Re: voltage conversions?
2007-07-21 by duncan
... its european) I ve been running it through a stepdown transformer. My question is, is there anyway to permanently change the voltage so that I can just
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Re: voltage conversions?
2007-07-17 by painintheamp
... I just posted a link to the site for JX3P diagrams. So much cool stuff on the web!! Scott
Re: [vintagesynthrepair] voltage conversions?
2007-07-17 by scott frye
If you can find an electrical diagram , there might be a place on the AC transformer OR on the power supply board to change the line voltage. It might entail a
voltage conversions?
2007-07-17 by ianjameshicks
Hello, I recently aquired a roland jx3p that operates on 230v (I m assuming its european) I ve been running it through a stepdown transformer. My question is,
Oberheim Xpander Eproms
2007-07-16 by Miguel Mendoza
Hello group, does anybody have the eproms files for the Oberheim Xpander? I don t know exactly wich board version I have, any version will be wellcome. Thanks
Re: Roland Jupiter 8 questions
2007-07-11 by gil_we
Common man.... you just found a midi equipped JP8 !!! Grab it before it s too late !!! ... variable ... the ... bit? ... and
Re: Repairing Korg MiniKorg 700s
2007-07-10 by alpha5000dk
Yes, you should invest in some new wood side panels. I feels actually like the lil beast is sounding even better than before ;-D Greetings alpha5000dk -
Roland Jupiter 8 questions
2007-07-09 by easterleggs
Hi, group. I was fortunate enough to acquire a Roland Jupiter 8 w/Encore MIDI recently. I ve determined that it is the 12 bit version with variable split
RE: [vintagesynthrepair] Repairing Korg MiniKorg 700s
2007-07-07 by Oliver Abplanalp
Your minikorg looks great with these new side panels - probably I should do the same with my two Minikorgs (700 and 700s). The original panels are a bit
Re: Beat up Korg 770 diy pimp-up project - need advice!
2007-07-07 by alpha5000dk
Hi! You can find schematics and more on almost every vintage Korg synthesizer at this web address http://www.korganalogue.net/ Good luck with your project :-)
Repairing Korg MiniKorg 700s
2007-07-07 by alpha5000dk
Hi Group! I ve uploaded a couple of pics of my Korg MiniKorg 700s with new wood side panels in the photo album. Link:
Beat up Korg 770 diy pimp-up project - need advice!
2007-07-06 by lostinpurdy
Hello, everyone! What can I say? I got this beat up korg 770 which technically works (surprisingly) despite it s bad shape, by that I mean that the side panels
Re: Minimoog Resonance Potentiometer
2007-07-03 by ambrosia800
Update: changed the Pot! Works fine! Unit now behaves like it should, with the Reverse characteristics... Sound is good, only some tuning to do... this will
RE: [vintagesynthrepair] Re: Wurlitzer Organ repair help
2007-07-01 by Keith Niver
Call Morelocks and get a service manual to start. If you are familiar with tracing circuitry, then you can probably find the problem. I am betting on a problem
Re: Wurlitzer Organ repair help
2007-07-01 by Kate
Thank you all very much for taking time to respond. I checked all the plastic sticks that activate the contacts, they are all in place. I cleaned the contacts
Re: Korg MS-20 with a few problems
2007-06-29 by leitner6
The schematics are here. http://www.korganalogue.net/korgms/service/ms20/m20s.html#3 (This looks like its the early MS-20 version with the Korg-35 filter. I
Re: polysix VTL5C3 opto coupler
2007-06-29 by nanomole39
Thanks,just ordered some from them today ! ... for only ... sourcing
Re: [vintagesynthrepair] polysix VTL5C3 opto coupler
2007-06-28 by no freq
You can find them at smallbear. http://www.smallbearelec.com/Detail.bok?no=347 Shipping to UK won t be expensive, I received some items a week ago for only $3
polysix VTL5C3 opto coupler
2007-06-28 by nanomole39
Hi i am after the above or an equiv but had no success in sourcing them,if anyone can help please mail me,i am in the UK.
Korg MS-20 with a few problems
2007-06-28 by Royalston
Hi Im new to this group... Ive got an MS-20 which was working fine when i bought it, but has recently had a few functions fail on me. I was hoping people
RE: [vintagesynthrepair] Wurlitzer Organ repair help
2007-06-28 by Keith Niver
Sometimes it s hard to remember what happened yesterday. But when you work on them all the time, it s hard to forget. Keith ... From:
RE: [vintagesynthrepair] Wurlitzer Organ repair help
2007-06-27 by John Keeley
Sorry ,got it backwards. Sometimes it s hard to remember much of the 70 s . John Keith Niver wrote: Hi John. We were a Wurlitzer dealer
RE: [vintagesynthrepair] Wurlitzer Organ repair help
2007-06-27 by Keith Niver
Hi John. We were a Wurlitzer dealer from 1957-mid 80 s when they were sold to Baldwin. I ve been a tech since 1968. Pedals have always been low note
Re: [vintagesynthrepair] Wurlitzer Organ repair help
2007-06-27 by John Keeley
My Mother was a Wurlitzer dealer in the 60 s-70 s . If I remember ,the pedals used a nylon stick that ran from the pedal to the contact switch .They were
RE: [vintagesynthrepair] Wurlitzer Organ repair help
2007-06-27 by Keith Niver
These organs used only a single contact for the pedals. It sounds like you may have a circuitry problem on the pedal board. If the contacts are bent and not
Re: [vintagesynthrepair] Wurlitzer Organ repair help
2007-06-27 by James Cason
... If I remember correctly (it has been a while) that model Wurlitzer used a key contact that had both a normally closed part and a normally open part. I used
Wurlitzer Organ repair help
2007-06-25 by Kate
I could use some suggestions to repair my Wurlitzer Model 4373. I inherited it from my Uncle recently. It appears that it had not been played in quite a while,
Re: Minimoog Resonance Potentiometer
2007-06-25 by ambrosia800
Thanks! Great explanation. In the meantime I managed to find a suitable pot. I was a little bit hesitating because I always thought, that there is a special
Re: Minimoog Resonance Potentiometer
2007-06-24 by duncan
generally speaking, audio in the context of a variable resistor means logarithmic taper . rev is an additional indication that the taper should be
Re: Minimoog Resonace Potentiometer
2007-06-24 by Heiko Mehring
Hello Ambrosia800, the service manual of the minimoog just says, that it is a rotary pot, rev audio, 50k Ohm. I don`t know, what rev means, but audio is right,
Re: Estradin Altair 231 Russian Synth
2007-06-21 by ambrosia800
Update.... I checked the Pot, it is a linera one, because the Russians used to have only this type. It has to be a Reverse logarithmic one with 50kOhms, like
korg polysix KLM367 Replacement ?
2007-06-21 by nanomole39
Hi Folks!,i am in need of the above tested and working if possible.mine has had the usual battery leak and iv never seen one so bad as it has obliterated the
Re: Replacing tantalum caps with electrolytic caps
2007-06-20 by duncan
my understanding of the use of tants & cans in circuits was this: electrolytics are cheap & good in situations where you need a big bucket for charge, such
Re: [vintagesynthrepair] Re: Replacing tantalum caps with electrolytic caps
2007-06-20 by Roy J. Tellason
... More like -20%/+80% in many instances. Most caps that I ve checked with my capacitance checker read way higher than the marked values. Also, a lot of
Re: [vintagesynthrepair] Replacing tantalum caps with electrolytic caps
2007-06-20 by Scott Nordlund
... It depends on how the caps are used in the circuit. Aluminum electrolytic and tantalum capacitors have different characteristics- in certain cases, it
Re: [vintagesynthrepair] Replacing tantalum caps with electrolytic caps
2007-06-19 by John Brewer
Yes, you can. As far as I am concerned Tants are great if you are cramped for space and not using them where there is likely to be lots of ripple (power
Re: [vintagesynthrepair] Re: Replacing tantalum caps with electrolytic caps
2007-06-19 by Peter Bye
Don t do it. Replace the components with the original type and values. Electrolytics have both a definite shelf and operational life. Currently about 2000
Re: Replacing tantalum caps with electrolytic caps
2007-06-19 by gil_we
They short... ... are ... safe
Re: Replacing tantalum caps with electrolytic caps
2007-06-19 by gil_we
Thanks Jim !
Re: [vintagesynthrepair] Replacing tantalum caps with electrolytic caps
2007-06-19 by James Cason
... It would be safe for the limited purpose that there would be no physical danger caused. Tantylum capacitors are a special form of electrolytic capacitors
Re: [vintagesynthrepair] Replacing tantalum caps with electrolytic caps
2007-06-19 by Tom Thornton
Please, How did you know they were blown ?? ... -- Tom Thornton Cincinnatti Nbr 3 Morristown NJ USA Madison Nbr 93 Madison NJ ST Johns Nbr 1
Replacing tantalum caps with electrolytic caps
2007-06-19 by gil_we
Would it be safe to replace all the tantalum caps in my OBXa with regular electrolytic caps (as long as their of the same specs of course) ?... I had 3 blown
Minimoog Resonace Potentiometer
2007-06-19 by ambrosia800
Hi, there! Can anybody tell me of which type is the Resonance Pot on a Minimoog, low serial number? Should be a reverse taper pot, but how many KOhms, and what
I seek a schematic of the Korg FK-4 pedal.
2007-06-14 by fripon_tournemolle
Hello, I own a Korg PE-1000. I d like to use the traveler with a FK-4 or a clone of this pedal. Where could I find a schematic of this pedal? Thank You,
Wersi MK1 resources
2007-06-13 by Scott Nordlund
Does anyone know of any good resources (aside from the obvious, going directly to the company, etc.) for information (general info, schematics, information
WTB an OBXa voice card....
2007-06-12 by gil_we
Lemme know if you got any for sale ;) gilwein@walla.co.il
Estradin Altair 231 Russian Synth
2007-06-12 by ambrosia800
Hi, there! Has anybody out there any experience with an Estradin Altair 231? I just got one, and there are a few strange things: - filter resonance is sounding
Re: [vintagesynthrepair] 60hz Hammond in a 50hz environment - dangerous ?
2007-06-09 by Malte Rogacki
... Basically the previous replies already gave all the important stuff. But there s more. There are very few parts in a Hammond that actually see the AC and
Re: [vintagesynthrepair] 60hz Hammond in a 50hz environment - dangerous ?
2007-06-09 by Roy J. Tellason
... Aside from what other folks have mentioned, I d check the power transformer to see if it s running excessively hot. If not, then you probably don t need
Re: [vintagesynthrepair] 60hz Hammond in a 50hz environment - dangerous ?
2007-06-08 by James Cason
... If the G is like a CV, the power transformer only feeds a low-power preamplifier. Considering the way that the Hammonds were built, it is highly probable