it says EH5100 D on the circuit board, and the lines are more edgy than those on pictures posted in this thread before. I would like to perform the same volume drop mod, but I'm unsure where to solder the proper parts. I'm no electrical engineer, but I know how to solder. I already have an 0,22uF capacitor and 10K resistor.
if there's anyone who could possibly give me a hint I would be very grateful.
Differences with the other 18V units I've seen:
- no buffered bypass
- BIAS / feedback part different
Weird thing: the knobs are folded around the back of the PCB; as they use these EHX potmeters (w/ the half circle shafts) the knob's rotation is completely wrong
Bernardduur wrote:
Weird thing: the knobs are folded around the back of the PCB; as they use these EHX potmeters (w/ the half circle shafts) the knob's rotation is completely wrong
I would like to build a 9V version but I'm a little bit confused. I already have several schematics and a PCB drawing but I'm not sure they're faithfull to the original. Can samebody help me out?
the schematic than is around the web is almost accurate, the only difference is some more caps on the board, all doing some filtering on power and the clock/LFO sections. The main audio path is as drawn on the schematic.
at the moment i only have guts pics from the trace side.
Is it true that SAD1024A is now out of production and unavailable from any regular supplier? If so, how can we replace it to build a clone of the 9V EH-EM?
JRM wrote:Is it true that SAD1024A is now out of production and unavailable from any regular supplier? If so, how can we replace it to build a clone of the 9V EH-EM?
Yes, the SAD1024 has been out of production for quite a while now.
There's info over at the DIY forum to make it with an MN3007.