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
Duration 6h for Mods: 300€ + parts (knobs+housing) + postage (german clients + 19% tax) Stereoping pointed out some interesting mods for this VCR-looking analog drum beast. Since I like the idea of saving kits i focussed on parameters like tune and decay for real-time control. Triggering those 5 voices by my modded TR-606 with multiple outputs. Great fun! Thx for the nice documentation! http://www.stereoping.com/pearl-drx-1-drumsynth/?lang=en The Pearl DRX-1 has 5 Instruments which can be triggered by drum pads. Of course, you can also feed some trigger signals into it. All…read more
Got this earlier version of the RE-201 in a very bad shape. After a lot of hours, it´s alive again. Replaced all pots and connections, recapped the power supply and adjusted the tape transport that caused a lot of issues. thx to Jacob Stoy who borrowed his RE-200 for troubleshooting. check out the „sound on sound“ mod! quite noisy but fun unit!!! https://youtu.be/VJ9MP76cpNM
Ripped from an Top Sound DS organ. Super nice triple bucket brigade chorus…solina style strings!!! using just 1 Roland 100m saw oscillator.
Duration 6h for Mods + OS update: 300€ +Parts (EPROM) and postage (german clients +19%) Modded this little Roland TR-909 together with Claudio of discrete-audio-solutions back in the days. All mods are switchable to „stock“ sound (except clap noise). Mods: -BD-Tune, BD-Overdrive, BD-Decay Range Extension Switch -Clap Noise Volume -Rimshot Pitch variations switch -Hihat Tune Also exchanged the eprom to the latest firmware (V4) with stable MIDI timing. Thanks to curetronic for the steady desoldering-hand:) www.discrete-audio-solutions.com www.curetronic.com http://colinfraser.com/tr909/909mods/909mods.htm
Oberheim Matrix 1000 EPROM chip, operating system version 1.16. The last official version released by Oberheim was 1.11; this version corrects some MIDI SysEx control issues that Oberheim overlooked, such as a really slow response to filter cutoff frequency settings. This replaces chip U804 on the main board (it is socketed, so no soldering is required). Took about 30min. – Bug fixes made by Nordcore. – MIDI NRPN parameters editing fix. – Faster processing of parameter changes that need a modulation matrix rebuild, there’s still a small lag but it’s…read more
This one was suffering from juno cancer on one voice. Uncoating the 80017 chip did partially not work (no resonance). Put a replacement chip on a socket and recalibrated all of the 6 voices. Took 2-3h For the chorus there was used a test-point on the board as input and a new pot was installed for chorus speed. Very useful! 1-2h