Search found 76 matches

by sneakthief
Mon Mar 09, 2015 8:35 pm
Forum: General Synthesizers
Topic: Obscure vintage Sony synth - info wanted
Replies: 15
Views: 4887

Re: Obscure vintage Sony synth - info wanted

Sony DMS-320?

by sneakthief
Thu Feb 26, 2015 6:56 am
Forum: General Synthesizers
Topic: Synth Defects - Ticking Time Bombs
Replies: 74
Views: 137220

Re: Synth Defects - Ticking Time Bombs

1. SH-101 Speaking of the SH-101, the power button has 2 poles: one to send power to the regulator and one to send the regulated voltage to the DAC. Unfortunately as time goes by, the switch corrodes/oxidizes and the varying resistance makes the DAC freak out and therefore causes the wobbliest pitc...
by sneakthief
Sat Jan 31, 2015 9:48 am
Forum: General Synthesizers
Topic: FutureSonus Parva--an Affordable Analog Poly
Replies: 42
Views: 8601

Re: An affordable Analog Poly

I checked this out: each oscillator board has 3 dco's, 4 eg's, 4 lfos, 1 stereo vca and 2 filters. They look relatively inexpensive to manufacture and are stackable.

Looks legit.
by sneakthief
Thu Jan 29, 2015 6:30 pm
Forum: HELP!
Topic: Strange OB-Xa Problem
Replies: 3
Views: 610

Re: Strange OB-Xa Problem

Does it "remember" patches after it warms up without the keyboard connector plugged in?
by sneakthief
Sun Jan 25, 2015 3:46 pm
Forum: General Synthesizers
Topic: Why don't new synths have 'that vintage sound?'
Replies: 50
Views: 10568

Re: Why don't new synths have 'that vintage sound?'

Oh yeah, just wanted to mention some modern PSU-related snafus off the top of my head: - Fizmo: bad regulator which is prone to dying and taking out the whole board - Korg ESX/EMX: soldered in microfuse that's rated too low for the inrush current and often dies - Microkorg: no proper over-voltage pr...
by sneakthief
Sun Jan 25, 2015 3:46 pm
Forum: HELP!
Topic: Replacing Power Supplies
Replies: 12
Views: 3478

Re: Replacing Power Supplies

I put this in an Arp Omni and it works great:

http://www.mouser.com/ProductDetail/Int ... G4Jg%3D%3D

Listen to HideawayStudio - he knows the score.
by sneakthief
Sun Jan 25, 2015 12:36 pm
Forum: General Synthesizers
Topic: Why don't new synths have 'that vintage sound?'
Replies: 50
Views: 10568

Re: Why don't new synths have 'that vintage sound?'

PS. It's true - building good PSUs has been possible for decades! All I'm saying is that in practice, things got more... fuzzy ;)

My take is that compromises in PSU design account for maybe 10% of the so-called vintage sound.
by sneakthief
Sun Jan 25, 2015 12:29 pm
Forum: General Synthesizers
Topic: Why don't new synths have 'that vintage sound?'
Replies: 50
Views: 10568

Re: Why don't new synths have 'that vintage sound?'

In comparison a PSU is pretty straightforward it either works or it doesn't. Having built dozens of synth PSUs using different topologies, I have to disagree. First of all, every PSU has inherent ripple, which quite as I mentioned often affects tuning stability and transient/frequency response. Fur...
by sneakthief
Sat Jan 24, 2015 11:03 pm
Forum: General Synthesizers
Topic: Why don't new synths have 'that vintage sound?'
Replies: 50
Views: 10568

Re: Why don't new synths have 'that vintage sound?'

I have tons of respect for HideawayStudio. No question. For the sake of covering all angles in this thread, it seemed important however to bring up PSU design. There's a lot of things that can happens as a PSU ages. As I mentioned, PSU voltage ripple & sag play a big role in sound and can affect fre...
by sneakthief
Fri Jan 23, 2015 12:47 pm
Forum: General Synthesizers
Topic: Why don't new synths have 'that vintage sound?'
Replies: 50
Views: 10568

Re: Why don't new synths have 'that vintage sound?'

HideawayStudio: you forgot to mention the importance of the power supply design, especially when it comes to ripple and sag. Recapping a psu may only affect a portion of the sound that specific psu's impart.
by sneakthief
Thu Jan 08, 2015 2:19 pm
Forum: General Synthesizers
Topic: Favorite use of the Synclavier?
Replies: 53
Views: 11799

Re: Favorite use of the Synclavier?

What's the big polysynth at 2:25 in Lipson's studio?
by sneakthief
Sat Dec 13, 2014 6:50 pm
Forum: HELP!
Topic: Casio FZ-10M fails to start/freezes—only screen & LEDs light
Replies: 25
Views: 4352

Re: Casio FZ-10M fails to start/freezes—only screen & LEDs l

NB re. "Nah, this cap is 470 uF" - sometimes people write microfarads as mF instead of uF or µF
by sneakthief
Fri Nov 21, 2014 9:40 am
Forum: HELP!
Topic: OB-Xa Problem
Replies: 15
Views: 3549

Re: OB-Xa Problem

I didn't quite understand the initial question either - and I repair synths professionally :P

But your obnoxious response pretty much guarantees that nobody here will care to help you.