Search found 260 matches

by adhmzaiusz
Sun May 05, 2019 4:52 pm
Forum: General Synthesizers
Topic: Just scored big on a Memorymoog!!
Replies: 1
Views: 979

Re: Just scored big on a Memorymoog!!

Congrats. Sounds like you've definitely got a power supply issue, and thankfully the PS is a fairly easy board to work on. In a few MM's I've worked on, it's not so much the connectors that are a problem, it's the bourns trimmers on the voice boards. They usually get a bad spot on them where it's ne...
by adhmzaiusz
Thu Aug 17, 2017 8:52 pm
Forum: General Synthesizers
Topic: Crumar Performer- ripe for all kinds of mods
Replies: 10
Views: 7527

Re: Crumar Performer- ripe for all kinds of mods

Cool. I remember sound doctorin made a video about this but a schematic would be easier to follow if you can post it!
by adhmzaiusz
Fri Feb 24, 2017 6:48 pm
Forum: General Synthesizers
Topic: Andromeda A6 or Jupiter 8?
Replies: 17
Views: 2514

Re: Andromeda A6 or Jupiter 8?

There are practically zero 16 voice analogue synths out there. Everyone else stopped at eight. Practically zero indeed, I can only think of the A6 and the Chroma- but the A6 wins in having 32 oscillators. ----- If I were to offer my opinion between the two, I'd have to agree that in terms of base s...
by adhmzaiusz
Fri May 13, 2016 4:13 pm
Forum: General Synthesizers
Topic: Crumar DS-2 VCO vs DCO
Replies: 13
Views: 6598

Re: Crumar DS-2 VCO vs DCO

Bitexion wrote:My Andromeda A6 has 32 VCOs stroking me, so I don't need a real womans
Like a khan of khans with a royal VCO harem ;)
by adhmzaiusz
Wed May 11, 2016 9:46 pm
Forum: HELP!
Topic: Crumar DS2 problem (clock noise?)
Replies: 9
Views: 2125

Re: Crumar DS2 problem (clock noise?)

psygoat wrote:That's a result.

Must be a fairly common problem with these - even though it's a really unusual fault.

They're great synths but the build quality is awful.
Not only is it awful (don't get me started on refurbing the keybed) but extremely odd! So many weirdly arranged boards.
by adhmzaiusz
Wed May 11, 2016 8:59 pm
Forum: General Synthesizers
Topic: Crumar DS-2 VCO vs DCO
Replies: 13
Views: 6598

Re: Crumar DS-2 VCO vs DCO

DCO v VCO is a false dichotomy. There are a lot of ways to make an oscillator. Sounds like the Crumar generates the waveform "analogue" but the pitch is digitally controlled. The waveforms on the DS2 actually look very digital. Check out the sound doctorin youtube videos, he talks about about the s...
by adhmzaiusz
Sat Apr 30, 2016 11:42 pm
Forum: HELP!
Topic: Crumar DS2 problem (clock noise?)
Replies: 9
Views: 2125

Re: Crumar DS2 problem (clock noise?)

OK! So for the record the CMOS chips to blame are the two 4070 quad exclusive OR gates on board P436. Makes sense, the gates aren't closing all the way when they go bad. I totally missed these the first time around but seems a huge improvement. The clock sound is still there very faintly, have to cr...
by adhmzaiusz
Mon Apr 25, 2016 9:06 pm
Forum: HELP!
Topic: Crumar DS2 problem (clock noise?)
Replies: 9
Views: 2125

Re: Crumar DS2 problem (clock noise?)

Hi Psygoat, thanks for your reply. I tried replacing the CMOS chips-- i think there were 2 4069's, and 2 401(X) multiplexers (replaced those ones except for the number counter, can't remember off the top of my head the part no., but it was somewhat uncommon to synths) with no luck. Maybe I'll also t...
by adhmzaiusz
Thu Apr 21, 2016 1:19 am
Forum: HELP!
Topic: Crumar DS2 problem (clock noise?)
Replies: 9
Views: 2125

Re: Crumar DS2 problem (clock noise?)

If anyone has the same problem, try replacing the ic's on the waveshaper pcb. They're all standard cmos logic ic's, easily available and they are socketed, so it's no problem to change them. Sorry to resurrect an old thread, but I just picked up a DS2 with this same high pitch sound exactly as you ...
by adhmzaiusz
Thu Jan 28, 2016 5:46 pm
Forum: General Synthesizers
Topic: Should I Repair or Sell: Juno 106
Replies: 16
Views: 5616

Re: Should I Repair or Sell: Juno 106

I guess YMMV then... I can't really say with truth that any of the 106s I restored are long term solutions until time tells, but by removing the resin did make all of the problems go away. I guess the same can be said about the AR chips too, since everything fails one day ;) Either way, probably the...
by adhmzaiusz
Wed Jan 27, 2016 6:20 am
Forum: General Synthesizers
Topic: Should I Repair or Sell: Juno 106
Replies: 16
Views: 5616

Re: Should I Repair or Sell: Juno 106

its best to just put the new clones in...they sound great. i fix dozens of 106's and the acetone trick really is not a long term solution... I agree the clones sound good, but no less or better than identical. But in my experience they were much more sensitive to ambient temperature, Making calibra...
by adhmzaiusz
Tue Jan 26, 2016 3:38 pm
Forum: General Synthesizers
Topic: Random Popping/ crackling sounds when not playing synth
Replies: 3
Views: 899

Re: Random Popping/ crackling sounds when not playing synth

Sounds to me like a cold solder. You'll have to examine the boards to find it.
by adhmzaiusz
Mon Jan 25, 2016 7:33 pm
Forum: General Synthesizers
Topic: Should I Repair or Sell: Juno 106
Replies: 16
Views: 5616

Re: Should I Repair or Sell: Juno 106

Not sure what synth spa would have done to your voice chips, but if they are still sealed in the resin coating it is a very easy repair if you have desoldering & soldering skills. A simple soldering iron and solder-pump should be enough, and you'll need a small amount of acetone from your local hard...
by adhmzaiusz
Wed Dec 02, 2015 8:18 pm
Forum: General Synthesizers
Topic: Articulator on Moog Opus 3 dead
Replies: 1
Views: 393

Re: Articulator on Moog Opus 3 dead

I had a client with this same problem once, this particular problem turned out to be a broken solder on one of the connectors
by adhmzaiusz
Mon Apr 27, 2015 2:20 am
Forum: General Synthesizers
Topic: CS-50 60 owners
Replies: 73
Views: 9418

Re: CS-50 60 owners

and cycles through the voices. All analogue polysynths do that though! And DCO polys too. It's not unique the the Yamaha polys. There are some that don't cycle. The ones I've found that don't -- the Jupiter 8 (unless you boot it holding buttons 1&3), JX3p, the SCI Prophet 10, the Split 8. But safe ...