Search found 185 matches

by Broadwave
Mon Dec 01, 2014 11:52 am
Forum: Music Tech DIY
Topic: moog ladder filter - nonlinear resonance
Replies: 11
Views: 3557

Re: moog ladder filter - nonlinear resonance

so what's that fix that makes the resonance linear? this is the schematic of the Source filter The only Moog VCF I've ever built was the Minimoog one (resonance roll off at low freq). It's taken a while but I now appreciate the subtleness of it :) I can only guess that the 3080 OTA in the Source VC...
by Broadwave
Sat Nov 29, 2014 8:51 am
Forum: Music Tech DIY
Topic: Dye Sub printing aluminium
Replies: 17
Views: 2733

I used dye sub for a while with great results, although it's quite expensive and leaves a hi-gloss finish - I got the prepared aluminium from Mega here in the UK. It's very thin so you need another aluminium panel behind to support it https://farm9.staticflickr.com/8596/15717853750_d298d7b379_b.jpg
by Broadwave
Thu Nov 27, 2014 3:46 am
Forum: Music Tech DIY
Topic: Any projects that use up these Bourns LED Linear Faders?
Replies: 4
Views: 373

Baby 10 Sequencer to go with the Turing Machine?
by Broadwave
Sun Nov 23, 2014 3:15 am
Forum: Music Tech DIY
Topic: ARP2600 with DIY modules?
Replies: 12
Views: 1062

Did you see this one? Awesome :tu: I'll take that as a compliment then ;) I started building this the same time Zthee planned the TTSH, with the same thing in mind (to provide it as a kit). He finally beat me to it, so I only ended up with the one prototype. It's full size, but used the same 45mm L...
by Broadwave
Fri Nov 07, 2014 12:49 am
Forum: Music Tech DIY
Topic: Making a power supply
Replies: 27
Views: 2774

In theory, yes - although personally, I wouldn't.

You may have problems with ground loops, and your regulators will probably get very hot (dropping down from 20v!! - normally for 12v you'd use a 15v TX)
by Broadwave
Tue Oct 28, 2014 1:44 am
Forum: Music Tech DIY
Topic: ARP A2803-003-1
Replies: 17
Views: 1957

(off-topic as it were) Does the 4027 schematic floating about on the net resemble the sub-module? I'm tempted to copy it but it's pretty advanced in comparison to the 4027-1. Robert The 4027 schematic is the 3rd revision of the 2600's VCO module - the previous two were the 4011 & 4017. Subjectively...
by Broadwave
Mon Oct 27, 2014 2:00 pm
Forum: Music Tech DIY
Topic: ARP A2803-003-1
Replies: 17
Views: 1957

I have the original blueprints and schematics of the 4027-1, and both FET's are definitely marked up as 2N5459 and the pinout, as per your pic, is correct.

I think you'll find that the drain and source in this case are interchangeable, it doesn't matter which way round they go.

Hope this helps.
by Broadwave
Sun Oct 26, 2014 12:24 am
Forum: Guitars, Basses, Amps & FX
Topic: DIY Janglebox (Comp/Sustainer) - Built
Replies: 0
Views: 663

DIY Janglebox (Comp/Sustainer) - Built

I need a break from building synths... so: I'm just about to receive a 12 string "Chickenbacker", which I profoundly apologize for - I just wanted a cheap 12 string (I'm not a particularly good guitarist, and £2k for a genuine Rick wouldn't go down well with my bank manager!) and I was inter...
by Broadwave
Tue Oct 14, 2014 12:47 am
Forum: Music Tech DIY
Topic: ARP 3620 clone project
Replies: 450
Views: 41801

reggiechacha wrote:I got a Roland SH3 keybed the other day, but not sure if its a double contact or not. Can anyone advise me?
I've looked at the SH3 schematics (page 7/8), and yes it looks like it's a dual contact/bus "normally open" keyboard... you should be good to go.
by Broadwave
Mon Oct 13, 2014 12:46 pm
Forum: Music Tech DIY
Topic: ARP 3620 clone project
Replies: 450
Views: 41801

I've made a small mod to my original 3620 clone (Pre-Kipling), but it's something you may be interested in: External 1v/Oct input (I use it with Arturia's Beatstep). It enables you to transpose any external 1v/Oct CV via the keyboard. I've found it quite useful, as the 2600 CV input cuts off the key...
by Broadwave
Wed Oct 08, 2014 6:22 am
Forum: Your Tunes Here
Topic: Korg Kronos - Orchestral Piece (Bond Parody?)
Replies: 1
Views: 193

Korg Kronos - Orchestral Piece (Bond Parody?)

I have no idea what dark recess of my mind this crawled out of... Probably listening to far too much John Barry :eek: . It's been swimming around my head for months but I finally gave in to the idea of an "Orchestral" arrangement... shame I can't sing though (so I didn't) :sadbanana: The Korg Kronos...
by Broadwave
Wed Oct 08, 2014 2:25 am
Forum: Music Tech DIY
Topic: Designing panel layouts
Replies: 46
Views: 7289

I use Illustrator for everything... that way I can ensure that sliders, switches etc always line up perfectly. I get my panels laser cut, powder coated and finally screen printed (all locally). It can be expensive, but it depends what your budget is and how professional you want the final result to ...
by Broadwave
Thu Sep 25, 2014 1:15 am
Forum: Music Tech DIY
Topic: Low Cost Oscilloscope
Replies: 9
Views: 1314

Re: Low Cost Oscilloscope

Looking for a low cost oscilloscope to use with various projects including the TTSH one. Does anyone recommend this one http://www.virtins.com/P601PC-P601PPC.shtml Be careful of PC "Sound Card" or USB based 'scopes... they tend to block the DC component. Check first. I'm happy with this... DSO-201,...
by Broadwave
Mon Sep 15, 2014 9:11 am
Forum: Music Tech DIY
Topic: Found a nice beatbox project from 1976...
Replies: 10
Views: 955

LektroiD wrote:
Do you still have your build of this? Any demos?
Afraid not on both accounts... It was a looooong time ago.
by Broadwave
Sun Sep 14, 2014 2:48 am
Forum: Music Tech DIY
Topic: Found a nice beatbox project from 1976...
Replies: 10
Views: 955

I'm showing my age here, I built this when it was first published. I had a problem that the oscillators wouldn't "ring"... it wasn't until I changed the 4011 CMOS chips to the UB (unbuffered) version that it worked.

I used to use it live, but in a hot humid pub/club/ the tempo would go crazy.
by Broadwave
Tue Sep 09, 2014 1:03 pm
Forum: Music Tech DIY
Topic: MiniBrute Schematics and Hacks now online
Replies: 12
Views: 2256

MiniBrute Schematics and Hacks now online

If you haven't heard already, Yves Usson (YuSynth and designer of the MiniBrute) has created the "Hack a Brute" site which contains all the schematics, analogue and digital.

http://hackabrute.yusynth.net/index_en.php?&arg=1
by Broadwave
Mon Sep 08, 2014 12:59 pm
Forum: Music Tech DIY
Topic: modulation orgy - cliff jack replacement
Replies: 4
Views: 397

Hi mOBiTh,

I replaced about 130 on my modular. I had the first gen Cliff sockets (yup, THOSE ones).

I got the new ones from Rapid Electronics here in the UK, they are far better... no more cable wiggling headaches, but still expensive even in bulk quantities.
by Broadwave
Mon Sep 08, 2014 5:52 am
Forum: Music Tech DIY
Topic: I have a pile of CEMs - How do I test them?
Replies: 15
Views: 1103

Just been going through these, there's actually a lot more rarities than I initially thought... 7x CEM3310 (EG) 6x CEM3320 (VCF) 6x CEM3330 (VCA) 1x SSM2020 (Dual VCA) 1x CA3080E (OTA) 1x LM3080N (OTA) 1x M083 B1 (Monolithic Tone Generator) 24x TDA1008 (Gating/Frequncy Dividers) Did you break down ...
by Broadwave
Sun Aug 24, 2014 1:08 pm
Forum: Music Tech DIY
Topic: Two Thousand Six Hundred (TTSH) Ver.1 General build thread
Replies: 2929
Views: 288451

I love my TTSH and its a damn fine instrument. Today there's folks on VSE trying to knock it by saying it doesn't sound like a real 2600, but with no evidence of them playing one side by side in comparison. Perhaps they're pissed they mortgaged their house for their 2600 while we built ours for con...
by Broadwave
Sat Aug 02, 2014 11:01 am
Forum: Music Tech DIY
Topic: [kits/PCBs] ACXSynth MIDI2CV -- an accurate DIY MIDI-CV
Replies: 657
Views: 58081

I've just built Hexinverter's MIDI2CV (5.7.3). Everything is working as expected, except that I seem to get a slight "overhang" on the Mono gate output (Not ventured into Poly Mode yet) - if I take my finger off a key, the gate signal continues for a tiny fraction of a second afterwards... it is not...
by Broadwave
Mon Jul 21, 2014 2:41 am
Forum: Music Tech DIY
Topic: Reasonably priced source of UA726 (or clones)?
Replies: 27
Views: 6903

ringroad1 wrote:I was looking at the CA3046 as a possible replacement, and in particular at the Doepfer A-110 schematic.
I bought 3 x Roland System X VCO's from Frequency Central and added the 3046 Doepfer heater (Stuff I've Built link below)... Works very well. Used them in my "Moggy" clone.
by Broadwave
Sat Jul 05, 2014 6:21 am
Forum: Music Tech DIY
Topic: hexinverter/ACXSynth MIDI2CV firmware: 5.7.3
Replies: 284
Views: 33507

Yes you do! Do you have sequencer program? If cubase... Connect your sound card midi out to the midi2cv midi in, open a new project, open a midi file, there you go, do what ever you need :) Ahh, if only it was that simple :despair: Internally, the MIDI keyboard out goes directly to the MIDI-CV in. ...
by Broadwave
Sat Jul 05, 2014 6:13 am
Forum: Music Tech DIY
Topic: hexinverter/ACXSynth MIDI2CV firmware: 5.7.3
Replies: 284
Views: 33507

isak wrote:Wait...
Isn't it Andy's work?
Hi Isak... Yes, it's me... different forum, different name (just to confuse people) :hihi:
by Broadwave
Sat Jun 28, 2014 4:27 am
Forum: Music Tech DIY
Topic: hexinverter/ACXSynth MIDI2CV firmware: 5.7.3
Replies: 284
Views: 33507

Oh.... I'm an idiot :doh:

I've recently built a Minimoog clone with the intention of using this MIDI/CV converter... but of course I've chopped of the lower keys to get the 3 1/2 octave keyboard.

The keys I've taken off control the extra parameters, now I've got no way of switching modes... Grrrr!
by Broadwave
Sat Jun 14, 2014 9:16 am
Forum: Music Tech DIY
Topic: Two Thousand Six Hundred (TTSH) Ver.1 General build thread
Replies: 2929
Views: 288451

I'm a little curious, was the pitch of your VCO's rock solid or did they slightly modulate (~1 to 5 cents) when setting either VCO to LF in your MkII 2600? No, I don't recall having any problems you describe, nor with my clone. Pretty solid VCOs even in LF mode, certainly no cross modulation withou...

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