Search found 21 matches

by dstrength
Mon Jun 13, 2016 7:41 pm
Forum: Gear Services & Other Goods
Topic: Linndrum recap job - problems with two values
Replies: 6
Views: 3739

Re: Linndrum recap job - problems with two values

Some other things you might want that I usually have to order when restoring a LinnDrum: Slider Caps - Mountain Switch 10TB002 (black) http://www.mouser.com/ProductDetail/Mountain-Switch/10TB002/?qs=%2fha2pyFaduhIVyS9IdIeCeFCY6%2f%2fXyfFrsfDujXLji4%3d Battery: Power-Sonic 3.6v NiCd - PCBM-3.6 http:/...
by dstrength
Thu Apr 14, 2016 8:12 pm
Forum: HELP!
Topic: Korg MS-20 Serial numbers which filter version do I have?
Replies: 7
Views: 5625

Re: Korg MS-20 Serial numbers which filter version do I have

You can also tell (for the most part...I few rare exceptions have been found) by the extra screw on the front panel near the VCA drawing. Extra screw=Lm13600 filter. No screw=35 filter.
by dstrength
Thu Apr 14, 2016 1:22 pm
Forum: HELP!
Topic: Arp Odyssey replacement slider help...
Replies: 3
Views: 1586

Re: Arp Odyssey replacement slider help...

I also make some adapters for using newer Bourns PTL sliders (the LED ones) inside some of the old ARPs. That is the ones that use the CTS 5700 series. A full list is on the site.

http://www.gmusynth.com/collections/ret ... tl-adapter
by dstrength
Thu Feb 25, 2016 7:39 pm
Forum: HELP!
Topic: How much would a arp omni 1 fetch in uk
Replies: 2
Views: 2193

Re: How much would a arp omni 1 fetch in uk

I restore tons of Omni's and Omni 2's. I usually get $800-$1000 for a fully restored Omni. The Omni 2's indeed sell for more: $1100-$1300.

Why? It makes no sense what so ever. The Omni 1 sounds better in my opinion. And the bass goes through the synth filter...which it doesn't on the Omni 2.
by dstrength
Tue Feb 23, 2016 7:37 pm
Forum: HELP!
Topic: Juno 6 Repair or ??
Replies: 4
Views: 1170

Re: Juno 6 Repair or ??

Ko Okatake is a well known analog synth tech in Japan. Also, you can ask over on the Facebook group: https://www.facebook.com/groups/vintagesynthrepair/ There's several guys from Japan on there.
by dstrength
Tue Jan 26, 2016 5:42 am
Forum: HELP!
Topic: Sliders maintenance: how to replace protective membrane?
Replies: 6
Views: 552

Re: Sliders maintenance: how to replace protective membrane?

Replace the foam for sure. In the Rogue era Moogs it's a nightmare...as it turns to tar. My shop floor is stained with spots of Moog foam tar. Some folks use neoprene, and others EVA foam, often available in crafts stores. Stick the material sheet under the panel and mark the slots with a pencil. Th...
by dstrength
Mon Jan 18, 2016 3:04 pm
Forum: HELP!
Topic: Roland Juno-106 Voice Selection Malfunction
Replies: 2
Views: 404

Re: Roland Juno-106 Voice Selection Malfunction

Pretty common issue. The tact switches tend to fail over time. Part of the typical restore practice is to replace all of them. Suitable replacement parts are: Multicomp MC32862, or ALPS SKHHPKA010. I use the ALPS ones.
by dstrength
Fri Jan 08, 2016 5:04 pm
Forum: HELP!
Topic: Problem with my juno-106
Replies: 1
Views: 363

Re: Problem with my juno-106

You have one voice chip out. Notice that it happens every 6th note is dropped. As you trigger a single key, the CPU rotates the chip being used. One of the 6 is failed / failing. Lots of threads on chip replacement with new clones like Analog Renaissance, or by stripping the epoxy covering with acet...
by dstrength
Mon Jan 04, 2016 3:36 pm
Forum: HELP!
Topic: ARP Omni 2 sustain (release) problem on all sections
Replies: 12
Views: 5139

Re: ARP Omni 2 sustain (release) problem on all sections

In your photos, you still show some tants on the synth board. But, you need to measure the AR functions and double check some things on the String board: Double check the release slider works, and check caps C17 and C18 (tants). Double check the string board path to ground. One of these paths is thr...
by dstrength
Tue Jun 17, 2014 2:19 pm
Forum: HELP!
Topic: Taurus II Pedal Controller Problem/Question
Replies: 2
Views: 296

Re: Taurus II Pedal Controller Problem/Question

Likely a mechanical problem with the pedal contacts. Open it up, and you'll notice there's two circuits going on: one for the trigger, one for the CV. Your triggers are working, but your CV is not. It works off low note priority...so you could have a low contact stuck. The contacts are springs that ...
by dstrength
Thu Apr 24, 2014 12:15 pm
Forum: HELP!
Topic: Question about recapping vintage synths and Low ESR caps
Replies: 4
Views: 1332

Re: Question about recapping vintage synths and Low ESR caps

many thanks for the heads up ;) Very interesting group , I wish I could preview the topics there but it is not possible since I dont have a FB account. It's worth getting an account. It's a great cross-functional group of people: synth enthusiasts, prof keyboard techs, seasoned veterans, and just v...
by dstrength
Wed Apr 23, 2014 8:47 pm
Forum: HELP!
Topic: Question about recapping vintage synths and Low ESR caps
Replies: 4
Views: 1332

Re: Question about recapping vintage synths and Low ESR caps

Hey man, you might try heading over to the vintage synth repair group on facebook.

I asked some general power supply design questions and got a lot of good info...some on Low ESR caps. Awesome group of guys as well.
by dstrength
Tue Apr 15, 2014 2:54 pm
Forum: HELP!
Topic: Sequential Six-Trak Lock Ups
Replies: 4
Views: 1041

Re: Sequential Six-Trak Lock Ups

rhino,

Did you happen replace the cpu with the original Z8400APS? Or did you use a more readily available modern version. I'm not sure, but it looks like I could use Z84C006. Not real familiar with this stuff. Any ideas?
by dstrength
Mon Apr 14, 2014 11:23 pm
Forum: HELP!
Topic: Korg MS20 calibration
Replies: 7
Views: 5961

Re: Korg MS20 calibration

Oh man, the pitch to voltage section is over my head. And the series of six invertors? WTF! On the ESP board, VR1 is another of those offsets on a voltage follower op amp, TL081. My guess is VR1 is for trimming the zero output state. VR2 I have no idea. On the filter, my MS-20 has the Korg35s, so no...