MATRIXSYNTH: Thursday, February 8, 2007


Thursday, February 08, 2007

We've Got Cats Too

Plan b.

Roland MKS-30 PG-200

Title link takes you to shots pulled via this auction.

Martian Ants


via I.R.Quasar:

"I was quite inspired by the recent post "Looping the Yamaha VSS 200". Attached is an mp3 "Martian Ants" which I recorded using a Yamaha VSS 30 to sample a Speak & Spell. All the processing was done in the Vss 30 and recorded straight out. It's a fun little ditty inspired by 1950's SciFi."

Click here for the mp3

Cats at rest

flickr by sarendipatree.

Alesis ION and Ensoniq ESQ1

Title link takes you to more.

MOOG Murf Video on Gearwire Part 2

Title link takes you there. This time with a Nord Lead 3.

studio03850

flickr by amatecha.

modular

flickr by sduck409.

Update via Stephen in the comments:
"Hi - the owner of the synth in that pic here. Just noticed that you had linked to it - haven't checked my flickr page in a while. FWIW, it's a completely homemade synth, from kits mostly, with mostly motm, some blacet, one paia, and a milton sequencer. I've got a lot more pics of that synth - I'll post them on flickr soon, and maybe make a group of them. Very cool page you've got - love it, bookmarked it, will check it often! Thanks!
Steve Drake"

Roland MPU-101

Title link takes you to more info and shots on SoNiCbRaT.

Korg 700 Minikorg Demonstration


YouTube via jabberwalky.

Looping the Yamaha VSS200



via Grondo2001 of Shepitology.

Circuit bent modem ( cosmic blooper #cb_mod ) DEMO 2


"DEMO #2 of Midi controlled circuit bent MODEM w/ light audio effects + drums you're not watching this for the HOT TECHNO RHYTHM (htm)
Website: www.cosmicblooper.com"

DEMO #1

via ferris bueller.

Roland SH-1

Title link takes you to shots pulled via this auction.

Elby Designs

"Elby Designs are pleased to announce the upcoming release of the popular CGS range of designs in EuroRack format. The range will consist of completely re-designed PCB's adapted for the smaller format of the EuroRack system. We will be offering both fully-assembled modules as well as Component and Hardware kits. In addition to the CGS modules we will also be including a number of other designs.

The first 2 CGS modules to be released will be the
CGS735 - Synthacon Filter, and
CGS758 - Utility LFO
in addition
ED101 - 8038-based Linear VCO
ED102 - Octave/Hertz Converter
ED103 - MIDI Trigger
ED104 - Dual Lin/Log VCA - Panner"

Pictured is a mock up. Title link takes you to more. I definitely like the green. Via Ross.

Previous Elby Designs posts

Technology Transplant Roland TR-606 PCB Replacement


Click here for Technology Transplant's Roland TR-606 PCB Replacement page. According to the site:

"On inspection. It is important to note a crucial budgetary decision made during original manufacture of the TB-303 and TR-606 for cost effectiveness.
They are made of wood-pulp material. Not of glass fibers as the new PCB you have received. The wood-pulp material, is a very inexpensive PCB that is not intended to have materials removed afterwards. This type of PCB is actually only intended for prototyping purposes. Not commercial manufacture. An unfortunate problem for these machines that has lead to the demise of thousands."

If you track back to the root of the site, you will see list of vintage synth replacement parts, however no links.

Update via Peter Grenader of Plan b in the comments:
"Actually, the original comment was correct, at least in the Tech Transplant keyboard I installed for a customer (which took me a long time to get working for reasons I will go into next) and from the looks of it, the photo posted here - these boards are made from FR3 laminate, which is paper based. It's much less expensive than FR4, which is phenolic resin. That's the upside, one which in most cases is actually passed to the consumer.

The downside - paper-based laminates are much more absorbent than FR4. Not wanting to go into a long explanation (google ' PCB outgassing'), FR3 is basically a sponge. The air moisture which is drawn into the material is held there and drawn to and out the walles of the holes once heat is applied in the soldering process, which escapes as you attempt to make a solid solder joint. ON a double sided board it'smuch less of a problem as the palting acts as a barrier (in most cases,not always). On single-sided boards with no plating in the hole, there a straight excape path. Problem is, air and escaping steam can't take the same space and voids occur in the solder joint. If you're lucky, the outgassing will be bad enough that you can actually see the escape path - the hole on top of the solder joint. These you can repair. The ones that cause the problem are the solder joints that look normal to the eye, that are actually hollow inside. It greatly compromises the integrity of the solder connection. FR3 is reliability risk.

THe asorbtion is so great that is soaks up mouisture form the air - a big problem with boards made in tempid environments such as Asia. It'scommon practice to actually bake stored FR3 boards at low temporature prior to assembly. This draws the water out and what we ended up having to do at both Tandon and Western Digital before banning the use of this laminate. I have a lot of experience with this, as I was the quality manager who issued the purge and ban.

In the TT keyboard I installed, there were over 20 bad solder joints. This assembly had not been tested. Further, they didn't pre-tin the wires coming off the board on either side, on the keyboard end or ones which were designed to be soldered onto the 303 main board. The net result of that was there were over 10 broken wires soldered to the keyboard. Long story short, if you buy one of these, do some careful inspection before you go through the misery of trying to install it. It's a pain to troubleshoot."
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