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Manhattan Analog 'Mix' - Build Thread
MUFF WIGGLER Forum Index -> Music Tech DIY Goto page 1, 2, 3, 4  Next [all]
Author Manhattan Analog 'Mix' - Build Thread
Monobass
Kit - http://www.thonk.co.uk/shop/manalog-mix-kit/

Build Docs - http://www.thonk.co.uk/Documents/MA/MA_Mix_Kit_Instructions_v1.0.pdf

renasent
thumbs up
Monobass
Here we go, build doc - http://www.thonk.co.uk/Documents/MA/MA_Mix_Kit_Instructions_v1.0.pdf

I advise reading this in Adobe Reader, OSX Preview or similar, browser based PDF viewers can sometimes be unreliable.
rockwoofstone
Just finished building my 3 kits, and all have the output pot acting as an attenuverter, rather than just attenuator. Not what I was expecting - is that expected behaviour, or have I managed to make the same build error on all 3?
Monobass
Ah yeah you just need to change the jumper to UP instead of BP, I should have mentioned that in the build docs.
rockwoofstone
Understood - thanks!
sync24
mine are not doing what they should.
i switched the grounding around, now they both hum.
also, one of the mixers seems to cut off below a certain frequency range.
i checked the jumper is on UP, it is.
my soldering isn't usually a problem...
so, i don't get it.
seriously, i just don't get it
Monobass
Post some pics duff, or bring them over smile
sync24
cheers boss, they do look ok.
one now seems to be doing ok, the other, though, still has the cut-off issue...
i'll have a bit more of a poke about but might be round soon-ish thumbs up
Monobass
I've had weird frequency loss things where I've got a short somewhere in the past, not on the Mix... But then I don't have an experience of them going wrong smile
crossinger
Ok, I finished the 2nd module (after AT-AT-AT last weekend). But this time only with partly luck. waah

Nothing hums and I didn't fry anything. But 1st channel refuses to work. I checked the solderings with my multimeter beep and everything seems fine: from the jacks over the pots and the resistor in the array to the chip. Everytime I got a beep. Now I'm lost seriously, i just don't get it Where can I check the further signal path on the PCB or is it better to attach a signal now for debugging?

Thanks for any advice!

EDIT: Request withdrawn! After another debug session and cleaning the PCB with a special brush, everything seems fine now (fingers crossed). I hope, this is not a cold solder joint.

Finally: thumbs up
Monobass
Good move, sounds like you probably just had a short caused by a solder bridge somewhere, they can be thinner than hair and have a tendency to camouflage themselves.

Next port of call would have been a wiring error, it doesn't matter how much build experience you have, wiring errors are very common.
negativspace
With this module there is very little that happens before the channels are summed - so if there's ever a build issue that effects only one channel you need to look at the jack, pot, input resistor or wire. Anything past that will effect all 3 channels.
Funky40
Monobass wrote:
Kit - http://www.thonk.co.uk/shop/manalog-mix-kit/



when do you expect to get mix back in stock ? so +- weeks
wanted to order some days ago.......need
Monobass
Funky40 wrote:
Monobass wrote:
Kit - http://www.thonk.co.uk/shop/manalog-mix-kit/



when do you expect to get mix back in stock ? so +- weeks
wanted to order some days ago.......need


I will restock it at some point, but not within the next two months. Negativspace has PCBs and panels in stock though I think.
Monobass
Funky40 wrote:
Monobass wrote:
Kit - http://www.thonk.co.uk/shop/manalog-mix-kit/



when do you expect to get mix back in stock ? so +- weeks
wanted to order some days ago.......need


I will restock it at some point, but not within the next two months. Negativspace has PCBs and panels in stock though I think.
joshuagoran
Funky40 wrote:
Monobass wrote:
Kit - http://www.thonk.co.uk/shop/manalog-mix-kit/



when do you expect to get mix back in stock ? so +- weeks
wanted to order some days ago.......need


Synthcube definitely has PCB/panel combos!

I just ordered one a few weeks ago. It's motherfucking bacon yo
synthcube
Not nearly as nice as thonk's kit, but at least it's a start

http://synthcube.com/cart/index.php?route=product/product&filter_name= Mix&product_id=212
jules
If anyone's got a couple of PCBs, I'll be glad to buy them.
joshuagoran
SmallBear is out of 50k audio taper pots...anyone have another US source or a tip on whether another value will work equally well?
Monobass
With smallbear and banzai being the only stockists for these you have to cast your net further afield often .. In stock in Germany

http://www.banzaimusic.com/Alpha-9-PC-NUT-50k-log.html

The wait for restock on these can be months at a time
negativspace
According to my last status-check, the 50K audio should be back in stock any day now. Waitin' on the boat...
makers
synthcube wrote:
Not nearly as nice as thonk's kit, but at least it's a start

http://synthcube.com/cart/index.php?route=product/product&filter_name= Mix&product_id=212


Is there a BOM for this PCB? I've probably not looked hard enough and I know it's only a handful of parts.
Cablebasher
Yes, I too would like a BOM/

In fact, has anyone got a link to a shopping cart with all the components in it?

Or indeed a link to the best online store (i am UK based) to buy the bits from.

This will be my first project not from a kit with all parts and I am a little weary of ordering the wrong bits.

Thanks muchly.
negativspace
I kinda hate to take the lazy way out... but if you check the Thonk instruction .pdf there is a BOM on the second page. (hides)

(Steve's a superhero!)
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