Re: [vintagesynthrepair] Voice Problem with my JX-8p
2013-04-23 by Michael Blatnik
Hi, thank you very much, also for the link (this helps:)). i´ll have a look Michael ________________________________ Von: Nick Bell
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Re: [vintagesynthrepair] Voice Problem with my JX-8p
2013-04-22 by Nick Bell
I had a similar problem with a JX3P. There is a test mode where you can go through each of the 6 channels to confirm which is at fault. Once confirmed check
Voice Problem with my JX-8p
2013-04-22 by blatnik_michael
hello, I have a problem with my jx-8p. i think one of the 6 voices has a problem with osc2. every 6th sound is playing osc1 with the correct vokume, osc2 is
Re: [vintagesynthrepair] Re: Juno 106 chips Analogue Renaissance
2013-04-21 by Hugh Vartanian
Yes, the pads on the ceramic module are fragile and I m not sure of the solder formulation. Difficult to even resolder pcb pins pads. I used a fine needle
Solton TS4k Keyboard Power supply
2013-04-18 by Felix Rios
Hi all some one know how is the Power connection for this ? or the power supply diagram or service manual thanks
Re: [vintagesynthrepair] Cap substitution
2013-04-18 by Daniel Forró
Brian, thanks for confirmation! Daniel ... Brian, thanks for confirmation! Daniel On 19 Apr, 2013, at 12:31 AM, Brian wrote: Yes Daniel. Sent by. Brian G3OYU.
Re: [vintagesynthrepair] Cap substitution
2013-04-18 by Brian
Yes Daniel. Sent by. Brian G3OYU. ... Yes Daniel. Sent by. Brian G3OYU. On 18 Apr 2013, at 16:12, Daniel Forró wrote: I can t find
Re: [vintagesynthrepair] Cap substitution
2013-04-18 by Daniel Forró
I can t find 5600 uF/40 V capacitor (for power supply unit in Yamaha CS80). Is it possible to use 6800 uF/50 V? Daniel Forro
Re: Juno 106 chips Analogue Renaissance
2013-04-16 by Nicolas
Hi, I removed the coating on the original 80017 chips by soaking them in acetone. It took about a week to completely remove the coating. I reinstalled the
Re: [vintagesynthrepair] Arp ProSoloist and ProDGX.
2013-04-14 by Terje Winther
... Yes I think so. ... Pro/DGX all seem to have 4075 filter. Never seen a Pro-soloist with one, as they all have 4034. Seems to fit, as they are not directly
Re: [vintagesynthrepair] Re: Roland TR707
2013-04-14 by Nick Bell
Thanks Francois, will def build one of them. ________________________________ From: alesisfusion8hd To:
Re: Roland Saturn SA-09
2013-04-14 by synthparts
I have that switch in stock. Doug www.synthparts.com
Re: [vintagesynthrepair] Roland Saturn SA-09
2013-04-13 by Daniel Forró
Have you tried www.syntaur.com or www.vintageplanet.nl? Daniel Forro
Roland Saturn SA-09
2013-04-13 by Paul Cunningham
Hello -- Been a little while since I ve had to repair anything, but I ve recently acquired a Roland Saturn SA-09. They look something like this:
Re: [vintagesynthrepair] Roland TR707
2013-04-12 by Paulo Palmieri
Hi Nick, I already replaced the 603 transistor in a Juno 106 and i used 2SC1815 as a replacement according the Juno 106 service notes. It works perfectly. And
Re: Roland TR707
2013-04-12 by alesisfusion8hd
Hi Nick, hard to nail the cause without a good tool. Maybe you should consider building a cheap logic probe: http://www.swansontec.com/sprobe.html Will
Roland TR707
2013-04-12 by Nick Bell
Hi, I m working on a 707 with no midi out. I suspect Q6 which is a 603 58F - does any one know a suitable replacement & where I might source one? Could be
E-mu Proteus 2000 cct diag
2013-04-12 by Royce
Any one with any service data on these racks (Proteus 2000, XL1 Turbo, MoPhatt Turbo, Virtuoso 2000 etc) I have intermittent distortion on the main outputs and
Re: [vintagesynthrepair] Re: Recapping
2013-04-10 by Hugh Vartanian
Hi Richard, A 50V cap in place of a 35V part will be just fine. I m not sure where I picked up the idea that it wasn t a great idea to use, for example, a 450V
Re: [vintagesynthrepair] Re: Recapping
2013-04-10 by Mike Kearney
For recapping tube Hammonds, old tube radios and a Forbes-design tube Theremin I built, I ve had very good luck dealing with http://justradios.com/ There have
Arp ProSoloist and ProDGX.
2013-04-10 by Jim Blair
I m trying to make some sense of these nice little synths. Info is a bit scarce though. It appears that there were four versions of the Arp Prosoloist. The
Re: [vintagesynthrepair] Re: Recapping
2013-04-10 by Richard van der Meer
Thanks Hugh for all this great info. regarding caps if i replace a 35V version with a 50V version (which i have laying around) would that be OK or would it be
Re: Recapping
2013-04-10 by hughvartanian
The old electrical engineers vote, in agreement with Scott from Ohio, to respect the original design intent and replace the tantalum caps with tantalum caps.
Re: Yamaha CS40m problem
2013-04-09 by lotus45356
That should be (connector C6), not (connector C60. Hadn t had my coffee yet.
Re: [vintagesynthrepair] Recapping
2013-04-09 by Daniel Forró
Thanks for your perfect explanation! Daniel Forro
Re: [vintagesynthrepair] Yamaha CS40m problem
2013-04-09 by Daniel Forró
Hi, Scott, thanks for your time and consideration. I ll try later and let you know... Daniel Forro ... Hi, Scott, thanks for your time and consideration. I ll
Re: [vintagesynthrepair] moog sonic six woes...
2013-04-09 by Mike Kearney
I m just a hobbyist, but if it were me, I would socket and replace IC10 and IC11 (both 723 s) as well as all electrolytics (C4, C5, C7, etc.), diodes and the
Re: [vintagesynthrepair] Yamaha CS40m problem
2013-04-09 by 65 Lotus
On the DM board, check the capacitors on the ±15 volt power rails (connector C60. See if they re tantalums and shorted. There s two by the connector, but two
Re: [vintagesynthrepair] Yamaha CS40m problem
2013-04-09 by Daniel Forró
Recently I tried to switch on my two CS40m synths which I have used for the last time about 7 years ago. Main fuse on both machines was blown after one second.
Re: [vintagesynthrepair] Re: Recapping
2013-04-09 by Daniel Forró
Thanks for all answers to my questions. Daniel Forro
moog sonic six woes...
2013-04-09 by sinthinoakland
I just bought a sonic six, and when I fired it up, there was a brief moment when all was well and the unit was working, but then it became unresponsive. Upon
Re: Recapping
2013-04-08 by shupac800
Alexis has it right -- tantalums were used because they pack a lot of capacitance into a very small package. (Low ESR is good too.) Tantalums are used a lot
Re: [vintagesynthrepair] Recapping
2013-04-08 by Alexis V. Rogers
I always replace tantalums with electrolytics unless a client asks me to do otherwise. ... I always replace tantalums with electrolytics unless a client asks
Re: [vintagesynthrepair] Recapping
2013-04-08 by 65 Lotus
Internally tanatlums look like a sponge where their charging surface area is exposed in 3-dimensions, whereas electrolytics are a couple of wound, flat pieces
Re: [vintagesynthrepair] Recapping
2013-04-08 by Daniel Forró
Thanks for your explanation and the link. So can I take it as a rule of thumb and change all tantalum (in PSU, logic circuits or audio circuits) for low ESR
Re: [vintagesynthrepair] Recapping
2013-04-08 by Alexis V. Rogers
Tantalums were used due to size and lower ESR. You can get low ESR electrolytics these days. The problem with tantalums is that they close (short) when they
Re: [vintagesynthrepair] Force sensor
2013-04-08 by Daniel Forró
Thanks for answer, that gives me some hope. I ve found this one, and only this one, but was not sure if it can be used. I ll give it a try. Daniel Forro
Re: [vintagesynthrepair] Force sensor
2013-04-08 by evening1
I have successfully used the 24 FSR strip from interllink technologies as a replacement in a Pro DGX. It;s a few inches longer than needed but there s room to
Re: [vintagesynthrepair] Recapping
2013-04-08 by Daniel Forró
As I m working recently on recapping of all my machines older than 20 years, I d like to ask more experienced colleagues here few questions: - In Old Crow s
Re: [vintagesynthrepair] Force sensor
2013-04-08 by Daniel Forró
I m working on the renovation of my Multimoog and ARP Pro Soloist/DGX. Both have not fully working keyboard aftertouch sensor stripe. Does somebody know where
1978 Hammond Organ boards/parts available
2013-04-07 by hughvartanian
I recently recycled a 1978 Hammond organ and saved the boards. They are available for purchase (make an offer, I m easy), trade (maybe some tubes, filter caps
Re: Juno 106 chips Analogue Renaissance
2013-04-07 by hughvartanian
I rebuilt a 106 recently and cleaned the chips so you needed sunglasses to look at them, even under most all of the IC pins. Still, I had some leakage on a
Re: [vintagesynthrepair] Juno 106 chips Analogue Renaissance
2013-04-07 by Terje Winther
Yes, they are still around. A bit slow business, but very good products. ... Terje Winther terje.winther@wintherstormer.no http://wintherstormer.no/
Re: Juno 106 chips Analogue Renaissance
2013-04-07 by Nicolas
Hi, Thank you for replying. I will try that and let you know if it worked. Nicolas
Re: [vintagesynthrepair] Juno 106 chips Analogue Renaissance
2013-04-07 by Marcelo Malmierca
Did you try to fix yours ? Many many times if you take of the epoxi cover it rebirth. Just put the chips in a jar with acetone 24 hs and then remove the epoxi
Juno 106 chips Analogue Renaissance
2013-04-07 by Nicolas
Hi, I used to order some 80017A chips for the Juno-106 from Analogue Renaissance because they are great and reliable. But recently it seems very difficult to
[vintagesynthrepair] Re: ARP whiteface Odyssey filter module
2013-04-05 by Malte Rogacki
... There probably wil be very little keyboard cv directly at the input of the LM301 since it passes through a 100k resistor before. If you look at the
Re: ARP whiteface Odyssey filter module
2013-04-05 by alesisfusion8hd
Hi Malte thanks for your advice. Output of the slider seems ok (1.36 V w/ KBD CV way up, LFO & EG down), but input of LM301 still 0. I removed the LM301 from
Re: [vintagesynthrepair] ARP whiteface Odyssey filter module
2013-04-04 by Malte Rogacki
... The LM301 is wired as an inverting amp which means the input will be inverted; positive voltages on the input will become negative voltages at the output.
Re: [vintagesynthrepair] Arp ProSoloist problem.
2013-04-03 by Jim Blair
Thanks. I ll fire up the other ProSo tonight, and compare.