Search found 11 matches

by Envergure
Fri May 12, 2017 11:57 pm
Forum: HELP!
Topic: JX-3P power supply repair
Replies: 4
Views: 2212

Re: JX-3P power supply repair

The old caps are fine. They're just old.

Thanks for the replies, guys. I will just repair the existing supply. I might replace the good diode bridge too, just in case it is also deteriorating.
by Envergure
Fri May 12, 2017 3:41 am
Forum: HELP!
Topic: Converting something from 220v to 110v...
Replies: 3
Views: 1610

Re: Converting something from 220v to 110v...

For something that old, what is involved (most likely) is changing the number of turns of wire on a mains-frequency transformer. You could double the number of secondary turns if there is room for all that wire, or you could halve the number of primary turns. In either case, the current through the ...
by Envergure
Fri May 12, 2017 2:58 am
Forum: HELP!
Topic: JX-3P power supply repair
Replies: 4
Views: 2212

JX-3P power supply repair

Hi everyone, I am working on repairing my Dad's Roland JX-3P. I have determined that the two fuses for the +15V and -15V rails are blown, and two opposite diodes in the bridge rectifier have failed short. I cannot find any other damage that could have precipitated this. The best theory I can come up...
by Envergure
Mon Jan 11, 2010 12:19 am
Forum: General Synthesizers
Topic: Can anyone identify this instrument?
Replies: 2
Views: 698

Can anyone identify this instrument?

Anyone recognise the synth in the attached image? It looks like a MIDI version of the right-hand part of a Russian accordion.
by Envergure
Fri May 22, 2009 7:24 pm
Forum: HELP!
Topic: Where can I learn circuit design?
Replies: 9
Views: 2167

Re: Where can I learn circuit design?

I found a great web site here: http://www.allaboutcircuits.com It looks like someone wrote a textbook and couldn't get a publisher, so they uploaded it :) This is all more complicated than I thought. If circuit design were just a bunch of equasions, I'd be off to the races, but there's more too it t...
by Envergure
Sun May 10, 2009 10:25 pm
Forum: HELP!
Topic: Where can I learn circuit design?
Replies: 9
Views: 2167

Where can I learn circuit design?

I would like to learn circuit design so I can repair and modify analog synthesizers, or maybe even design one from scratch. I would love it if someone could recommend a good textbook, website or other resources for me to learn about this. So far, I am 2 weeks from finishing high school with a good k...
by Envergure
Sat May 02, 2009 8:58 pm
Forum: Samplers
Topic: Is there any money in the sample DVD business?
Replies: 22
Views: 3104

Is there any money in the sample DVD business?

Anyone every tried selling sample collections?

I'm thinking of buying an analog modular synth. Is it reasonable to expect it to pay for itself in sample collection sales in my lifetime? (Let's assume I'm a pretty good synth programmer, just to simplify things)
by Envergure
Sat May 02, 2009 8:51 pm
Forum: Synth Shootouts
Topic: Modulars: Dotcom vs. Macbeth M5?
Replies: 7
Views: 1812

Modulars: Dotcom vs. Macbeth M5?

Has anyone used both? Please focus comparison on sound, of all types - pads, keys, leads, basses, techno, FX and acoustic imitations. If I got a modular, I would make extensive use of making SoundFonts of my creations so I could play them polyphonically. I would write a program to make SoundFonts au...
by Envergure
Sat May 02, 2009 8:36 pm
Forum: Synth Shootouts
Topic: juno 60 vs jx3p vs polysix.
Replies: 37
Views: 12701

Re: juno 60 vs jx3p vs polysix.

In the "liquid" department, I'd go for the JX-3P on account of its having 2 oscs per voice. It lends itself better to fluid pads and keys than a single-oscillator synth. The JX-3P and JUNO-60 have the same filter unit FYI (Roland IR3109). Although, one thing to consider is that the JUNO has a 6-voic...
by Envergure
Thu Oct 02, 2008 12:17 am
Forum: General Synthesizers
Topic: Noob question: Oscillator vs. Operator
Replies: 9
Views: 3201

Re: Noob question: Oscillator vs. Operator

first, in FM as used by Yamaha (which is really phase modulation ) it actually isn't using oscillators- scanned wavetables if i remember. second, Yamaha is describing these "oscillators" as used in the context of a greater mathematical function therefore operator is a correct mathematical label. Th...
by Envergure
Wed Oct 01, 2008 12:51 am
Forum: General Synthesizers
Topic: Noob question: Oscillator vs. Operator
Replies: 9
Views: 3201

Noob question: Oscillator vs. Operator

What's the difference between an "oscillator" in subtractive synthesis and an "operator" in FM?