Serge TKB Kit!

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regenbot
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Post by regenbot » Mon Jan 26, 2015 3:34 am

Are you aware of the mouser basket that was linked on order comfirmation email.

This: https://fi.mouser.com/ProjectManager/Pr ... 31e140fb8d
delayed wrote:does anyone have mouser part numbers to panel components section of the BOM?

Or could answer some questions?

What is suggested for the banana jack size?
Part number for the 4x16 pin header 2x8
Part number for the 3x16 pin header 2x8
6 feet 16 conductor FFC ribbon gauge or part number?
What part connects the ribbon to the ribbon to the PCB?
I have never uses ribbon cable before and hardly ever have touched any other types of connectors for DIY. I usually solder directly to components and PCBs.

Thanks.

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delayed
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Post by delayed » Mon Jan 26, 2015 3:47 am

No I was not. Thank you for the link.

edit:
Did anyone get a US Mouser link?

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Post by legionhwp » Mon Jan 26, 2015 7:55 am

Thank you!

Even seen a bit cheaper :guinness:

They have a pic of an alpha one which seems the same indeed. Has anyone bought and used these pots and/or can confirm this is the case?


krok wrote:Erthenvar also carry these Alpha 9mm 50k linear pots.
They seem to be the same as the ones at Smallbear.

http://erthenvar.com/store/9mm-right-angle-pots
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delayed
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Post by delayed » Mon Jan 26, 2015 4:05 pm

edit: change

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Post by Vsyevolod » Mon Jan 26, 2015 4:38 pm

delayed wrote:Did anyone get a US Mouser link?
You can click on the link which takes you to Mourser.de. Then sign in to the German Mouser site and save the TKB shopping basket as a project. Then you have to clear a whole shitload of cookies or else you'll never get back to the US Mouser site. Period. Then sign back in to the US Mouser site and look up your TKB project. Convoluted I know, but it works.

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delayed
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Post by delayed » Mon Jan 26, 2015 4:41 pm

Thank you for the info. I saved it late last night under my mouser projects and could never get back to the US mouser site. I figured I was missing seeing a button or something and went to sleep.

Will clear out my cookies.

Thanks again for the info.

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Post by Altitude909 » Mon Jan 26, 2015 5:02 pm

Vsyevolod wrote:
delayed wrote:Did anyone get a US Mouser link?
You can click on the link which takes you to Mourser.de. Then sign in to the German Mouser site and save the TKB shopping basket as a project. Then you have to clear a whole shitload of cookies or else you'll never get back to the US Mouser site. Period. Then sign back in to the US Mouser site and look up your TKB project. Convoluted I know, but it works.

Stephen




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Open it in an Incognito window if you use Chrome (or whatever the equivalent feature is in your browser), no cookie issues that way

jamb
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Post by jamb » Fri Feb 13, 2015 4:47 pm

just double checking, are the pots the only thing not on the BOM?

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Post by legionhwp » Sat Feb 14, 2015 7:49 am

There is a Chip and mounting hardware included with the TKB PCBS and panel.

Not to state the obvious but you need to buy or make a power supply and case.


:nana: IDEA: It might be very helpful to have a sub-thread here showing builder's chosen options for case and PS. I know there are some generic relatively inexpensive boxes that will work and I'm curious what folks are using for power.

jamb wrote:just double checking, are the pots the only thing not on the BOM?
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Post by Vsyevolod » Sat Feb 14, 2015 7:56 pm

jamb wrote:just double checking, are the pots the only thing not on the BOM?
Also you will need hook-up wire, power supply wire, and a Molex connector (if you want to keep it withing standard specs) and some sort of grommet for the hole in the back of your box.

Personally, I'm modding it with some slightly thicker double-sided foam tape that runs the length of top and bottom of the keyboard as I don't trust the three pieces found at the ends and the middle. The keyboard bends too much and the chance of the pad wires contacting ground seems too great. I've been thinking of drilling out the holes that are for the pad wires to about twice their size for this reason as well.

The power requirements for this panel are rather small, though I don't know what the actual draw is. If you're not combining it with other Serge panels, your options are many.

Any other mods you may want to perform are of course not included in the BOM. A second switch for forward/reverse is the most obvious one plus drilling out a location that seems appropriate.

A sub thread listing all possible mods would also be great. Like which quantizer to fit into the box and how to implement it on the front panel.

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Post by regenbot » Sun Feb 15, 2015 4:44 am

Hmm... maybe a stupid idea, but could this be prevented, by putting some tape over the wires after soldering? Your solution is better of course, just a thought.
Vsyevolod wrote:

Personally, I'm modding it with some slightly thicker double-sided foam tape that runs the length of top and bottom of the keyboard as I don't trust the three pieces found at the ends and the middle. The keyboard bends too much and the chance of the pad wires contacting ground seems too great. I've been thinking of drilling out the holes that are for the pad wires to about twice their size for this reason as well.


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Post by Vsyevolod » Sun Feb 15, 2015 5:14 pm

Actually, it's a good idea. It just means that when soldering, the wires must come off the pad flat instead of straight up like you would normally do.

Once you get the beast in front of you, any solutions that spring to mind are likely to be better than what's there.

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Post by srfnsmy » Mon Feb 16, 2015 1:23 pm

Just placed my order for a TKB! :banana:

Just wondering what everyone in the US did about your POTS order?

I see that Small Bear is out of 50k Alphas:

http://smallbear-electronics.mybigcomme ... -pc-mount/

Thought I read on this thread somewhere that 100k work fine too?

Thanks

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Post by Vsyevolod » Mon Feb 16, 2015 3:44 pm

I participated in a group buy... Got the Alpha pots.

Stephen




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delayed
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Post by delayed » Mon Feb 16, 2015 4:18 pm

How much did the price per unit end up being with the group buy?

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srfnsmy
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Post by srfnsmy » Tue Feb 17, 2015 12:29 pm

Vsyevolod wrote:I participated in a group buy... Got the Alpha pots.
are there any left from the group buy by any chance? not sure how those work, but maybe someone bought extra? would be interested in grabbing some!

:guinness:

also gonna check to see if there are alternatives..

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Post by tekzon » Tue Feb 17, 2015 6:57 pm

thonk was leading this groupbuy, I'm not sure it is still open..
give him a pm.

But since yo are in us, erthenvar got the right pots.
http://erthenvar.com/store/accessories/pots

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Post by srfnsmy » Tue Feb 17, 2015 8:24 pm

tekzon wrote:thonk was leading this groupbuy, I'm not sure it is still open..
give him a pm.

But since yo are in us, erthenvar got the right pots.
http://erthenvar.com/store/accessories/pots
Thanks tekzon! :sb:

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Post by ST.P » Fri Feb 20, 2015 3:34 pm

Hi, i have a problem with my ready build TKB:

it doesn´t work - all LED´s are flashing - that´s all

i´m looking for days to find the fault, but i´m running out of
ideas ... :despair:

the touchplate doesn´t touch the panel, wiring is checked several
times ...

what can cause that symptom?

NEWS: got a tip and i must wait a couple of days to see if the problem
is solved ...


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Post by weedywhizz » Sun Mar 01, 2015 7:30 am

zthee wrote:There is no internal quantizer.

There's a Keyboard Voltage output, which is anything but chromatic. I was just doing some calculations and it's possible to change the output to 1 step = 1 halftone and thus getting a bit over an octave out of the keyboard. It's just 5 resistors that has to be changed.

The output from the pots have to be run through a quantizer if you'd like them to hit an exact note.
Does anyone out there now what resistors need to be changed or if thats already included in the actual BOMs/Layout ?
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Post by iL » Sun Mar 01, 2015 2:26 pm

So far after 2 month ( lots of waiting for parts ) i could power up mine yesterday, then i had to change direction of leds but now it works!

some functions work other then expected, like i was expecting the random select jumps to a random step, but it does not.. its changes the first state memory for a reset. like i sayed i did not expected this behaviour but after some thinking and patching i think this is quite fine.

anyway i have one thing that does not work: Keyboard Pulse

there is nothing happening, no envelope gets triggered, no other sequencer and i hear nothing on a oscillator.

whats the normal behaviour of keyboard pulse out? does it produce a short trigger or does it produce a gate while touching the keyboard?

it comes out from point P on the PCB. is there a schematic around to understand the circuit behind keyboard pulse function to hunt down the problem? i just can see there are some transistors...

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iL
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Post by iL » Sun Mar 01, 2015 2:30 pm

0h yes forgot that question: i think this normal behavior: keyboard voltage does not work in sequencing mode right?

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Post by Vsyevolod » Sun Mar 01, 2015 4:41 pm

iL wrote:...I was expecting the random select jumps to a random step, but it does not.. its changes the first state memory for a reset...
You need to plug a clock source into BOTH random select and reset. This can also be the same as the clock source running the clock input or it can be different. I know... not very intuitive...

The other way it can work is to just plug a clock into the random select and choose the keyboard voltage out. This sounds like the lower half of the SSG sampling the upper half, i.e. not quite random.

Stephen




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Last edited by Vsyevolod on Sun Mar 01, 2015 5:03 pm, edited 2 times in total.

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Post by Vsyevolod » Sun Mar 01, 2015 4:46 pm

iL wrote:anyway i have one thing that does not work: Keyboard Pulse

there is nothing happening, no envelope gets triggered, no other sequencer and i hear nothing on a oscillator.

whats the normal behaviour of keyboard pulse out? does it produce a short trigger or does it produce a gate while touching the keyboard?
Keyboard Pulse sends a gate that goes high when you touch a keyboard pad. It stays high as long as you hold your finger on the pad... a gate in other words. This gate is sent whether or not the keyboard switch is on or off.

Stephen




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Post by Vsyevolod » Sun Mar 01, 2015 4:49 pm

iL wrote:keyboard voltage does not work in sequencing mode right?
The output from the Keyboard Voltage jack works based on the active stage, thus it will output an increasingly higher voltage from left to right depending on which stage is selected, whether that is being selected by the finger or by the clock advancing the stage. This is also not affected by the keyboard switch being on or off.

Sounds like you have some troubleshooting in your near future...

Stephen




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