Thanks for the forum and community Mike.

Is it too late for boats? If not then 2 for me please!

I have a strange issue with intermittent stuck notes on a MIDI Implant/Gatebooster. Having provided a fully tested and calibrated TTSH to someone last week I had to return to address issues he was experiencing with stuck notes. I took my own TTSH to see if I could replicate the fault on that one too...

I currently have a V2 for sale (the last of 4 builds from this batch).

I will be building another 4 this coming year starting end of February.

I also build ARP 2600 replica cases for the TTSH. There are pictures earlier in this thread.

References available.

Nice work el-bee! Just did my final run of cases. Had the ever watchful Roger the cat to oversee quality control once again. http://i279.photobucket.com/albums/kk129/ali_g12/1_zpsvgraxlht.jpg http://i279.photobucket.com/albums/kk129/ali_g12/5_zpsguox9oya.jpg http://i279.photobucket.com/albums/kk129/...

After doing a a thorough calibration and redesigning the normalisation today i have decided to get to the bottom of this. I can get a square wave out but no sine. Have checked my connections to the output PCB where the jacks are mounted and all appears OK. Need a schematic to get a better idea. Sugg...

I have just completed a build and am implementing the final mods (MIDI + gatebooster, Osc sync) and I checked the power test points and noticed that they had crept up to 16v. Now I can't seem to trim them any lower than +/-15.5V. I remember trimming them to 15.00V after building the power section an...

In the process of building some more TTSHs. References available.

https://www.muffwiggler.com/forum/viewt ... 12#2016812

I finished my TTSH V2 over the weekend, it just needs a case, gate booster and VCO sync mod. Thankfully it worked first time :yay: Nice wiring. :help: Having problems with my (non-gateboosted) MIDI Implants on both my TTSH builds: The gate signal from the MIDI implant doesn't seem to trigger the en...

............I have discovered that on the unit that won't calibrate all three pins of the 25K trimmer have continuity to the CV input. The unit that will calibrate has pin 3 on the trimmer with continuity to ground. It seems that this is the root of the problem. Can't work out where the short is at...

I also seem to have some problem with oscillator frequency sliders affecting each other ie. with only OSC 1 turned up on the mixer I can change the pitch slightly with the OSC2 and OSC3 frequency sliders. It seems the problem with the frequency sliders affecting each other is due to the fact that I...

For two days I've been fighting a weird V/oct calibration issue on all three VCOs. The VCOs calibrate perfectly at low C and high C, but all the pitches in between are progressively flat with middle C being the most flat at almost a semitone. And all the pitches outside of low C and high C are also...

I can build you a flightcase: https://www.muffwiggler.com/forum/viewtopic.php?t=143938&highlight= http://i279.photobucket.com/albums/kk129/ali_g12/IMG_1118_zpskklryvik.jpg http://i279.photobucket.com/albums/kk129/ali_g12/IMG_1105_zpsdu8xdyun.jpg http://i279.photobucket.com/albums/kk129/ali_g12/IMG_1...

A couple of TTSHs came into the world today under the watchful eye of Chairman Miao: http://i279.photobucket.com/albums/kk129/ali_g12/IMG_1134_zps7ea9ndqu.jpg http://i279.photobucket.com/albums/kk129/ali_g12/IMG_1118_zpskklryvik.jpg http://i279.photobucket.com/albums/kk129/ali_g12/IMG_1137_zpsxmzxcd...

All work overseen by the chief architect - Chairman Miao: http://i279.photobucket.com/albums/kk129/ali_g12/IMG_1134_zps7ea9ndqu.jpg http://i279.photobucket.com/albums/kk129/ali_g12/IMG_1130_zps7fqjbxfl.jpg http://i279.photobucket.com/albums/kk129/ali_g12/IMG_1105_zpsdu8xdyun.jpg http://i279.photobuc...

Hi Folks, Been TTSHing for the past couple of months and ended designing and building a replica ARP 2600 roadcase. I intend to do a small run of these for sale and will post an ad up in the for sale section (not sure if I've got enough posts yet!). I intend to just do half flight cases without lid u...

Oh. You posted this in the Ver 1 thread, but you have a ver 2 board. Then it's a whole different kettle of fish. Might want to try this question in that thread - https://www.muffwiggler.com/forum/viewtopic.php?t=130493 Oh, I think I know what's going on. Do you mean the thing labeled jumper between...

Can anyone provide further advice on the likely cause of the problem and any fault finding techniques I can use to try and locate it. Thanks in advance. sduck gave you a very good hint: isolate the fault by testing the various sub sections on their own. disconnect the supply voltage from all sub mo...

The only thing that jumper in the power section does is connect two parts of the ground plane that normally shouldn't be connected. So removing it shouldn't change the + or - line voltages. There is most likely a solder bridge somewhere, or something like that. The good thing about ver 1 is that yo...

The only thing that jumper in the power section does is connect two parts of the ground plane that normally shouldn't be connected. So removing it shouldn't change the + or - line voltages. There is most likely a solder bridge somewhere, or something like that. The good thing about ver 1 is that yo...

I'm quite far into building two TTSHs and have encountered what I think is a problem with the +ve power rail on both boards. One board is 99% complete in terms of components with only jacks, switches and sliders not yet installed. The other board is also missing these parts and and, in addition, all...

To test if that is true: connect the device to a source of programmable MIDI data and send a test sequence of notes all with the same, low, velocity. The measured pitc CV would be much more repeatable if velocity is not changing and is the voltage being output for velocity is low. I guess I've alre...

Perhaps velocity CV is affecting the pitching CV via crosstalk in the multiplexer? I don't know what 4067 you are using but for this one: http://www.nxp.com/documents/data_sheet/HEF4067B.pdf It states that the (typical) crosstalk is 50mV for VDD=10V. The multiplexer is a HEF4067BP. I'm no electroni...

I have found another MIDI controller to test and this has the same effect on pitch, higher velocity = higher KCV/pitch. This controller has a number of velocity curves and when I turn the velocity control to a flat response the problem is solved. Pitch is constant at all velocities. However, I would...

So the third option is that some other variable signal is being mixed in - and it is. Thanks Nantonos - I'm beginning to get to the bottom of this now. I have noticed that the tuning is sensitive to the velocity of the key strike so if I gently push the key repeatedly to try and achieve the softest...