Eurofied monotron

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pulplogic
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Eurofied monotron

Post by pulplogic »

I finally put a panel on my Eurofied monotron, so I thought I'd show it off. The inputs are buffered and attenuated and the outputs are brought up to Euro levels. Many props to Tim Stinchcombe for the excellent filter analysis.

http://www.timstinchcombe.co.uk/synth/m ... /mono.html

I replaced the LM324 with a much lower noise UPC4574 and modified the compensation network to something similar to the MS10. The op-amp is now powered from +-12V. I plan on trying an OPA4277 in the filter next since it has a similar gain-bandwidth product (1MHz) as the original, but much lower noise 8nV/rtHz.

Image

Image

Image
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antimatteraudio
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Post by antimatteraudio »

:love: Samples please!
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Hainbach
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Post by Hainbach »

Awesome! :yay: I too would like to hear what you can now squeeze out of the Monotron.
flashheart
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Post by flashheart »

Stunning. What's the panel made from?
I'm not buying a maths though, not my idea of fun...
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Matos
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Post by Matos »

That's amazing. Beautiful work. Looks flawless. It looks how I always dreamed it would, but better. Wish it was mine.
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mateo
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Post by mateo »

flashheart wrote:Stunning. What's the panel made from?
Looks like acrylic to me...
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authorless
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Post by authorless »

Badass. Nice job, sir.
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Tall Midget
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Post by Tall Midget »

Very cool, I was expecting a ribbon controller in the panel though.
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valis
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Post by valis »

Wow very very cool. I'm sure many of us would be interested in as much detail about your process as you'd want to give us!
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Post by Madcap Labs »

:bacon:
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exper
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Re: Eurofied monotron

Post by exper »

pulplogic wrote: Image
It's beautiful! Any plans to make more of these?
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rico loverde
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Post by rico loverde »

damn, that is pretty fucking dope...really nice looking. def gotta post a video of it in action
works for Darkplace Manufacturing
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reignbear
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Post by reignbear »

um...... :omg: :hail: :omg:
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bint
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Post by bint »

woah!
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:sb: :sb: :sb:
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Post by dude »

fuck yeah!
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Post by anselmi »

:mygod:
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mark_snipz
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Post by mark_snipz »

Nice. Very Nice...
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Red Electric Rainbow
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Post by Red Electric Rainbow »

Looks like a quality build.
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jcn7
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Post by jcn7 »

Wow! By any chance would you consider modding other peoples monotrons for profit? I'd sure be interested. Great job!
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phono1337
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Post by phono1337 »

Nice job
:yay:
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Synesthesia
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Post by Synesthesia »

:eek: :hail:
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Tim Stinchcombe
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Re: Eurofied monotron

Post by Tim Stinchcombe »

pulplogic wrote:I finally put a panel on my Eurofied monotron, so I thought I'd show it off. The inputs are buffered and attenuated and the outputs are brought up to Euro levels.
Nice looking job - I particularly like the right-angle headers in the pot holes, to interface the two boards! How similar are the technical details of what you have done to those you posted some while ago? I notice for example that you do not seem to have included an 'audio in' socket?
I replaced the LM324 with a much lower noise UPC4574 and modified the compensation network to something similar to the MS10. The op-amp is now powered from +-12V. I plan on trying an OPA4277 in the filter next since it has a similar gain-bandwidth product (1MHz) as the original, but much lower noise 8nV/rtHz.
From a quick glance at the datasheet, the OPA4277 looks like a good candidate for a simple 'drop in' replacement - might look into this myself (after spending so much time on the filter analysis, I kind of got a little sick of looking at the thing, and put it down in favour of other projects...!). And what's up with the '324 in your photo - looks rather like the top is blown right out of it! :eek:

Tim
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neilbaldwin
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Post by neilbaldwin »

Brilliant!
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Post by Meat Parade »

:hyper:
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