Jacob Korn

Mods & repairs

Posted by in mods & repairs

If you are interested in modifications of your analog gear or you want to control your 70’s and early 80’s machine with MIDI it might be possible to put a retrofit into it. check out the list of possible upgrades and videos of my midified and heavily modified analog synths and drum machines. I am a graduate engineer for media technology (Dipl. Ing.). Please ask for pricing of your individual project. CONTACT kits for the following manufacturers are available: ROLAND, MOOG, YAMAHA, ARP, KORG, KAWAI, CASIO, SEQUENTIAL CIRCUITS, OCTAVE, OBERHEIM, JEN, SOLINA, LINN,…read more

E-MU SP-12 turbo mod+repair

Posted by in mods & repairs, News

Got this iconic beat machine in town fora fair price. Battery needed a replacement and all of the 30 push buttons were cleaned with isopropanol. Fader 8 is still flakey. After that i experimented with the ssm2044 chip and came up with an external control box for both of thi filters. Cutoff 1,2 Reso 1,2 Env. Depth 1,2

Roland TR-808 mod/repair

Posted by in mods & repairs, News

After decades i was able to aquire this gem in my hometown. Switchboard and transistors on the mainboard for driving LEDs were faulty and some switches needed a replacement. I decided to modify it non destructive as possible with the following mods i did to the RC-808 and the yocto clone alteady. BD tune SD tune, snappy decay CL/Rim tune CP reverb Noise level Metal noise overdrive Metal tune Noise/Metal Hat switch OH CH choke off switch CYM short decay switch I made the same Mod for my friend Break…read more

Studer A820 serial control (Max/MSP, Ableton)

Posted by in mods & repairs, News

Studer A820 controlled by serial remote controller, resoldered 9pin cable (different studer pinout) to a usb-serial converter directly to Max/MSP (M4L) in Ableton Live. Now it reads the timer, but i will add some more functionality like biasing other audio parameters  as well:) its unbelievable how future proof the whole design in the mid 80´s already was!!! What drove me crazy (together with Deborah and Daniel as well, thx for your help my friends!) was that Studer did not really document their special pinout for the serial connector. more info…read more

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Jacob Korn EB Slices Tech Talk

Posted by in Education, mods & repairs, News, Studio, Videos

Jacob Korn takes Telekom Electronic Beats TV into his studio for a Tech Talk with a difference. Watch as Jacob demystifies the seemingly complex world of modifying synthesisers and drum machines. In addition, to Korn’s wisdom, you will also hear 2 demos of what a few modifications can do to your gear, be it Roland, Yamaha or any other brand. Check out www.jacobkorn.de/studio for more infos on mentioned projects!

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Danelectro Spring King mod

Posted by in equipment, mods & repairs, Studio

The Danelectro Spring King is a small spring reverb, but there’s also a slapback delay in it, using a PT2399S chip. Thanks to some documentation on the internet I could easily mod the reverb to control the delay. The idea is to be able to get only the reverb signal if we want, and in a general way to take advantage of the delay by changing the Time and Feedback as we feel.Control Delay Time: Between PIN6 (VCO) and Ground, there’s a CMS resistor „362“ (3,6k). Once it’s taken off…read more

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