Search found 49 matches

by thombet
Sun Sep 13, 2020 2:00 pm
Forum: Buchla, EMS & Serge
Topic: MARF 248r source code available
Replies: 219
Views: 15931

Re: MARF 248r source code available

Here's a little video demonstrating the new "swing" feature in the upcoming MARF v2.5 release. The MARF is externally clocked and is generating the "swing" you hear from a straight time clock. Enjoy! Steven Wow very excited! I also received a new PCB with a pre solderd STM32 microcontroller from Sa...
by thombet
Thu Sep 10, 2020 4:57 pm
Forum: Music Tech DIY
Topic: 73-75 Serge panels from Zthee
Replies: 472
Views: 62776

Re:

What sort of range are people getting on the Negative Slew? I intended to calibrate mine the original way, with the max frequency at 1kHz on the top one. But, it maxed out at around 900Hz. And that that frequency, the min frequency was around 6Hz - waaay too high for me. Now I have them both calibr...
by thombet
Mon Sep 07, 2020 2:42 pm
Forum: Music Tech DIY
Topic: 73-75 Serge panels from Zthee
Replies: 472
Views: 62776

Re: 73-75 Serge panels from Zthee

thanks Tele_player, will run a ground wire for those jacks. aha that bend cap i saw it, but i didnt make the link with a space issue so thanks for that tip as will! i also send a mail to Jon and he replied the cap had a wrong orientation on the foto and the silkscreen printing is correct :) now off ...
by thombet
Sun Sep 06, 2020 5:08 pm
Forum: Music Tech DIY
Topic: 73-75 Serge panels from Zthee
Replies: 472
Views: 62776

Re: 73-75 Serge panels from Zthee

hi everyone love the build of these panels and the calibration is going smooth but i came across some issues. 1) in the reverb preamp section there are 2 22uF caps between the preamp pot and the mix pot. is the silckscreen print and grounpath wrong or is the example pic wrong ==> http://www.73-75.co...
by thombet
Mon Aug 17, 2020 2:23 pm
Forum: Buchla, EMS & Serge
Topic: MARF 248r source code available
Replies: 219
Views: 15931

Re: MARF 248r source code available

Wow! Super news :)))
by thombet
Sat May 23, 2020 2:46 am
Forum: Buchla, EMS & Serge
Topic: Samodular Buchla kits
Replies: 20
Views: 2214

Re: Samodular Buchla kits

I build the 266, 248 and now working on the 281 kit from Samodular. The kits are very good, everything is well packed and labelled so it saves time to build these modules! great work Steffen! i also bought 2 cases from Samodular: one for the 208 clone and a 18U case and they are great! no problems s...
by thombet
Sat May 09, 2020 1:08 pm
Forum: Buchla, EMS & Serge
Topic: MARF 248r source code available
Replies: 219
Views: 15931

Re: MARF 248r source code available

Wow some big improvements! trying it out tonight! thanks! Hi, This is to let you know that there is a new beta release of MARFv2.5 firmware available for you to download. Give it a go. As always feedback is appreciated. Here is the file: MARF_v2.5b3.hex.zip MARF v2.5b3 release notes Bug Fixes: 1) Fi...
by thombet
Fri May 08, 2020 10:20 am
Forum: Buchla, EMS & Serge
Topic: Buchla format clone panels
Replies: 25
Views: 2250

Re: Buchla format clone panels

Very nice! top notch indeed!

any change for the Buchla 296? :hyper:
weedywhizz wrote:
Mon Mar 16, 2020 2:17 pm
291 panels should arrive this week.

212 Dodeca and 277 panels are being produced currently :party:
by thombet
Wed May 06, 2020 4:23 pm
Forum: Buchla, EMS & Serge
Topic: MARF 248r source code available
Replies: 219
Views: 15931

Re: MARF 248r source code available

thanks Steven!

stevenb wrote:
Tue May 05, 2020 11:14 am

Pretty slick, tele_player . I like that.
Sorry Thomas, I'll post a .hex file next release

Steven
by thombet
Tue May 05, 2020 5:49 pm
Forum: Buchla, EMS & Serge
Topic: MARF 248r source code available
Replies: 219
Views: 15931

Re: MARF 248r source code available

turns out there was ground problems because of flux... well i cleanded everything for the 3th time and it al works like a V2 should work. now off for some testing of the new 2,5 A6 en A8. Thanks for the tip Tele_player. I tested the V2,5 a6 but that did not work for me. I started to look for solders...
by thombet
Tue May 05, 2020 3:05 am
Forum: Buchla, EMS & Serge
Topic: MARF 248r source code available
Replies: 219
Views: 15931

Re: MARF 248r source code available

I tested the V2,5 a6 but that did not work for me. I started to look for soldershorts but instead i found some ground shorts on some chips of the motherboard. IC 13 sn74hc165 Pin 14 shorts to ground this is weird cause al the other SN74HC165 CHIPS has their Pin 14 run to the switches, IC 13 has this...
by thombet
Tue May 05, 2020 2:51 am
Forum: Buchla, EMS & Serge
Topic: MARF 248r source code available
Replies: 219
Views: 15931

Re: MARF 248r source code available

Hi steven

i'm using the stm32cubeprogrammer for mac. it says i cant open .bin files all the other versions where in .hex when i extracted them from the zip file you shared.
by thombet
Mon May 04, 2020 8:12 am
Forum: Buchla, EMS & Serge
Topic: MARF 248r source code available
Replies: 219
Views: 15931

Re: MARF 248r source code available

Wow great work you guys are doing here! many thanks for the effort! i tried to download version 2.5a8. but my programmer cant run the .bin extension. Is there a .hex available? thanks thomas B Thanks so much for making this available! I've just built my MARF and flashed the latest version of the fir...
by thombet
Sun Mar 22, 2020 12:29 pm
Forum: Music Tech DIY
Topic: 208 ToolBox build thread.
Replies: 19
Views: 1233

Re: 208 ToolBox build thread.

opend up my 208 found that my +15 had a bad solder!


thanks papz
by thombet
Sun Mar 22, 2020 12:07 pm
Forum: Music Tech DIY
Topic: 208 ToolBox build thread.
Replies: 19
Views: 1233

Re: 208 ToolBox build thread.

okj

15v on -15 pad

and no volts on the +15 pad... well to be exact -0,64v

seems i found my problem but how to fix it?
by thombet
Sun Mar 22, 2020 11:51 am
Forum: Music Tech DIY
Topic: 208 ToolBox build thread.
Replies: 19
Views: 1233

Re: 208 ToolBox build thread.

Hi papz, i have a problem with my 208 toolbox. None of the leds work on the CV mixer or Envelope gen. Cv in works on the envelope gen but when self is selected nothing happens and the evenvelope goes out. the cv for the stages work but i cannot select 2 stages... when i switch to front panel on the ...
by thombet
Tue Jul 09, 2019 5:35 am
Forum: Music Tech DIY
Topic: 208p build thread (papz's PCBs)
Replies: 819
Views: 62814

regarding the bleed issues via the Timbre i thought they where gone but hey they were back as soon as i started turning my main volume nob to 0 and disapeard when i ramped up the volume again. this is the same on the headphones out. so i looked at the schema's and tracked down where timbre comes fro...
by thombet
Mon Jul 08, 2019 4:33 am
Forum: Music Tech DIY
Topic: 208p build thread (papz's PCBs)
Replies: 819
Views: 62814

papz wrote:Maybe a bad contact ?
found a bad contact on switch 1 sequencer is fixed!

thanks for the support!
by thombet
Sat Jul 06, 2019 4:01 am
Forum: Music Tech DIY
Topic: 208p build thread (papz's PCBs)
Replies: 819
Views: 62814

i found no solder bridges or solder faults but did an extra flux cleaning. the Result is that the bleed is gone :yay: but now i lost my sequencer again. It doesnt respond to the pulser when set in this position. i replaced the 4001 and 4066 with serval other 4001 and 4066 but no result so far what t...
by thombet
Sat Jun 29, 2019 10:57 am
Forum: Music Tech DIY
Topic: 208p build thread (papz's PCBs)
Replies: 819
Views: 62814

tobb wrote:
thombet wrote: i found that the osc bleed increases in volume when i increase the timbre of the complex osc. when the timbre is at 0 there is no bleed.

any suggestions?
I would also checking all solderjoints..
will do thanks tobb!
by thombet
Sat Jun 29, 2019 10:26 am
Forum: Music Tech DIY
Topic: 208p build thread (papz's PCBs)
Replies: 819
Views: 62814

i removed the faulty 4001 ic. the pulser is now triggering the sequencer. thanks Papz!

i found that the osc bleed increases in volume when i increase the timbre of the complex osc. when the timbre is at 0 there is no bleed.

any suggestions?
by thombet
Sat Jun 29, 2019 8:38 am
Forum: Music Tech DIY
Topic: 208p build thread (papz's PCBs)
Replies: 819
Views: 62814

The sequencer and pulser should work without modification. Most issues are chip related, 4001 and 4016 are good suspects. Some 4001 even show ok in an IC tester but don't work in the actual circuit. Some C&K on-on-on switches are faulty from the factory, did you do a continuity test between its pol...
by thombet
Sat Jun 29, 2019 8:14 am
Forum: Music Tech DIY
Topic: 208p build thread (papz's PCBs)
Replies: 819
Views: 62814

Swapping or adding resistors around or changing their values is not the good way to fix a build error. The 2.2M resistor is between the -15V rail and sequencer pulse in (top 12 contact) of the program card slot and may upset its proper operation. Regarding bleeding, did you use thick enough cable f...
by thombet
Sat Jun 29, 2019 6:55 am
Forum: Music Tech DIY
Topic: 208p build thread (papz's PCBs)
Replies: 819
Views: 62814

another strange thing is happening couple of post back i reported that the pulser did not trigger my sequencer. so i swapt some resitors arround changed there falues nothing happend. until i discoverd that when i touched the back of the motherboard (see pic for the loction and points that i touched)...
by thombet
Sat Jun 29, 2019 4:44 am
Forum: Music Tech DIY
Topic: 208p build thread (papz's PCBs)
Replies: 819
Views: 62814

okj so i thought the bleeds were gone after the groundhack. but i can still hear osc bleeding into the ouput.

the groundcable does reduce the volume of the bleed however.

strange...

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