MixBuzz500 build/support tHread

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ramshackles

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Dec 18, 2011
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Assuming you have the PCB & metalwork kit:
Guesstimate from working through the BOM; ~£150-200, excl meter, knobs. Remember there are 2 audio boards 2 VCA boards and 1 control board per build (The BOMS detail parts for 1 board of each).
Maybe someone who built one recently can give a better estimate...
 

saxmonster

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Jan 3, 2012
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Looks to be about $220 in parts from mouser,

http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=B077476F23

I never got around to building mine as I was able to get an sb4001 kit.

You might have to go through my cart again.

-Scott
 

100WChris

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i was spending about 450€, but i used only the good stuff :)
definitely worth every cent!
if igor would not paused his career, i would love to build a second unit.
Chris
 

irfrench

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May 21, 2012
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UK
Hi all. 

Can anyone confirm the spacer/stand-off dimensions Igor supplied?

I'm hoping to get some of the Ramshackle offerings but these are PCBs only.

Thanks,
Ian


:)


EDIT!

Thinking about it logically - typically the boards are about 5mm off the normal 'L' bracket, and it is a stereo unit so audio boards will be 1.5 inches apart according to 500/51x mechs.  The remaining standoffs are only useful with Igors metal work.

Problem solved?  Please correct if I'm wrong!


:) ;D ::)
 

ramshackles

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Yes there should be 1.5 inches between each connector on a 51x/500 backplane...
38.1 mm standoff's are not that common however; you might get away with a 38mm one
 

rob_gould

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Sammas said:
Has anyone used DBX 202c gold can VCA's in this project?

I missed this for some reason.  I am also planning too use gold cans.

There's no info on it in this thread, but Igor provides the correct resistor values in the 1RU Mixbuzz thread, so that is what I'm going to follow.

http://groupdiy.com/index.php?topic=41654.msg587347;topicseen#msg587347

Cheers
 

Sammas

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rob_gould said:
Sammas said:
Has anyone used DBX 202c gold can VCA's in this project?

I missed this for some reason.  I am also planning too use gold cans.

There's no info on it in this thread, but Igor provides the correct resistor values in the 1RU Mixbuzz thread, so that is what I'm going to follow.

http://groupdiy.com/index.php?topic=41654.msg587347;topicseen#msg587347

Cheers

Thanks Rob!
 

taliska

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Aug 16, 2013
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Hi all!

So I've had my mix buzz pcbs for a quite a while, and a couple months back I decided to tackle it. Building was straightforward for the most part, but at the time nobody was offering the metal work (Frank's site had a message saying he hadn't received the pcbs yet...). Anyway, undeterred I decided to hack something together myself using a couple of the sleds that Volker & Jeff sell (I had some left over due to deciding not to use them on my studer build ages ago). Anyway, I created an fpd file but was a bit hesitant sending it off as the everything's a bit fixed layout on the mix buzz, so it was either going to be right or a costly mistake! I was also a bit wary of screwing up the hpgl as I'd never done that before.

Anyway, long story short...I got bored of looking at my mix buzz in pieces, so I went ahead and sent off the fpd last week and the panel arrived today. Once I'd checked that it was correctly laid out, I used it to space the two pots that "live on stilts" and then soldered them down. After that, I traced the panel on to the sleds and drilled a lot, dremelled a lot, and q max punched a hole for the meter. After a bit of man-handling things seemed to fit and so now all I have to do is to go through the final stage of assembly and tests at some point, but I'm stoked to be almost done with it.

Anyway, without further ado, here's a pic. I'm posting the fpd file later as that's pretty much the only capacity I'm able to contribute in at the moment... ;)

Cheers,

Kaz
 

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taliska

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Ok, as promised here's my fpd file.

Things to note:

- The holes are all good and in the correct location, so it's a good starting point even if you don't want to use my hpgl.
- There isn't a rectangular cut out for leds above the meter as they're not needed for the hairball meter.
- There are lots of 3mm holes for putting hex bolts in. That's because I wanted to make sure it was going to be sturdy given that my sled is actually two single width sleds combined. In the end I didn't end up using them all (specifically the ones in the middle between the attack and release labels), so you can remove the ones you don't want. It's also worth moving the two hex bolt holes at the bottom about 5mm higher, as they are almost off the edge of the sleds in my version.

Anyway, there you go. I hope this helps someone out, though as always, it's up to you to make sure that the fpd is correct for your use before you send it off for fabrication. Use at your own risk.

Cheers,

Kaz

P.S. Don't forget to rename file from .txt to .fpd before using.
 

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taliska

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So finally plugged in, tested, and put my mix buzz in to my rack! A picture's attached for the sake of audio porn.

When I built this, I installed most of the trimmers, as I had them to hand rather than the fixed resistors. Unfortunately that means that there's a slight lack on info on how to calibrate them, but all in all, things seems to be working ok with a minimal calibration. Adjusted for 0 dc offset for side chain part of 5532 (pin1) using sym trimmer in the side chain section. Adjusted for 0 dc offset for audio part of 5532 (pin 7). Of course, Igor doesn't mention what level of signal to do that with and what to have the controls set to, so I freestyled it / half followed the debug stuff on page 12.

Anyway, seems to be working well when I put some drums through it. Only bit I'm not happy with is the long bundled up ribbon cables that will need shortening at some point, but were purposely kept long for testing.

Very straightforward build for the most part and can highly recommend it, though I made it harder for myself by lifting some traces accidentally when I built one of the audio boards, so had to do a few point to point connections to restore the circuit.

All's well that ends well! ;)

Kaz
 

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wilson.joshd

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Sep 14, 2014
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Calgary, Canada
I know this is a fairly old thread but I'm really keen to do this build so hopefully someone can help me out. I've had a lot of trouble finding where I can order this from.

Thanks in advance for any help you can give!

Josh
 

rob_gould

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The PCBs are available from ramshackle recording. The front panel someone posted an fpd file for a few posts ago. In terms of the cage, I think you're own your own I'm afraid
 

Vac11

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Does anyone have current and complete BOM from farnell.com? From whom you buy parts?

Thank you for your help!
 

rob_gould

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Vac11 said:
Does anyone have current and complete BOM from farnell.com? From whom you buy parts?

Thank you for your help!

Farnell has pretty much everything for this project.  I ordered the parts across several orders and some things like resistors I had already so I don't have a complete BOM.  Igor gives Farnell order codes for most items on the first page of this thread though so you should not have any problem with ordering the wrong parts.  Please post if you are unsure about anything and I will assist.

One item I know is now discontinued at Farnell is the meter.  I think you'll need an alternative source for this.
 

Vac11

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Thanks for replay. I'm an absolute beginner....

1st page of this thread shows me:

"For now, please download docs and BOM!!!!

http://twin-x.com/groupdiy/thumbnails.php?album=405"

When I click on the link it reports me fatal error... :(
 

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