Re: [vintagesynthrepair] IC needed for Polymoog kbd
2013-09-05 by nemesisem@...
Thanks all for the great help, seems that there is surprisingly many sources for the component nowadays, after all... What a great forum this is :) cheers, Ami
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RE: Re: [vintagesynthrepair] IC needed for Polymoog kbd
2013-09-04 by <nanodocl@...>
here is another source, cheaper and smaller i think http://www.flatkeys.co.uk/MM5823N.html --- In vintagesynthrepair@yahoogroups.com,
Re: IC needed for Polymoog kbd
2013-09-04 by Paul
Hi Ami, You are right, they do seem to be hard to get, but they are just simple dividers, here is a link to an emulator, see what you think.
Alpha Juno 2 Aftertouch
2013-09-04 by Marcelo Malmierca
I need to replace the aftertouch FSR strip of an Alpha Juno 2, any one know were to buy one ? Thanks in advance Marcelo Malmierca
Re: [vintagesynthrepair] IC needed for Polymoog kbd
2013-09-04 by Dennis Matana
hi look here for a replacement http://www.organservice.com/crm/topdividers.htm#Fig16 good luck fixing your polymoog. 2013/9/4 ... hi look
IC needed for Polymoog kbd
2013-09-04 by nemesisem@...
Hi!!! I think it is high time to repair a couple of issues regarding my Polymoog keyboard and my main problem is that a couple of Cs on the keyboard do have
RE: Moog MG1 replacement transformer?
2013-09-04 by <ferrograph@...>
afaik, the power supply in the MG-1 is the same as in the rogue, that is to say, two 12V regs (one +ve, one -ve) fed from a bridge rectified 24V ac. in the
Moog MG1 replacement transformer?
2013-09-03 by pushwithlegs
hey all, in the process of repairing a Moog MG1 and upon open found the transformer to be literally disintegrating (held together with duct tape!) does any one
Re: [vintagesynthrepair] Re: Hammond piper
2013-09-03 by Nano
Hi Nicolas, I think I found the model number, is the autocord 730. Nano ... Hi Nicolas, I think I found the model number, is the autocord 730. Nano El
Re: [vintagesynthrepair] Re: Hammond piper
2013-09-03 by nanodocl
Hi Nicolas, Thanks for your answer. The problem is when I turn on the solo instruments, a high frecuency note (E note) came out of the speaker (very soft, but
Re: Hammond piper
2013-09-03 by Nicolas
What is the problem with your Piper? Nicolas
Re: Hammond piper
2013-09-03 by Nicolas
Hi, Yes, I have that service manual. But I think there is a few different versions. The one I have is for models 3100, 3200, 727 and 730. This is a pretty big
Re: [vintagesynthrepair] RE: WTB ARP Odyssey Pitch Bend Knob
2013-08-31 by Paul Krull
Thanks for the tip. I ve been playing the Odyssey with an ARP sequencer and it s more or less all the except for the keyboard and lots of stiff and dirty
RE: WTB ARP Odyssey Pitch Bend Knob
2013-08-31 by <sneakyflute@...>
Hey Paul. ebay seller syntronics from MA, had a few up on ebay a month or so ago (15 dollars each shipped, I think). You could try to email him and see if he
Hammond piper
2013-08-31 by <nanodocl@...>
Hello, Does anyone have a hammond piper service manual or schematic? thanks!
WTB ARP Odyssey Pitch Bend Knob
2013-08-31 by Paul Krull
So I get up the nerve to demand my beloved Odyssey back after more than 8 months of non service and they hand it back to me with no pitch bend knob. I am
RE: Re: [vintagesynthrepair] RE: Moog Source LFO/Clock Troubles
2013-08-29 by <gerryrdahl@...>
Hi Paul, That s good, and so they should. I stand behind all my work. Let me know if you need anything; analog synth related :). GD ... Thanks for the kind
Re: [vintagesynthrepair] RE: Moog Source LFO/Clock Troubles
2013-08-29 by Paul Krull
Thanks for the kind offer but the Ratbags who were supposed to be fixing it have corrected that problem on their dime. Thanks
RE: Moog Source LFO/Clock Troubles
2013-08-29 by <gerryrdahl@...>
Hi Paul, The DEMUX on the source is on the analog board, so if it was a bent pin you would have another item or 2 that might not work. If you don t mind
Re: Moog Source membrane switches
2013-08-26 by Nicolas
Hi, I ordered a membrane switch panel from Technology Transplant and it never arrived. After a month I contacted them but they never replied. So, I asked
Moog Source LFO/Clock Troubles
2013-08-24 by Paul Krull
Hi Folks: I just picked up my Moog Source that’s been languishing at American Music Seattle for 8 MONTHS where it went in for battery replacement and
koprg kr33 power supply replacement help needed
2013-08-20 by fainardi83
hello all i have a korg kr33 rythm box it doesn t startup the problem is the +5v power supply build withj a zener and a big resitor 1W i want to replace the
Re: [vintagesynthrepair] Re: Sequential Circuit Pro One UPD8021 chip
2013-08-16 by Philip
The original chip is custom programmed during manufacture. You d have to find one that had actually been pulled working from a Pro-One.. Basically impossible
Re: Sequential Circuit Pro One UPD8021 chip
2013-08-16 by Nicolas
Hi, I sent him a message and I think it s the same guy. He s on vacation too. The price is 120$ + shipping which seems a little bit high to me. I d like to
Re: Sequential Circuit Pro One UPD8021 chip
2013-08-16 by grantpbt
The seller is on vacation, but more info here: www.musictechnologiesgroup.com GB
Re: Sequential Circuit Pro One UPD8021 chip
2013-08-16 by John Daniels
A quic k search on ebay for 8021 midi in completed listings throws up three recent hits from seller grantp bt. It seems he lists the item once a month so you
Re: [vintagesynthrepair] Sequential Circuit Pro One UPD8021 chip
2013-08-15 by James Gallant
There s an eBay seller (based in California I think) that has two different 8021 replacements specifically for the Pro-One. One replaces the original functions
RE: [vintagesynthrepair] Sequential Circuit Pro One UPD8021 chip
2013-08-15 by tim p
http://cpluselectronics.com/u__UPD8021C048.html Unsure if this *really* means that they can source though ________________________________ From:
Sequential Circuit Pro One UPD8021 chip
2013-08-15 by Nicolas
Hi everybody, I m looking for a UPD8021 microcontroller chip for a Sequential Circuit Pro One synthesizer. Does anybody knows a source or a replacement for
RE: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-15 by Hugh Vartanian
Excellent advice! Hugh
RE: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-12 by Lorne Hammond
Look for the obvious, transistors accidentally swapped that have different pin outs/ins, or an old part that had a non-standard pin pin configuration because
Re: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-12 by Daniel Forró
Maybe there are some Ozzies here, I m not so far - in Japan, just behind the corner and then to the left. I still fight with repairs of my Yammies - SY1 (some
Re: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-12 by eidorian@...
Hi Hugh, Thanks for your email and sorry for the slow response. I ve been doing too much other non-electronics stuff lately :-( At the moment the +15V rail is
Re: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-07 by Hugh Vartanian
Hi Adrian, I have been offline for a bit. Can you re-cap (! ) where the circuit is at today? Is your post of 8/1 the latest? I confess to being a little
Re: CS-70m power supply issue, -15V rail is dead
2013-08-07 by cpt.zilog
... I don t think so ;-) As I said, it works quite nicely already, why should I bother NOT changing the capacitors and thus investigating elsewhere ? :-) The
Re: [vintagesynthrepair] Quadrasynth parts...
2013-08-04 by jammie
try syntaur as the qs range use fatar keys and there will be parted synths that the keys will fit thats http://www.syntaur.com/alesis_qs.html ... From: Jim
Quadrasynth parts...
2013-08-04 by Jim Blair
I know it s a long shot, but is anyone here parting out a QS? The synth works perfectly, but has a single broken key. Thanks!
Re: YAMAHA SY77 freezes
2013-08-03 by m.sislack
Hi Royce, i´s been quite a long time, but now I could get back to my project bringing the sy77 back to life. So what did I do? I bought a second one an now,
Re: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-03 by Adrian Corston
... Thanks! ... Interesting - maybe it is some sort of oxidization that is temperature-dependent? Sounds like you should break out /your/ scope and measure
Re: CS-70m power supply issue, -15V rail is dead
2013-08-02 by cpt.zilog
Well then best of luck with your repair. After all the work you ve done to your psu, you deserve the right to succeed ! :) I will have to recap my cs-70m s
Re: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-02 by Adrian Corston
Thanks for the multimeter suggestion, but I decided it was past time to get the CRO (a Tektronics 465M) out anyway so I could have a good look around and be
Re: CS-70m power supply issue, -15V rail is dead
2013-08-02 by cpt.zilog
All right and thanks for your message(s)! You don t have to use a scope to test for AC leakage. A multimeter can do the job. Set it to AC voltage test and
Prophet 5 3.2 dead voice not CEM related
2013-08-02 by cxacxu
I ve got a troublesome P5 rev3.2 here that has a dead voice no. 4 vco B, vco A is ok. The CEM is not the problem, I ve traced back through the S/H circuit I
Re: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-02 by eidorian@...
I m sorry, not at all! I just haven t been able to get to my venerable old Tektronics CRO, which is buried at the rear of my shed behind an enormous pile of
Re: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-01 by Peter Mörck
I don t think there was anything stupid in your post :) In a previous reply I think I did ask him to check the rectifier and for the presence of AC using a
Re: CS-70m power supply issue, -15V rail is dead
2013-08-01 by cpt.zilog
Excuse me but I d like to know if I did say something false or stupid in my previous message ? Don t want to sound rude, but if my idea is wrong, my ego can
Re: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-01 by Peter Mörck
Hi again, I m pretty sure IC2 is not used as a voltage-follower as there is no DC feedback. The 47nF cap is most likely used to reduce amplification for AC (so
Re: [vintagesynthrepair] Re: CS-70m power supply issue, -15V rail is dead
2013-08-01 by Adrian Corston
Hi Gerry, Thank you for your advice. I have the +10V and -5V rails working right now - and you were pretty-much spot on with that resistor guess (although for
Re: CS-70m power supply issue, -15V rail is dead
2013-08-01 by gerryrdahl
Hello, Have you checked the .22ohm 1 watt (1P?) resistor? I just repaired a Yamaha CS40M that had that resistor out (.47 on the CS40M) and that was the cause
Re: CS-70m power supply issue, -15V rail is dead
2013-07-28 by cpt.zilog
Hello guys and sorry to jump in like that but I would suggest to change the big caps as a priority and then check the bridge rectifier again for leakage of AC