Search found 268 matches

by jdelgoulet
Sat May 04, 2019 12:12 pm
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

@ganders : they are back in stock :party:
by jdelgoulet
Tue Apr 23, 2019 6:04 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

@oiseaux : If you change VCO-3 waveform, does it change on your scope too ?
I'm asking 'cos one possibility is that you've got some bleed thru coming from the mod-mix section ...
by jdelgoulet
Wed Apr 03, 2019 9:04 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

Basically, steps 4, 5 and 6 are part of 'the same step' : you need to null the offset between signals you have on TP10 and TP11. You could read it : Connect oscilloscope channel 1 to TP10 - VCA input. You should observe oscillator 3 waveform. Then , connect oscilloscope channel 2 to TP11 - VCA outpu...
by jdelgoulet
Sat Jan 26, 2019 9:59 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

By the way, do you have this behaviour when the glide is engaged (switch 'On') or all the time when you use the main CV input ?
by jdelgoulet
Sat Jan 26, 2019 4:59 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

Is there a reason you did not put v-trig to s-trig converter in front of the gate input at the glide circuit? : yes. There is no need since the circuit expect a V-Trig signal (+10v) On my MME, the glide circuit works with s-trig, and does not work with v-trig (+5V gate) : unfortunately this is what...
by jdelgoulet
Fri Jan 25, 2019 10:02 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

That is interesting. So it seems a S-trig works for you (for the glide) but in the MME (like in the real Minimoog) the glide works with a V-Trig signal. On the real Mini, the V-trig is at +10v but a +5v showed that it was enough so I did not modified the original circuitry. On the MME, the gate sign...
by jdelgoulet
Thu Nov 15, 2018 8:32 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

About what ?? a Boog ?? Never heard of that ... :bang: :bang: :hihi: More seriously, I haven't. Some did. I received one comment saying the boog was more 'greety' than the MME - not sure what that means in real life. I had other comment from people owning a real Mini saying the sound of their MME wa...
by jdelgoulet
Thu Nov 15, 2018 5:19 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

For those who will buy a parts kit from SynthCube (https://synthcube.com/cart/guinguin-mme), be sure to buy the PCB+Panel without the rare parts from my shop. Thanks for the kind words fuzzbass ! One correction thought : pdf of the schematics for this project are available to anyone who buy a kit fr...
by jdelgoulet
Tue Nov 13, 2018 8:22 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

Unfortunately there is no Mouser Cart. The main reason is that components, in order to get a cheaper MME, should be ordered from multiple places.
Concerning the SMD soldering I would say that if you are meticulous this won't be hard : the more 'complicated' being the LM3046.
by jdelgoulet
Thu Nov 08, 2018 11:55 am
Forum: Music Tech DIY
Topic: Minimoog Model D Clone: Photos, Layouts & BOM
Replies: 40
Views: 4939

If I were sure I would make a bunch of "real size" front panel PCB so that the MME analog board could be plugged in directly ...

Very nice work Kevin. Looks already awesome !
by jdelgoulet
Mon Nov 05, 2018 10:23 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

If you set the MOD-MIX knob to "N" (left position), what do you have on TP-10 ? TP-10 is the output of the modulation mix circuitry and should output either Noise/ Osc3 or a mix of both. You can : - check the orientation of Q92 , Q93 and Q91 - Make sure that Q92 and Q93 are matched. - Make sure that...
by jdelgoulet
Thu Sep 06, 2018 4:00 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

aethyr wrote:I need help repairing a MME. Anyone have enough experience with these that feels comfortable fixing it?

PM me.
You've got a message.
Julien
by jdelgoulet
Fri May 04, 2018 8:11 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

Test #6 : - Apply a variable CV to the EXT-MOD input and check if frequency of all the VCOs change. Now, even if you answered it already, I would like you to reflow all the resistors that have a green circle (and more) and send me a photo when this is done. I'm asking this because, for VCO-2 for exa...
by jdelgoulet
Wed May 02, 2018 1:41 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

@Smonk : Test #4 : - Voltage at pin 6 of IC-6 while changing frequency knob of VCO-2. - Voltage at pin 6 of IC-10 while changing frequency knob of VCO-3. Test #5 : - Voltage at pin 3 of IC-6 while changing frequency knob of VCO-2. - Voltage at pin 3 of IC-10 while changing frequency knob of VCO-3. h...
by jdelgoulet
Wed May 02, 2018 1:24 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

@Jop : thanks for the kind words !
Before selecting a new transistor did you have a try adjusting R328 (cf picture below). Otherwise Q86 is the 'noise' transistor (cf picture below).

Image
by jdelgoulet
Tue May 01, 2018 12:31 pm
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

Is it me or I'm seeing a lot of bad solder joins ?

Image
by jdelgoulet
Tue May 01, 2018 1:01 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

It means that the issue is not on the octave switch or octave switch buffer and as thought around the expo converter. We will now try to track down which part of the expo is faulty. Let's start with the following test : Test #3 : - Voltage at pin 6 of IC-2 while changing octave of VCO-1. - Voltage a...
by jdelgoulet
Mon Apr 30, 2018 7:33 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

(grrrr 1% resistors :bang:) Test #1 : - Voltage at pin 6 of IC-4 while changing octave of VCO-1. - Voltage at pin 6 of IC-8 while changing octave of VCO-2. - Voltage at pin 6 of IC-13 while changing octave of VCO-3. Test #2 : - Voltage at collector of Q6 while changing octave of VCO-1 (or pin 2 of Q...
by jdelgoulet
Sun Apr 29, 2018 4:30 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

So, just to be sure : ----- Test 1 ----- #1 : Remove the ICs : 5, 9 , 12, 2, 6 10, 1, 4, 8, 14 and 13. #2 : Check both +10v and -10v at those IC using : - +10v pdf - -10v pdf #3 : Plug the ICs back #4 : Recheck +10v and -10v voltages. ----- Test 2 ----- Most of people mistakes when building the MME ...
by jdelgoulet
Sat Apr 28, 2018 12:21 pm
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

I'm having trouble with my build. Osc 1 works fine, but 2 and 3 only gives a high frequency output, regardless of octave setting and CV input. On osc2 the frequency knob goes from 1530 to 3250hz, on osc3 it has no effect. Filter tracks fine. Wave shapes look ok. All voltages seem ok. Any ideas wher...
by jdelgoulet
Wed Apr 04, 2018 2:52 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

Measuring the AnalogBoard -4v Test Points I get -3.85v Ok or what do I adjust? Edit: A more worrying note is that I get no sound but noise. Noise can be turned up and modulated, but nothing else. 3.85v is ok. On the analog board check if you have waveforms on the 3 molex headers. Bottom pin of each...
by jdelgoulet
Sat Mar 24, 2018 2:31 pm
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

Hi, how accurate should the transistor matching be? I have a 3 3/4 precision multimeter, I get values between transistors like 0.600mV, 0.588mV, etc, do I need a strict matching? Or is some tolerance allowed? Thanks in advance :) No need for strict matching. According to the Minimoog service manual...
by jdelgoulet
Sat Mar 24, 2018 11:19 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

Like mentioned previously for @studyman : Chances are that you have some bad solder joins on IC23. Try re-soldering but be careful note to destroy the pad since they are SDM components. Using your multimeter : do some continuity tests between the regulator pins (taken on the regulator) and the pad o...
by jdelgoulet
Fri Mar 23, 2018 5:20 pm
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

Chance are there is a bad solder join on the SMD regulator : IC23.
by jdelgoulet
Fri Mar 23, 2018 4:44 am
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1945
Views: 280961

Re: guin guin MME calibration

Hie everyone, i 'm calibrating the MME minimoog clone and I've got -2V between TP6 and GROUND, TP4 and ground but i've got the good +10 for TP8 (oscillo 3). I've got the correct -10V at TP1/TP3/TP5/TP7... any idea of the problem please ???? the -2v start at R18 and R63, before, i've got the good +1...

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