Although I have a perfourmer , I cant really comment about the Filter ENV Amount because It has been in storage for many years now. Last time I had it opened up , it was when I was trying to add custom CV I/O , but since I had no schematics of the main board and the CV expansion , I had no success d...

Sounds like a dirty LP/BP/HP selector switch. Have you tried cleaning it ?

Due to some life changing events, I was not able to keep up with this thread . After doing my research , the most logical explanation that i have found about DPST in European PSUs, is that a lot of European countries use symmetrical plugs like schuko and when plugged in the outlet , there is no way ...

Thanks for the reply;) There is no chance of sourcing the original GA80671 transformer (European/Australian/Universal) as a replacement part. I am planning on swapping the GA80661 (Japan/US) that I have, with a custom 75W toroidal center tapped transformer 18V-0-18V. Also planning on replacing the 1...

I have a Japanese CS30 that works on 100V and I would like to modify the PSU so that it works on 230V. (Europe) I thought that a simple transformer + fuse swap could do the trick, but it seems to be more complicated than that. As you can see on the schematics the Japanese version uses a SPST switch ...

Turntables can be used creatively as instruments. There are scratch vinyls that contain all the classic analog waveforms, noise, drones etc. You can use the mixer's fader for note on/off operation and your hand in order to modulate the pitch. If you develop the appropriate skills, it is possible to ...

Seymour Clufley wrote: Can you tell me what happens when you do that?

Yekuku wrote: You can also get bursts/thunders by modulating the cutoff with noise.....

Noise provides random modulation of the cutoff frequency.

Monotron Delay is awesome but it does not have any resonance control, which is the basic ingredient of wind sfx. Of course you can mod it and get the resonance you want, or you can use the delay feedback for similar results. I was filtering old radios/TVs since I was a kid , you can get so many wave...

As Commodorejohn very well pointed out , a common programmers approach to wind SFX is by using noise as a sound source and passing it through a high resonant low pass filter. Usually an Lfo or an envelope is used to control the cutoff frequency in order to provide the wind sweep. Different types of ...

Comparing cards is a very good idea for not having to remove components off the pcb in order to test them. Did you try adjusting the Transposition Gate Zeroing ? Any results? Also check the cables that connect KAS to M1, loose connections or semi-broken wires on solder tabs can result in an increase...

Hi Aanon, when resistors fail they get open or go up in value. I havent seen anyone going down in value yet. Resistors should be measured out of the circuit, as most electronic components. But it is nearly impossible to remove all resistors for testing purposes , so most of the times they are measur...

Looks like you have a problem with the keyboard offset or the transposition gate zeroing circuit of the m1 card. I suggest checking all electrolytic caps and also resistors that may have gone up in value in that card. I assume that you have gone through the calibration procedure correctly: 1) Transp...

Looks like an ordinary ceramic capacitor 0.1uf with +/- 20% tolerance that is used for decoupling ICs , nothing special about it.
Even with a small piece cracked, I am pretty sure it will hold most of its capacitance, so the unit should work.

The accuracy that is needed is 4V +/- 0.1% which is actually 3.996V to 4.004V . Even if you own a fluke multimeter , I doubt that you ll get a reading that accurate. My advise is to increase the (TU) voltage in steps e.g 4.01V, 4.02V, 4.03V, 4.04V ....until you get the range that is needed from the ...