thinking of doing this...

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qu.one
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thinking of doing this...

Post by qu.one » Tue Feb 23, 2010 1:03 am

i might do this to pop my DIY cherry (at some point):

question is: will it work? 8hp euro. graphic design is prob not final - laid it out quickly. pcb would obv be bracket mounted.

<new image below>
Last edited by qu.one on Mon Mar 01, 2010 8:44 am, edited 1 time in total.

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Post by mmm » Tue Feb 23, 2010 1:12 am

:yay:

Looks great!

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Post by qu.one » Tue Feb 23, 2010 8:33 am

Thanks! Another question: are there any mods that could be done? Like adding a potentiometer that will be able to mix lp/hp and have an additional output jack? Basically a notch I guess. Or adding a 2nd cv for resonance?

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Post by BananaPlug » Tue Feb 23, 2010 9:14 am

I've got a rough sketch of a 1.5" wide frac version of this and the filter should be here soon. It will be a denser, possibly having an input level control and a 2nd CV in. Once I'm sure the layout and features are going to work I'll ask you to make me an acrylic panel for it.

There's these simple little vactrol PCBs which should be about 1 Meg when the vactrol is off. It might be worth trying that as a feedback path to implement a quick and dirty VC resonance. Maybe somebody who has played with them will comment.

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Post by mmm » Tue Feb 23, 2010 10:20 am

qu.one wrote:Thanks! Another question: are there any mods that could be done? Like adding a potentiometer that will be able to mix lp/hp and have an additional output jack? Basically a notch I guess. Or adding a 2nd cv for resonance?
You could put the HP on one leg of a pot and the LP on another and take the "Notch" signal from the wiper.

You could also run the red wire from CF2A (pin 1) that goes to the top of the resonance pot into a VCA input and run the white wire from CF2A (Pin 2) that goes to the wiper of the resonance pot to the output of the VCA. As long as the VCA provides unity gain at full CV, it will work as a VC resonance.

You're just working the feedback loop at that point. Which is all that the pot does. No need for a vactrol.

:mmm:

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Post by qu.one » Tue Feb 23, 2010 10:32 am

mmm wrote:
qu.one wrote:Thanks! Another question: are there any mods that could be done? Like adding a potentiometer that will be able to mix lp/hp and have an additional output jack? Basically a notch I guess. Or adding a 2nd cv for resonance?
You could put the HP on one leg of a pot and the LP on another and take the "Notch" signal from the wiper.

You could also run the red wire from CF2A (pin 1) that goes to the top of the resonance pot into a VCA input and run the white wire from CF2A (Pin 2) that goes to the wiper of the resonance pot to the output of the VCA. As long as the VCA provides unity gain at full CV, it will work as a VC resonance.

You're just working the feedback loop at that point. Which is all that the pot does. No need for a vactrol.

:mmm:
Love it - now a panel redesign is in order!

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Post by qu.one » Sun Feb 28, 2010 10:24 pm

Revised panels attached... 6HP. Hoping to squeeze them to this width.

Image Image

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Post by mmm » Mon Mar 01, 2010 1:59 am

IDK,

They look great! but, huge.

Then again, I have a 23" monitor :hihi: :despair: :bang:

Couldn't resist. 8_)

G

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Post by Henfield » Mon Mar 01, 2010 5:09 am

How about designing some 5U faceplates in Dotcom format?

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Post by qu.one » Mon Mar 01, 2010 6:53 am

Henfield wrote:How about designing some 5U faceplates in Dotcom format?
that could happen - but I guess it might have to be specific to mounting hardware.

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Post by Henfield » Mon Mar 01, 2010 10:28 am

The PCB could be bracket mounted for 5U as well, using the pots to secure the bracket, or screw holes could be drilled for the self tapping right angle brackets that George can supply.

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Post by mmm » Mon Mar 01, 2010 10:43 am

Henfield wrote:The PCB could be bracket mounted for 5U as well, using the pots to secure the bracket, or screw holes could be drilled for the self tapping right angle brackets that George can supply.
They're not even self-tapping.

They're threaded for a 4-40 thread

:mmm:

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Post by qu.one » Mon Mar 01, 2010 10:49 am

yeah - i meant specific to the hardware used for jacks/pots. I dont think mmm offers 5U parts. once I get mine done, i can look into doing this for you in 5U... thanks for the compliment Image

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Post by mmm » Mon Mar 01, 2010 1:51 pm

No, I don't have 5U parts in stock. The pots don't matter and the LED's just stuff in a 1/4" hole, switch styles are up to the individual taste.

Here's a 5U EG I threw together just to show it could be done. I don't have any sort of cabinet to mount it in but, it makes a good example.

Image

:mmm:

OK, I have 2 pix of the front, I don't know how to work these pic uploads :deadbanana:
You do not have the required permissions to view the files attached to this post.

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Post by qu.one » Mon Mar 01, 2010 2:20 pm

George: just want to make sure these knobs will work with the pots:

looking at:

http://www.onlinecomponents.com/buy/AMP ... 1437624-3/
&
http://www.onlinecomponents.com/buy/ALC ... PKG40B1-8/

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Post by mmm » Mon Mar 01, 2010 2:49 pm

qu.one wrote:George: just want to make sure these knobs will work with the pots:

looking at:

http://www.onlinecomponents.com/buy/AMP ... 1437624-3/
&
http://www.onlinecomponents.com/buy/ALC ... PKG40B1-8/
My pots? They'll fit over the shaft but, they're a bit short. I ordered mine with longer shafts so I could put the cover on it and still let people manipuate them without needing tweezers.

Mine have the standard splined shaft, F(oh) and Harvestman knobs fit them even though they sit a tad bit high off the panel.

My bushings are 7mm. I received double mounting nuts so I could use one for a back adjustment (like they do with switches) My shafts are 13mm from the bushing to the tip.

I just grabbed the knobs on the pictures from Radio shack's knob drawer. They're the 3/4" knurled knobs. They sit high off the panel as well. The 1" work well but, 1" knobs covered my hash marks :sadbanana:

It was good enough to get pix :)


:mmm:

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Post by qu.one » Mon Mar 01, 2010 3:49 pm

^^^ thank you sir...

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Post by mmm » Mon Mar 01, 2010 5:06 pm

qu.one wrote:^^^ thank you sir...
You're welcome. Did it help?

PS, without sounding weird, I put two nuts each in your bag. :hmm:

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Post by computer controlled » Mon Mar 01, 2010 8:59 pm

:woah:
Stuff: SH-01A . TR-8S . MX-1 . D-20 . Waldorf MicroQ - Waldorf Microwave II . Ensoniq EPS 16+ . Yamaha MODX6 . Yamaha DX7 . MPC Live . Avalon BassLine . Behringer Neutron . Behringer MS-101 . Behringer Pro-1 . Behringer K-2 . Behringer TD-3 . E-Mu Emax . BeatStep Pro . Keystep .

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Post by qu.one » Mon Mar 01, 2010 10:56 pm

mmm wrote:
You're welcome. Did it help?
It will in the final decision making for knobs.
mmm wrote:PS, without sounding weird, I put two nuts each in your bag. :hmm:
they always come in pairs.

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Post by essex sound lab » Mon Mar 01, 2010 11:08 pm

qu.one wrote:
they always come in pairs.
I'm having a Woody Allen flashback.

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Post by Jason Brock » Sat Apr 24, 2010 6:38 pm

qu.one wrote:Revised panels attached... 6HP. Hoping to squeeze them to this width.
Looks good, but the 3 jacks in a row at the bottom are probably going to be tight. Even if you fit the jacks in, remember that most cables have bulk around them and you need to leave room to plug them in beside one another.

Keep us updated, I'd like to see the finished thing. :nana:
I'm thinking about taking the MMM filter and doing a 5U dotcom panel. Just thinking about options at the moment. I have some Euro but I'd like to move over to 5U instead.

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