?s no guarantee w/ vintage gear, (tack)-switches and pots will be without issues or the unit won?t blow up the next time you power it up after arrival.
No seller can? guarantee this won?t happen, even he took care on servicing the unit before he?s selling it.

If someone want?s a mint condition piece of vintage gear, a Xpander or Matrix12 in this case, he should buy a refurbished one,- and pay the price !
Refurbishing a Xpander or a Matrix-12 means a big time investment in search for all the available parts, investing money for the parts and doing all the work yourself if you have the technical skills and own the tools necessary.
If you cannot do it yourself, you have to invest more money to pay a experienced tech to do it.

Noone can expect to buy a piece of gear which cost over 10.000.- bucks in the past for 2.000 - 3.000 $ now and it?s like new,- that?s stupid.
The validation of $ a quarter of a century ago and today is a big difference.
The manufacturing of dyno-synths like Matrix-12 and Prophet 10 / T-8 killed small companies like Oberheim and Sequential in the past because of the costs and the sales.

Xpanders and Matrix-12 are very special examples anyway,- some parts inside cannot be replaced , even if the former owner had in mind to do this but can?t.

These are the CEM3374, the rotarys and the displays.
Also, I?m not sure about the switches and numeric key pad.
Actually, I doubt the display replacement of Steve Lenham will appear near future.

If someone has a trashed Xpander or Matrix-12, today, the best way is to buy a 2nd one to make one out of two or to do some resarch in which other synths you?ll find the components you need to get it working and buy these to pull the parts which are unavailable new.

Switches and rotarys as well as displays are 2nd row IMO,- the workaround is to use bankloader and editing software to use a electronically working machine in the studio.

b.t.w.,- if someone needs processors for Xpander/Matrix-12,- you?ll find ?em in Matrix-1000s (and eventually Matrix-6,- I?m not sure).






envia94 schrieb:

?

Hi,

Try:





And, follow , .uk, , , etc. It may take months to find this chip, but you never know...

Good luck!



Re: cem3374 needed

envia94
 

Hi,

Try:





And, follow www.ebay.com, www.ebay.co.uk, www.ebay.de, www.ebay.nl, www.ebay.jp etc. It may take months to find this chip, but you never know...

Good luck!


Re: cem3374 needed

 

--- In xpantastic@..., "mursupeppe" <petri.alanko@...> wrote:

Well, I could, but I've been advised by a much wiser man to just give out a hint of his initials, which in turn resemble an old house music oriented Japanese thingy... ;-)

Yes, you guessed. I felt so let down and cheated that I actually had to find a German-speaking attorney-at-law. It's the principle: you just don't goddamn cheat your synth fellows and that's it. I'm not willing to part with my malfunctioning Matrix, I just want some of my helluvalotta euros back.

Does anyone have any idea where to get a few keys for the keyboard and how to adjust the modulation levers? And where, oh, where, could I find a few oscillators? All hints are still welcome.

Of course I could go for a heavy route and strip the Matrix down, sell its parts and start looking for another. What do you think? Is anybody in need of parts? :-)

-P.

--- In xpantastic@..., "eggwheatis" <phil@> wrote:

Sorry to hear this, you could at least name and shame the scammer?

I was offered a Matrix 12 recently from Germany...when I asked questions about sending photos of test screens he went dead on me...



-- In xpantastic@..., "mursupeppe" <petri.alanko@> wrote:

Hi there,

I'm probably _NOT_ the only one in desperate need, but I'd really, really like to find one or two CEM3374 chips for my Matrix-12 project. I bought from a German guy, insisting everything in it is all right, but it turned out it had "quite a few" problems, among which:

- dead left output
- Midi Out and Thru terminals are quite badly corroded (!)
- at least one CEM3374 is gone, the second one is being tested today
- two CEM3372s are dead
- 13 push buttons are totally dead
- 4 of the rotary encoders are what I call beyond dead

All this with a "yez it'z a perffecktly funkzionink" Matrix-12. :-D Ok, it was relatively cheap and I could turn it into a 6-voice thingy, but that would destroy the profound essence of its beauty. But still I find it very tempting to drive a few kilometers and visit the guy with some ugly motorist friends of mine.

(I know. Violence is _not_ an answer, an aggressive lawyer is. If anyone knows a good German-speaking lawyer, let me know. ;-D Thank goodness I saved all the seller's emails where he was insisting it was a perfectly good, like new.)

Also, I've noticed it has sometimes "a bit" trouble tuning itself, so I'm afraid there are quite a few logic chips malfunctioning as well. How, dear Xpantastic acquaintances, should I start troubleshooting my Matrix - other than doing chip-swapping, which is being done as we spe... write.

-Peter
I am in need of parts however I wouldn't want you to strip down yours, I think yours is worth rescuing perhaps unfortunately not for you but definately for someone. I would maybe try and re-coup some money from this ass and in the mean time stick it up on ebay or the like with all the problems listed and a buy it now price that doesn't do to much damage to your pocket. You might be surprised what you get for it. Alternatively you could try and do it yourself I'm sure it would be satisfying in the end plus you get to know a synth inside out and it's weakness's as you could end up with another dud. I've felt really had a few times when I've bought synths, it's really not a pleasent feeling. Goodluck with whatever you decide I hope it goes well, keep us posted would be nice to hear a happy ending to the story.

Sean


Re: cem3374 needed

mursupeppe
 

Well, I could, but I've been advised by a much wiser man to just give out a hint of his initials, which in turn resemble an old house music oriented Japanese thingy... ;-)

Yes, you guessed. I felt so let down and cheated that I actually had to find a German-speaking attorney-at-law. It's the principle: you just don't goddamn cheat your synth fellows and that's it. I'm not willing to part with my malfunctioning Matrix, I just want some of my helluvalotta euros back.

Does anyone have any idea where to get a few keys for the keyboard and how to adjust the modulation levers? And where, oh, where, could I find a few oscillators? All hints are still welcome.

Of course I could go for a heavy route and strip the Matrix down, sell its parts and start looking for another. What do you think? Is anybody in need of parts? :-)

-P.

--- In xpantastic@..., "eggwheatis" <phil@...> wrote:

Sorry to hear this, you could at least name and shame the scammer?

I was offered a Matrix 12 recently from Germany...when I asked questions about sending photos of test screens he went dead on me...



-- In xpantastic@..., "mursupeppe" <petri.alanko@> wrote:

Hi there,

I'm probably _NOT_ the only one in desperate need, but I'd really, really like to find one or two CEM3374 chips for my Matrix-12 project. I bought from a German guy, insisting everything in it is all right, but it turned out it had "quite a few" problems, among which:

- dead left output
- Midi Out and Thru terminals are quite badly corroded (!)
- at least one CEM3374 is gone, the second one is being tested today
- two CEM3372s are dead
- 13 push buttons are totally dead
- 4 of the rotary encoders are what I call beyond dead

All this with a "yez it'z a perffecktly funkzionink" Matrix-12. :-D Ok, it was relatively cheap and I could turn it into a 6-voice thingy, but that would destroy the profound essence of its beauty. But still I find it very tempting to drive a few kilometers and visit the guy with some ugly motorist friends of mine.

(I know. Violence is _not_ an answer, an aggressive lawyer is. If anyone knows a good German-speaking lawyer, let me know. ;-D Thank goodness I saved all the seller's emails where he was insisting it was a perfectly good, like new.)

Also, I've noticed it has sometimes "a bit" trouble tuning itself, so I'm afraid there are quite a few logic chips malfunctioning as well. How, dear Xpantastic acquaintances, should I start troubleshooting my Matrix - other than doing chip-swapping, which is being done as we spe... write.

-Peter


Re: cem3374 needed

eggwheatis
 

Sorry to hear this, you could at least name and shame the scammer?

I was offered a Matrix 12 recently from Germany...when I asked questions about sending photos of test screens he went dead on me...

-- In xpantastic@..., "mursupeppe" <petri.alanko@...> wrote:

Hi there,

I'm probably _NOT_ the only one in desperate need, but I'd really, really like to find one or two CEM3374 chips for my Matrix-12 project. I bought from a German guy, insisting everything in it is all right, but it turned out it had "quite a few" problems, among which:

- dead left output
- Midi Out and Thru terminals are quite badly corroded (!)
- at least one CEM3374 is gone, the second one is being tested today
- two CEM3372s are dead
- 13 push buttons are totally dead
- 4 of the rotary encoders are what I call beyond dead

All this with a "yez it'z a perffecktly funkzionink" Matrix-12. :-D Ok, it was relatively cheap and I could turn it into a 6-voice thingy, but that would destroy the profound essence of its beauty. But still I find it very tempting to drive a few kilometers and visit the guy with some ugly motorist friends of mine.

(I know. Violence is _not_ an answer, an aggressive lawyer is. If anyone knows a good German-speaking lawyer, let me know. ;-D Thank goodness I saved all the seller's emails where he was insisting it was a perfectly good, like new.)

Also, I've noticed it has sometimes "a bit" trouble tuning itself, so I'm afraid there are quite a few logic chips malfunctioning as well. How, dear Xpantastic acquaintances, should I start troubleshooting my Matrix - other than doing chip-swapping, which is being done as we spe... write.

-Peter


Re: An easy way to dump patches please

 

--- In xpantastic@..., Tony Cappellini <cappy2112@...> wrote:

There's a "Send All" button on the Sysex page in the Xpander.
You can use Midiox (www.midiox.com) to save the patches to a bank file on
the PC.


On Fri, Aug 7, 2009 at 1:31 PM, swisstony123456789 <repoman123@...
wrote:


Hi all I was wondering if someone could help me. Im away from my main pc at
the moment so I cant check for sure but I'm using a piece of software called
midi sx(I think?!?!) to load patches...well I can load patchs fine but I
cant seem to dump could someone please explain simply how to do this using a
free software if possible... as I'm pretty broke....if It's different from
my current software
could someone please explain how to upload aswell...very sorry if this a
real simple question I've been trying to dump them via midi for ages and
cannot seem to get it to work..I actually gave up months ago but after
writing over a couple of patchs I really needed to keep and also going back
to the Xpander this week for work it'd be really really helpful to know.
Anyway thanks for any help in
advance

Sean

P.S. I'm using a PC


Thanks for your reply..I finally sorted the problem I had to change what midi inputs I was using. Also I must have a slightly older firmware as my xpander doesn't offer the option to dump all it just goes to 00. Anyway Thanks again.

Sean


Re: cem3374 needed

 

--- In xpantastic@..., "mursupeppe" <petri.alanko@...> wrote:

Hi there,

I'm probably _NOT_ the only one in desperate need, but I'd really, really like to find one or two CEM3374 chips for my Matrix-12 project. I bought from a German guy, insisting everything in it is all right, but it turned out it had "quite a few" problems, among which:

- dead left output
- Midi Out and Thru terminals are quite badly corroded (!)
- at least one CEM3374 is gone, the second one is being tested today
- two CEM3372s are dead
- 13 push buttons are totally dead
- 4 of the rotary encoders are what I call beyond dead

All this with a "yez it'z a perffecktly funkzionink" Matrix-12. :-D Ok, it was relatively cheap and I could turn it into a 6-voice thingy, but that would destroy the profound essence of its beauty. But still I find it very tempting to drive a few kilometers and visit the guy with some ugly motorist friends of mine.

(I know. Violence is _not_ an answer, an aggressive lawyer is. If anyone knows a good German-speaking lawyer, let me know. ;-D Thank goodness I saved all the seller's emails where he was insisting it was a perfectly good, like new.)

Also, I've noticed it has sometimes "a bit" trouble tuning itself, so I'm afraid there are quite a few logic chips malfunctioning as well. How, dear Xpantastic acquaintances, should I start troubleshooting my Matrix - other than doing chip-swapping, which is being done as we spe... write.

-Peter
Ah yes I feel your anger I two am looking for voice chips, my xpander dropped a voice and is now only running on five. Luckily I got my seller to stump up the cash to fix it. I've always had trouble with big synths and always payed a bit too much...I did want a 12 originally but ended up with the Xpander?!?! Though I do love it. Also think power supply needs re-capping as its getting noisey?! Anyway after swapping chips and finding out which ones faulty by process of elimination I would contact a synth repairer, I realise it can be pricey but will usually avoid any major headaches..things like left output could be a simple dry joint and just need a new bit of solder, a real possibilty if its suffering from a bit of rust around the midi ports, they also are relitively simple to replace. I don't think I've ever heard of that many buttons being dead, could it possibly be a problem with the board or are the 13 dotted about all over the place?!? That could be better than replace all those buttons, also the rotarys would be time consuming. Things like these seem like they'll be easy to replace but can end up being a nightmare I had a simple pot to replace on a Prophet 5 and the nut had fused itself to the pot which meant if I had forced it I would have ripped it off the board. There are a few guys in the UK that deal with Oberheims and parts but...I know that most of them are fully booked for a while, they nearly always are. Wherabouts are you? Sorry I'm not of much help I'm sure someone else will chime in eventually!!

Sean


cem3374 needed

mursupeppe
 

Hi there,

I'm probably _NOT_ the only one in desperate need, but I'd really, really like to find one or two CEM3374 chips for my Matrix-12 project. I bought from a German guy, insisting everything in it is all right, but it turned out it had "quite a few" problems, among which:

- dead left output
- Midi Out and Thru terminals are quite badly corroded (!)
- at least one CEM3374 is gone, the second one is being tested today
- two CEM3372s are dead
- 13 push buttons are totally dead
- 4 of the rotary encoders are what I call beyond dead

All this with a "yez it'z a perffecktly funkzionink" Matrix-12. :-D Ok, it was relatively cheap and I could turn it into a 6-voice thingy, but that would destroy the profound essence of its beauty. But still I find it very tempting to drive a few kilometers and visit the guy with some ugly motorist friends of mine.

(I know. Violence is _not_ an answer, an aggressive lawyer is. If anyone knows a good German-speaking lawyer, let me know. ;-D Thank goodness I saved all the seller's emails where he was insisting it was a perfectly good, like new.)

Also, I've noticed it has sometimes "a bit" trouble tuning itself, so I'm afraid there are quite a few logic chips malfunctioning as well. How, dear Xpantastic acquaintances, should I start troubleshooting my Matrix - other than doing chip-swapping, which is being done as we spe... write.

-Peter


Re: An easy way to dump patches please

 

There's a "Send All" button on the Sysex page in the Xpander.
You can use Midiox () to save the patches to a bank file on the PC.


On Fri, Aug 7, 2009 at 1:31 PM, swisstony123456789 <repoman123@...> wrote:

?

Hi all I was wondering if someone could help me. Im away from my main pc at the moment so I cant check for sure but I'm using a piece of software called midi sx(I think?!?!) to load patches...well I can load patchs fine but I cant seem to dump could someone please explain simply how to do this using a free software if possible... as I'm pretty broke....if It's different from my current software
could someone please explain how to upload aswell...very sorry if this a real simple question I've been trying to dump them via midi for ages and cannot seem to get it to work..I actually gave up months ago but after writing over a couple of patchs I really needed to keep and also going back to the Xpander this week for work it'd be really really helpful to know. Anyway thanks for any help in
advance

Sean

P.S. I'm using a PC



An easy way to dump patches please

 

Hi all I was wondering if someone could help me. Im away from my main pc at the moment so I cant check for sure but I'm using a piece of software called midi sx(I think?!?!) to load patches...well I can load patchs fine but I cant seem to dump could someone please explain simply how to do this using a free software if possible... as I'm pretty broke....if It's different from my current software
could someone please explain how to upload aswell...very sorry if this a real simple question I've been trying to dump them via midi for ages and cannot seem to get it to work..I actually gave up months ago but after writing over a couple of patchs I really needed to keep and also going back to the Xpander this week for work it'd be really really helpful to know. Anyway thanks for any help in
advance

Sean

P.S. I'm using a PC


Re: Full FM-how accurate should I expect?

 

Thanks Karl,

The voices are consistently slightly out of tune on one key, so I am wondering if it's a chip thing-when no FM is employed but the rez is all the way up, you can hear the SLIGHTEST vartiation, but I only notice those particular voices because using FM accentuates the irregularities more so.

The movement factor would certainly indicate something might be loose (though rotating it further forward doesn't rectify anything unfortunately!)

--- In xpantastic@..., "shire03@..." <shire03@...> wrote:


Hello Matt,
When using the FM on an Xpander / M12 you should expect the tuning to
remain consistant between each of the voices. However because of the
very slight drift of the analog VCO's you may find the tone will change
as you play in different ranges of the keyboard. In other words,
If you play the same note repetedly ( with an arppigiator for example)
the tuning should be consistant as you rotate through the voices, but
playing notes at different ranges of the keyboard the tone will change.
B.T.W. The (DAC) control element used for the FM is very precise
compared to the (VCA) control elements used in other parts of the synth.

There are many things that could cause this, but a bad solder connection
or slight oxidation/corrosion between an IC pin and the IC socket, seems
most likly, because you report moving the synth changes it's
performance.

- Karl

--- In xpantastic@..., "mattvrazo" <vrazomatt@> wrote:

I had posted some time ago on here about uneven resonances on my
xpander-bizarrely, it corrected itself when I re-mounted the unit on my
stand and the resonances are perfectly in tune.

However, I noticed when cranking up the FM last night that despite my
best efforts to untune and then retune, I could not get the FM
consistent across the voices. They are not wildly different, but
different enough to make chromatic playing difficult.

There is no consistency between which voices are more in tune with
each other either, so I can't immediately say it's chip related.

So I guess my question is-should I expect the voices to be identical
when full FM (on filter) is used? I seem to recall this being possible
when I first got my unit, but I don't actually use FM that often.


Re: Full FM-how accurate should I expect?

 

Hello Matt,
When using the FM on an Xpander / M12 you should expect the tuning to
remain consistant between each of the voices. However because of the
very slight drift of the analog VCO's you may find the tone will change
as you play in different ranges of the keyboard. In other words,
If you play the same note repetedly ( with an arppigiator for example)
the tuning should be consistant as you rotate through the voices, but
playing notes at different ranges of the keyboard the tone will change.
B.T.W. The (DAC) control element used for the FM is very precise
compared to the (VCA) control elements used in other parts of the synth.

There are many things that could cause this, but a bad solder connection
or slight oxidation/corrosion between an IC pin and the IC socket, seems
most likly, because you report moving the synth changes it's
performance.

- Karl

--- In xpantastic@..., "mattvrazo" <vrazomatt@...> wrote:

I had posted some time ago on here about uneven resonances on my
xpander-bizarrely, it corrected itself when I re-mounted the unit on my
stand and the resonances are perfectly in tune.

However, I noticed when cranking up the FM last night that despite my
best efforts to untune and then retune, I could not get the FM
consistent across the voices. They are not wildly different, but
different enough to make chromatic playing difficult.

There is no consistency between which voices are more in tune with
each other either, so I can't immediately say it's chip related.

So I guess my question is-should I expect the voices to be identical
when full FM (on filter) is used? I seem to recall this being possible
when I first got my unit, but I don't actually use FM that often.


Full FM-how accurate should I expect?

 

I had posted some time ago on here about uneven resonances on my xpander-bizarrely, it corrected itself when I re-mounted the unit on my stand and the resonances are perfectly in tune.

However, I noticed when cranking up the FM last night that despite my best efforts to untune and then retune, I could not get the FM consistent across the voices. They are not wildly different, but different enough to make chromatic playing difficult.

There is no consistency between which voices are more in tune with each other either, so I can't immediately say it's chip related.

So I guess my question is-should I expect the voices to be identical when full FM (on filter) is used? I seem to recall this being possible when I first got my unit, but I don't actually use FM that often.


Re: Xpander power supply rev.2 problems

John Pallister
 

Hi Sergio and Greg,

That xpander.geek.nz site is mine; unfortunately it hasn't turned into
the rhodeschroma.com-like site I wanted it to be, but I'm happy to add
new information to it so that Google can find it easily.

Sergio, if you would like to send me your schematic I'll add it to the
site. I'm pretty sure my Xpander's PSU is American, so the capacitor
values might not be much use to you.

I would think that these days it should be pretty straightforward to
just replace the whole PSU with a new one, don't you think? I don't
think there are any really weird voltages in there.

Anyway, all the best with sorting it out.

Cheers,

John :^P
--
John Pallister
john@...
john@...

On Tue, Jun 30, 2009 at 6:52 PM, baumont987<geebeex@...> wrote:


Hi,

maybe this can help you:



regards,
/greg.

--- In xpantastic@..., "kovalmoog67" <synthoma@...> wrote:

Hi to all members...
I'm Sergio Koval, from Barcelona, Spain.
A friend of mine gaves me his Oberheim Xpander that has a very big problem
on its Power Supply, and I can't be able to find any info about it. It is
the second version of the Xpander, manufactured in Japan, and the Power
Supply is completely different from the service manual's one.
I have released my own schematic of it, taken from the PCB I have, but
there are some missing components (mainly resistors and capacitors) and I
don't have any idea about their values.
If any user of that version of Xpander could take a detailed photo of its
Power Supply board, it would be very useful to me. I could get the values
from that image.
I have been told that version of Xpander was sold in Japan and Australia.
My friend's one came from Australia.
Any help or suggestion will be very welcome.
Thanks in advance
Sergio


Re: Xpander power supply rev.2 problems

 

Hi,

maybe this can help you:



regards,
/greg.

--- In xpantastic@..., "kovalmoog67" <synthoma@...> wrote:

Hi to all members...
I'm Sergio Koval, from Barcelona, Spain.
A friend of mine gaves me his Oberheim Xpander that has a very big problem on its Power Supply, and I can't be able to find any info about it. It is the second version of the Xpander, manufactured in Japan, and the Power Supply is completely different from the service manual's one.
I have released my own schematic of it, taken from the PCB I have, but there are some missing components (mainly resistors and capacitors) and I don't have any idea about their values.
If any user of that version of Xpander could take a detailed photo of its Power Supply board, it would be very useful to me. I could get the values from that image.
I have been told that version of Xpander was sold in Japan and Australia. My friend's one came from Australia.
Any help or suggestion will be very welcome.
Thanks in advance
Sergio


Xpander power supply rev.2 problems

kovalmoog67
 

Hi to all members...
I'm Sergio Koval, from Barcelona, Spain.
A friend of mine gaves me his Oberheim Xpander that has a very big problem on its Power Supply, and I can't be able to find any info about it. It is the second version of the Xpander, manufactured in Japan, and the Power Supply is completely different from the service manual's one.
I have released my own schematic of it, taken from the PCB I have, but there are some missing components (mainly resistors and capacitors) and I don't have any idea about their values.
If any user of that version of Xpander could take a detailed photo of its Power Supply board, it would be very useful to me. I could get the values from that image.
I have been told that version of Xpander was sold in Japan and Australia. My friend's one came from Australia.
Any help or suggestion will be very welcome.
Thanks in advance
Sergio


3 NOS HS3140-C 14 bits DAC for Xpander

 

Hi all,

FYI, someone is selling 3 new old stock 14 bits DAC for Xpander on Ebay:



/greg


Poll results for xpantastic

 

The following xpantastic poll is now closed. Here are the
final results:


POLL QUESTION: Let's do some market research: So, how many spare Xpander/M12 displays would You buy, if they would be made available?

This is ofcourse not anything binding information, but just a poll.

CHOICES AND RESULTS
- 0, 3 votes, 8.11%
- 1, 5 votes, 13.51%
- 2, 1 votes, 2.70%
- 3, 16 votes, 43.24%
- 4, 4 votes, 10.81%
- 5, 0 votes, 0.00%
- 6, 3 votes, 8.11%
- 7, 0 votes, 0.00%
- 8, 0 votes, 0.00%
- 9, 2 votes, 5.41%
- 10-15, 2 votes, 5.41%
- 15-20, 0 votes, 0.00%
- 20-25, 1 votes, 2.70%
- 25-30, 0 votes, 0.00%
- 30-40, 0 votes, 0.00%
- 40-50, 0 votes, 0.00%
- 50-60, 0 votes, 0.00%
- 60-70, 0 votes, 0.00%
- 70-100, 0 votes, 0.00%
- 100-200, 0 votes, 0.00%
- 200-300, 0 votes, 0.00%
- 300-400, 0 votes, 0.00%
- 400-500, 0 votes, 0.00%
- 500-600, 0 votes, 0.00%
- > 600, 0 votes, 0.00%

INDIVIDUAL VOTES
- 0
- drmabuce@...
- xpander@...
- cremoni@...
- 1
- maf@...
- synthesizeuhr@...
- geebeex@...
- cappy2112@...
- dedonatis@...
- 2
- mbeck@...
- 3
- jbond007@...
- josue@...
- repoman123@...
- matrixsynth@...
- publik@...
- shire03@...
- caractere@...
- waveterm@...
- chad_kettering@...
- tomas_peterka@...
- plus_321@...
- jeremy@...
- james@...
- ha-pewe@...
- antoniotuzzi@...
- Rookwood1@...
- 4
- john@...
- k.tomasson@...
- wdw.synths@...
- mariano@...
- 5
- 6
- cikira@...
- steeve_sos@...
- dalimaster2004@...
- 7
- 8
- 9
- vco3@...
- thanksmalc@...
- 10-15
- akva@...
- rwillis@...
- 15-20
- 20-25
- chenedward69@...
- 25-30
- 30-40
- 40-50
- 50-60
- 60-70
- 70-100
- 100-200
- 200-300
- 300-400
- 400-500
- 500-600
- > 600


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