I jut built the Etap2hw kit from Winkel Newtone. Very thoughtfully put together kit, very good service. (Shipping to US $6 and less than a week.)
This is the third SKRM module pedal I have built, I built one for the mono guitar effects module and one for the stereo delay/reverb. Both from the data sheets, on vero. The delay/reverb (R02) is really nice.
When I first received the Etap2hw module I tried it in the other two pedals (impatient to hear it!). It worked but I got a moderately loud "click" after certain notes, with the echoes repeating the clicks. Not necessarily the loudest notes, not near clipping (lLED works), just every few notes an audible click that cycles through the delay line. I posted on another forum and it was suggested that Piet had programmed the module with a certain wrapper in mind... So I ordered the kit and assembled it yesterday.
I still have the exact same problem, a click that follows some notes and cycles through the delay. Any ideas? Could I have harmed the module by putting it into a data sheet circuit for the SKRM modules? Since the other builds sound fine with the other modules, and the problem is the same in the new PCB, I am doubtful that "its my soldering" or something.
I read the available Bulletins on Echotapper, did the suggested mods: removing the 2 100k resistors from the opamp inverting inputs to ground, changing the two feedback loop low pass ceramics to 220p, changing the two resistors that "pad" the inputs of the opamps. Used the suggested method of choosing S and D resistors for the FETs (the alternate values supplied with the kit worked fine.)