Search found 146 matches

by rschnier
Mon Feb 23, 2015 7:30 pm
Forum: Synth Shootouts
Topic: The thread of many (analog) polys
Replies: 47
Views: 24584

Re: The thread of many (analog) polys

The Matrix-6 is nice (I own one as well as Matrix-1000) but be aware that has a different voice architecture than the Xpander and M-12 -- DCOs instead of analog VCOs. The DCOs on the M-6 have independent clocks but the ones on the M-1000 are all driven by the same clock, which unfortunately reduces ...
by rschnier
Mon Feb 23, 2015 7:04 pm
Forum: General Synthesizers
Topic: Synth Defects - Ticking Time Bombs
Replies: 71
Views: 104577

Re: Synth Defects - Ticking Time Bombs

ARP Omni / Omni-2. Power supply throws voltage spikes when powered up, causing damage over time to the many tantalum (decoupling) capacitors connected across the power supply rails throughout the synth, eventually causing one or more to dead-short. Since the power supply rails are not fused, when th...
by rschnier
Sun Feb 22, 2015 8:59 pm
Forum: Synth Shootouts
Topic: The thread of many (analog) polys
Replies: 47
Views: 24584

Re: The thread of many (analog) polys

The Oberheim Xpander (6-voice) and Matrix-12 (12-voice, basically two Xpanders in a keyboard unit) are worth considering too. Two analog VCOs, analog multi-mode filter (low-pass 6 & 12 dB/O, high-pass, band-pass, more) and multiple VCAs per voice, multiple LFOs and basically a general-purpose comput...
by rschnier
Sun Feb 22, 2015 8:45 pm
Forum: General Synthesizers
Topic: Korg PE-1000 - One Weird Beauty!
Replies: 23
Views: 3134

Re: Korg PE-1000 - One Weird Beauty!

The PE-1000 shares something in common with the Polymoog in that although both instruments do indeed have overall filters at the end of their audio paths they also have a simple dedicated voltage controlled low pass filter (without resonance) with an independent envelope generator on every key. In ...
by rschnier
Sun Feb 22, 2015 12:25 am
Forum: General Synthesizers
Topic: Korg PE-1000 - One Weird Beauty!
Replies: 23
Views: 3134

Re: Korg PE-1000 - One Weird Beauty!

They are weird, great machines, but my biggest complaint (and the reason Jon S. now owns his :lol: ) is the lack of envelope modulation on the filter. I know you can sweep with the foot pedal, but you would think that true env. or LFO modulation would be de rigueur on a synth that contains such a f...
by rschnier
Fri Feb 13, 2015 7:18 pm
Forum: HELP!
Topic: Step Down Voltage Converter
Replies: 7
Views: 833

Re: Step Down Voltage Converter

110V (or is it centered at 117? yet worse) It's actually centered at 120, and many places I've lived and played at in the US, it was near 125. I would be extremely wary of operating anything designed for 100V on typical US voltages for any length of time, but as the saying goes "your mileage may va...
by rschnier
Tue Feb 10, 2015 6:39 am
Forum: HELP!
Topic: Step Down Voltage Converter
Replies: 7
Views: 833

Re: Step Down Voltage Converter

For what it's worth...Based on a quick Google image search, power outlets and plugs in Japan are physically identical to those in the US.
by rschnier
Mon Feb 09, 2015 8:31 pm
Forum: General Synthesizers
Topic: UPDATE: eBay Buyer from h**l!
Replies: 84
Views: 6846

Re: UPDATE: eBay Buyer from h**l!

While serving him with a small-claims court action would involve some time and expense (perhaps more than the unit is worth), consider the potential benefit of assuaging the torture your soul has endured. I mentioned to my spouse the other day, lately I feel like either I'm getting old or the world ...
by rschnier
Mon Feb 02, 2015 3:21 am
Forum: General Synthesizers
Topic: UPDATE: eBay Buyer from h**l!
Replies: 84
Views: 6846

Re: eBay Buyer from h**l!

commodorejohn wrote:"The F**k Police" would be a good band name.
Especially if you left the asterisks in.
by rschnier
Mon Feb 02, 2015 3:00 am
Forum: HELP!
Topic: S5000: Overheating Power Transformer?
Replies: 4
Views: 1047

Re: S5000: Overheating Power Transformer?

Some thoughts: The glowing red/orange under the transformer is of great concern, obviously...high current flowing through a small connection or wires. Question is what's causing the high current. I'd suspect that the windings of the transformer have partially shorted -- transformers are wound with v...
by rschnier
Sun Feb 01, 2015 11:55 pm
Forum: HELP!
Topic: Replacing Power Supplies
Replies: 12
Views: 2807

Re: Replacing Power Supplies

A related thought: I've always wondered why ARP didn't just use 7815/7915 +-15 volt, 1A regulators in the Omni-2's PS. I've built lots of +-15 volt supplies to go in various analog gear I've constructed over the years and those parts are very reliable. The only reason I can think of is that those re...
by rschnier
Sun Feb 01, 2015 11:37 pm
Forum: General Synthesizers
Topic: Edgar Froese 1944 - 2015
Replies: 26
Views: 2936

Re: Edgar Froese 1944 - 2015

Very sad to hear this. I first encountered his and TD's music back in 1975 and over the years came to acquire essentially his entire catalog of work; was hugely influenced by it. Sincere condolences to Jerome and the rest of his family.
by rschnier
Mon Jan 05, 2015 6:27 pm
Forum: HELP!
Topic: Power supply conversion from 100V to 230V.
Replies: 13
Views: 1912

Re: Power supply conversion from 100V to 230V.

^ ^ Thanks, that's good info. I always find it very interesting when looking at differences in power supply requirements among different countries. Cheers!
by rschnier
Thu Jan 01, 2015 9:06 pm
Forum: HELP!
Topic: Power supply conversion from 100V to 230V.
Replies: 13
Views: 1912

Re: Power supply conversion from 100V to 230V.

Actually, it's the same on 240V circuits in the USA, which is why the circuit breaker for the house circuits powering the clothes dryer, range, etc. is a double-pole rather than a single-pole. I think you're getting the terminology mixed up, neutral isn't ever tied to ground, the earth pin is. As I...
by rschnier
Mon Dec 22, 2014 1:43 am
Forum: HELP!
Topic: Power supply conversion from 100V to 230V.
Replies: 13
Views: 1912

Re: Power supply conversion from 100V to 230V.

My theory would be that it would've been because of tighter regulations in the EU - switching the active *and* the neutral is safer than simply switching the active. Hence the need for a DPST. Basically correct, however for what it's worth -- in Europe, both lines are active and there is no "neutra...