Archive of the former Yahoo!Groups mailing list: MOTM

Hi all,

I just finished building my first kit, a '410, and it sounds great...
mostly. Sadly the third filter doesn't seem want to play ball.

It passes audio, but it's stuck at the highest setting, up around 30k,
rendering it useless. No cv or knob twiddling makes it budge.

Also - and maybe this is related - the second LFO doesn't produce an
effect on the second or third filter. So basically the LFO switch does
nothing. The first LFO works fine.

I pulled the '410 out of the rack and detached the pcb from the bracket
(sigh) to have a good look, but the soldering looks fine. There don't
appear to be any shorts, unless they are a case of solder from the via
holes (which are all filled) touching the underneath one of the mounted
items, if that's even a concern. Also, I checked the resistors in the
"filter 3 section" of the pcb (so R8, R10, R42, R58, R59) and
everything is in the right spot.

Given that this is the first time I've done soldering work of this
scale since high school, I'm sure it's something I've done wrong, for
example that one of the connections isn't soldered well enough, but I'm
hesitant to just pull everything off the pcb and start again. Do these
problems sound like they can be traced back to specific
resistors/capacitors/etc?

If anyone has any suggestions they would get my infinite gratitude. I'm
really happy with the sound of the unit thus far, now if I can just get
it 100%...

Matthew