Search found 131 matches

by ApolloBoy
Thu May 12, 2016 12:13 am
Forum: General Synthesizers
Topic: Crumar DS-2 VCO vs DCO
Replies: 13
Views: 8595

Re: Crumar DS-2 VCO vs DCO

There are a few other synths that use stepped waveforms, like the SH-1000 (which uses a VCO) and the Poly-800 to name a few.
by ApolloBoy
Wed May 11, 2016 4:13 pm
Forum: General Synthesizers
Topic: Recapping a Jupiter-4
Replies: 47
Views: 11230

Re: Recapping a Jupiter-4

The best is an actual desoldering gun or station, which use a vacuum pump to suck the solder. Just stick it over the joint you want to desolder, wiggle it around a bit so all the solder gets molten, and pull the trigger. It actually makes desoldering kinda fun and has a much lower risk of damaging a...
by ApolloBoy
Wed May 11, 2016 8:22 am
Forum: General Synthesizers
Topic: Recapping a Jupiter-4
Replies: 47
Views: 11230

Re: Recapping a Jupiter-4

It's a bit surprising. Did you recap the four voice boards ? What caps did you use ? I recapped everything, including all four voice cards. I mainly used audio-grade Nichicons but I also used a mix of general purpose Nichicon and Panasonic caps (most of the original caps were actually Matsushita/Pa...
by ApolloBoy
Sun May 08, 2016 5:12 pm
Forum: General Synthesizers
Topic: Recapping a Jupiter-4
Replies: 47
Views: 11230

Re: Recapping a Jupiter-4

system100m wrote:I wonder how better your JP4 sounds now ? Do you feel a big improvement when recapped ?
It didn't change the sound at all, and that wasn't really the point of doing this anyway. However, the tuning stability is significantly better which is part of the reason why I did this project.
by ApolloBoy
Sat Apr 30, 2016 11:27 pm
Forum: HELP!
Topic: Yamaha CS-50 not playing notes
Replies: 18
Views: 11675

Re: Yamaha CS-50 not playing notes

Etche wrote:I OWN A YAMAHA SS30 WHICH CONTAINS A CHIP MODEL YM25400 THAT NEEDS TO BE REPLACE. IM HAVING TROUBLE FINDING THE PART. ANYONE CAN HELP ME???
It would help a lot if you created a separate thread and didn't use caps lock.
by ApolloBoy
Tue Apr 19, 2016 4:30 am
Forum: HELP!
Topic: Bizarre Jupiter-4 problems
Replies: 1
Views: 784

Re: Bizarre Jupiter-4 problems

Got this figured out a few days ago. I wound up almost totally disassembling the synth and resoldered every single connection that was related to my problem, and now it sounds great again. I also took the time to replace some more caps, including a couple of little ones on the PSU that I missed a fe...
by ApolloBoy
Tue Apr 19, 2016 4:24 am
Forum: HELP!
Topic: Jupiter-4 restoration... thoughts?
Replies: 16
Views: 4744

Re: Jupiter-4 restoration... thoughts?

I'm thinking of recapping my JP-4... I've already done the power supply, and solved the dodgy 'track crack' issue in the control boards. I also desoldered every fader, cleaned it out, re-tensioned it, rebuilt it and measured it again, before resoldering. Took ages, but thoroughly worth it. What bra...
by ApolloBoy
Fri Apr 01, 2016 4:21 am
Forum: HELP!
Topic: Bizarre Jupiter-4 problems
Replies: 1
Views: 784

Bizarre Jupiter-4 problems

Love the sound of this synth but it's seriously been wearing down my patience as of late. Anyway, I was getting ready to record some stuff with my Jupiter-4 until it started acting up in ways that I had never encountered before. The envelope generators seem to be completely messed up, as patches tha...
by ApolloBoy
Sat Mar 19, 2016 8:26 am
Forum: HELP!
Topic: Jupiter-4 restoration... thoughts?
Replies: 16
Views: 4744

Re: Jupiter-4 restoration... thoughts?

I had time to clean the keyboard while I had my Jupiter-4 apart tonight, and it's actually ridiculously easy to clean. Once you have the keyboard out of the synth, flip it over and you have access to the busbar and metal prongs. In my case the keyboard had a ton of dust, so I just cleaned it out wit...
by ApolloBoy
Sat Mar 19, 2016 8:22 am
Forum: General Synthesizers
Topic: Recapping a Jupiter-4
Replies: 47
Views: 11230

Re: Recapping a Jupiter-4

I managed to find some time to work on my JP-4 again tonight and I discovered that the key assign board on mine has a couple of extra electrolytic caps on the underside of the board. I don't remember what value they were, but I'll add them to the BOM once I look at it again. EDIT: They're 10 uF caps...
by ApolloBoy
Tue Mar 15, 2016 7:36 am
Forum: HELP!
Topic: cleaning vintage knobs question (answered)
Replies: 5
Views: 1218

Re: cleaning vintage knobs question

part12studios wrote:Ok, when you mean overdo it, like multiple "sessions" of cleaning? or just not to use long bursts effectively "soaking" the pots?
I was mainly talking about the latter, but the former would apply as well.
by ApolloBoy
Tue Mar 15, 2016 3:48 am
Forum: HELP!
Topic: cleaning vintage knobs question (answered)
Replies: 5
Views: 1218

Re: cleaning vintage knobs question

Just make sure not to overdo it and only use a little spritz.
by ApolloBoy
Sun Mar 06, 2016 9:01 pm
Forum: General Synthesizers
Topic: 3rd time lucky. What have you bought several times?
Replies: 4
Views: 953

Re: 3rd time lucky. What have you bought several times?

I've had two JX-10s so far. The first one I had was actually the first analog synth I ever owned, but then after about five years I got tired of it and traded it for a Korg 01/WFD, which I promptly sold and then used the money to get a Juno-106. I'm on my second one now and once again I'm finding th...
by ApolloBoy
Sun Mar 06, 2016 7:10 pm
Forum: HELP!
Topic: Jupiter-4 restoration... thoughts?
Replies: 16
Views: 4744

Re: Jupiter-4 restoration... thoughts?

I had a beautiful JP-4 which had the Midi I/O mod fitted to it. I thoroughly recommend getting that upgrade, as it replaces the original cpu and adds a ton of functions. I've definitely been looking into that, especially now that I have an SQ-1 and the Jupiter-4 doesn't have any kind of external co...
by ApolloBoy
Sun Mar 06, 2016 7:05 pm
Forum: General Synthesizers
Topic: Longest production runs for synths
Replies: 18
Views: 4641

Re: Longest production runs for synths

Re-issues count, as long as the newer versions resemble the originals. The Minimoog Voyager started in 2002. The original Minimoog being made for 12 years. I'd think the Voyager would be a different synth considering it has a lot of extra functionality and a slightly different sound compared to the...