Re: [vintagesynthrepair] Re: Help with Crumar Spirit
2002-07-05 by mtcasino@comcast.net
Bad cap or solder joint some where in that circut . Mike ... From: Matt Nolan To: vintagesynthrepair@yahoogroups.com ; crumar@yahoogroups.com Sent: Friday,
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Re: Help with Crumar Spirit
2002-07-05 by Matt Nolan
Here s a bit of an update: I ve traced the pitch CV path back through the DAC, the adder for the arpeggiator and the keyboard scanning ICs. I found that the
six trak battery replacement
2002-07-04 by ed hallborg
Thanks again BaM, I didn t see this page before, let alone the patch librarian- downloading it now. EdMessage: 6 Date: Tue, 2 Jul 2002 06:07:19 -0700 (PDT)
ARP 2600 OpAmp Mods
2002-07-04 by kanaguvnor
Hi! I was wondering if anyone out there has done the ARP2600 opamp mod. Is it just a case of removing all the LM301A s (and the SL19986 s), replacing them with
Korg Lambda (ES-50)
2002-07-03 by Dharma Bummer
Does anybody have schematics for the Korg Lambda a.k.a. ES-50 polyphonic ensemble, or any experience with repairing em? I got ahold of one on which some
Re: [vintagesynthrepair] six tk. battery replacement
2002-07-03 by Dharma Bummer
... Oh, sorry - go to this page; it s an invaluable resource for any Six-Trak (and several other SCI synths) users and includes a link to a librarian program.
six tk. battery replacement
2002-07-03 by ed hallborg
Thanks BaM, sounds like a fine idea I know this is off topic, but can you tell me what software I would be using to dump all the midi data (my patches) into
Help with Crumar Spirit
2002-07-03 by Matt Nolan
I don t believe it! I left my Crumar Spirit standing on it s side near the window for a day or two - the afternoon sun beaming down upon it s black underbelly.
Re: [vintagesynthrepair] sci sixtk. battery replacement
2002-07-02 by Dharma Bummer
... I don t know, but why not just do it the easy way and transfer all your patches to your computer via MIDI first just to be on the safe side? BaM ===== This
sci sixtk. battery replacement
2002-07-02 by ed hallborg
Hello! has anyone changed the battery on a sci six trak? Mine seems to be fine but I ve built so many good patches into the synth over the last couple years
Re: [vintagesynthrepair] Re: Help Identifiy IC's
2002-07-02 by mtcasino@comcast.net
Digikey dose not have the RC-4558 op amp. Newark electrinics dose but there is a $ 20.00 minimum. They are about $ .79 each. The Norton op amp should be $ .49
Re: Repairing power supply.
2002-07-01 by jjhannon2001
Ron is right, mechanical noise from the power supply is usually caused by loose transformer mounting screws. Sometimes the laminations on the transformer
Re: Help Identifiy IC's
2002-07-01 by jjhannon2001
... Ethan, both IC s are linear types. One is the LM3900N (national semiconductor) and the other is a LM1458 (also national part) you can also use a RC4558
Re: Help Identifiy IC's
2002-07-01 by jjhannon2001
... Ethan, both IC s are linear types. One is the LM3900N (national semiconductor) and the other is a LM1458 (also national part) you can also use a RC4558
RE: [vintagesynthrepair] Repairing power supply.
2002-06-29 by Ron Lake
Hi Ethan, You will probably find that the noise (if you mean actual sound rather than instability of supply), is caused by the transformer. Check the
Re:Repairing power supply.
2002-06-28 by ethanzer0
... electrolytic ... Hello Peter, Can this account for the hum coming from the supply? I mean the supply itself actually hums and crackles. I don t mean not
Re:Repairing power supply.
2002-06-28 by Peter M Blackett
HI, in a lot of older power supply units its likely that the electrolytic smoothing caps may need changing . this applies to both the linear and the switched
Re: [vintagesynthrepair] Repairing power supply.
2002-06-27 by vintagevibe@aol.com
Ethan, Feel free to call Jeff Blenkisopp at Expert Audio Repairs in NYC... 212 868 4357... He is one of the best synth repair guys in the country. He also is
Repairing power supply.
2002-06-27 by ethanzer0
I have an old +/-15v .5A power supply that is very noisy and I suspect it is in need of servicing; potentially a rebuild. Does and body have experience doing
kurzweil sp88
2002-06-20 by av0n2000
hey im selling a kurzweil sp88 semi weighted keyboard, it has some scratches on it but it works perfect and the scratches arnt that bad, i will throw in the
Welson Globetrotter organ
2002-06-18 by leginnotrub
Anyone know where I can get a circuit diagram for this old Italian organ ?
Re: Possessed Korg PS3200 - Need help
2002-06-18 by echo7even
HI thanks for the tip.. this is the second reply I have received mentioning the caps.. I will go and check those the next time the korg is in front of me
Re: Possessed Korg PS3200 - Need help
2002-06-18 by jdb000001
I ve run across a problem in the past, with a piece of equipment that used a single DAC fed thru a demultiplexer. Hopefully it is similar to your synth - I
Possessed Korg PS3200 - Need help
2002-06-16 by rick smith
Hi guys okay after three long years, I finally have had a chance to work on my 3200... it is working 100% except for one annoying problem. I am hoping that
Re: [vintagesynthrepair] Oscilloscopes?
2002-06-12 by mtcasino@comcast.net
Ethan: Try to find a Tektronics with a money back garantee and two probes. A larger screan is prefered, and portability. You should be able to spend a little
Oscilloscopes?
2002-06-12 by ethanzer0
Hello, Can anyone suggest a particular Oscilloscope they know is good for troubleshooting and calibrating vintage(analog) synth gear? I have read the a 20Mhz
Need Parts For Roland D-70
2002-06-12 by cminerus
In desperate search for parts. I need all 76 new keys, all key pads, a few touch knobs and the black plastic strips that fits at the end of the keys inside. I
Re: axxe cliks
2002-06-08 by analogback
... list. There s a lot of people over there with ARP experience. ... will do thanks.
Korg M1 ROM cards
2002-06-07 by Dharma Bummer
Just wondering if anybody might know if the Korg M1 ROM cards would work in the Korg P3 piano module, cos I noticed that the cards look extremely similar...
OB-8 envelope calibration
2002-06-07 by swwood2001
Well, my OB-8 is now singing again, with many thanks to Dean Batute in Toronto for the repair, and David Wiseman in the UK for the chips we couldn t find here.
Re: [vintagesynthrepair] axxe cliks
2002-06-07 by Robert Williams
You might want to try asking this one over on the Odyssey email list. There s a lot of people over there with ARP experience. Rob
AW: [vintagesynthrepair] What is most likely to blow?
2002-06-07 by Hintraeger Reinhard
Hello Ethan! This is hard to say, because it depends on the quality of the circuit design and the components. But my experience with old analog synths is, that
axxe cliks
2002-06-07 by analogback
hi, just bought an arp axxe and ive noticed it makes a click when it recieves a gate signal, i rang a local tech and he said this is common and cant be fixed.
What is most likely to blow?
2002-06-06 by ethanzer0
In an 25 year old VCF circuit that operates on 15V, what is most likely to fail? A cap, transistor, diode, or OpAmp? Thanks, Ethan
Re: Help Identifiy IC's
2002-06-06 by ethanzer0
... How do you see that in the schematic? I am using the 4072 schematic from Arptech. Thanks, Ethan
Re: [vintagesynthrepair] Help Identifiy IC's
2002-06-06 by david@music-service.co.uk
Looks like standard CMOS logic gates. Get them from Maplin. Regards David Wiseman Electronic Music Services (UK) 44+ 208 478 8242 www.music-service.co.uk
AW: [vintagesynthrepair] New Arp 2600 questions
2002-06-06 by Hintraeger Reinhard
Hello Ethan! The blue components in your picture are electrolytic capacitors. As they are in audio input lines, I guess they were inserted for decoupling
FA: Arp Axxe
2002-06-05 by Bennett, Paul
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem &item=881166975 based in UK Cheers B
Help Identifiy IC's
2002-06-04 by ethanzer0
Hello, I am trying to identify the two ICs on the ARP 4072 submodule. The schematic shows no ICs nor does the parts list. TIA, Ethan
Syntauri Yahoo group
2002-06-02 by Dharma Bummer
If there s anybody out there interested in the Alpha Syntauri or Passport Soundchaser music systems that were designed for the Apple ][ computers, an
Re: Moog Source help needed!!
2002-06-01 by einarekstrom
Buying a step-down transformer is my last resort, if I can t find any other solution. But still I would prefer getting the power supply permanently converted
Re: [vintagesynthrepair] Re: Moog Source help needed!!
2002-05-31 by Tom Moravansky
... I respectfully disagree. I m in the US and I ve purchased gear from all over the world. Whenever I have the service manual and can easily change the
Re: Moog Source help needed!!
2002-05-31 by elefohuk
Surely it is easier to use a step-down transformer to convert the power supply. Probably safer as well. ... Europe ... supply, ... that ... tried ... included.
Moog Source help needed!!
2002-05-31 by einarekstrom
Hi all, I recently purchased a Moog Source from the U.S., but I live in Europe where the electric current is around 230V/50Hz, as opposed to the current in the
Re: [vintagesynthrepair] Insurance Claims
2002-05-29 by Emiliano .
... I would like to add that I still have my equipment after having cashed the check. You must be careful. Don t be fooled when they say that they want to keep
Re: [vintagesynthrepair] Insurance Claims
2002-05-29 by Emiliano .
Something similar happened to me, in that I had pretty bad damaged equipment. The amount of that was MUCH higher but it was insured. As far as I know, the
Re: [vintagesynthrepair] Insurance Claims
2002-05-29 by Tom Moravansky
... I had a PPG badly damaged by UPS. I got it back and I was going to do the repairs myself. They would like to see a written estimate for parts and labor
Insurance Claims
2002-05-29 by mre_circuits
Hello Friends, I recently sold a modified Casio on ebay. The buyer sent me a check, I cashed it, and shipped it with insurance. Good move. The buyer contacted
Re: [vintagesynthrepair] Vintage For Sale
2002-05-29 by docgofast@aol.com
Very bice indeed, I was actually at your site this wknd drooling! But right now I m trying to find a reputable and affordable repair guru in the Long Beach or
Vintage For Sale
2002-05-28 by arpguy
Hello, IF you are looking for some rare vintage synth gear, Here it is : Synclavier 3200 accesoires Other Synclavier accesoires Roland MKS 80 Accecoires Rare