[saxmonster]

Well I took a chance and plugged in my IC's.  I was able to test all the filter channels and set them to zero and was able to do all the other calibrations perfectly.  Was pretty easy and was the funniest part.  Everything is working great, no hums, all knobs work as well as switches, etc.  This was my 6th or 7th project I built and I am really having a blast building these projects.  This was a fun one except for the knobs.  These things are a pain in the ass.  I have lifted the little knobs almost to the edge of the bigger knobs cause some of them for what ever reason are rubbing on the larger knobs causing the larger knobs to spin when they are already set,  I think I remember somebody giving some tips on getting the knobs setup properly I will just have to revisit the thread later on. 

[jensenmann]

Congrats! Pictures, or it didn´t happen 

[saxmonster]

Congrats! Pictures, or it didn´t happen 

Added a pic, lol.

[ncl|usl]

hello everyone
i would love to build one of this beautiful eq
where can i find the pcb and parts?
thanks
nick

[kante1603]

hello everyone
i would love to build one of this beautiful eq
where can i find the pcb and parts?
thanks
nick

Welcome to the forum Nick,


here we go:


http://www.thedonclassics.com/#all-kits


Have fun,


Udo,

[EarthTone]

If you just build a pair of these in stock form with +/- 12db and normal non-stepped pots, can you get away with using them in your mastering chain? I'm really wanting a pair, but they'll go into my 2-bus chain for mastering... Can you get away with it as-is? I'd rather build a pair without tweaking the design first before changing anything... But should I build them for +/- 6db if I'm planning to use them only on 2-bus? Just looking for opinions from people who have built them here already... Thanks!

ET

[benewell]

If you just build a pair of these in stock form with +/- 12db and normal non-stepped pots, can you get away with using them in your mastering chain? I'm really wanting a pair, but they'll go into my 2-bus chain for mastering... Can you get away with it as-is? I'd rather build a pair without tweaking the design first before changing anything... But should I build them for +/- 6db if I'm planning to use them only on 2-bus? Just looking for opinions from people who have built them here already... Thanks!

ET

Hi Earthtone,
Currently using mine for mastering with +/-6db, and the non stepped pots. Absolutely love it. You most certainly can get away "as-Is" however, you won't have much wiggle room for minute adjustments. Even when I first tried +/-12 to start I wasn't using more than 4db or so during a mix. A little really went a long way.

I am tempted to try adding stepped pots in a different enclosure... but I'm so happy with the non stepped version that I don't foresee myself investing in that adjustment for a while.

Best,
Brian

[Rogy]

You can make the single bands‘ gain/cut switchable between say +/- 6 or +/- 12dB,it is just one resistor per band.

Udo.

Hello Udo, Could you explain this in a little more detail?

[Ah, found it on Pg14, post 276: @qmp audio - Yes +-6dB is possible..  easiest way on this unit would probably be to swap out all the R69s for 51k..  ]

I have four of these EQ's, and I'm super happy with them (using them for live sound work like you), but would love to limit their gain to +/-6dB per band for finer resolution on the gain pots.

Many thanks!

Best,
Rogy

[AlexSwan]

http://www.thedonclassics.com/250eq-diy.html it is still available? I can place ordere? )

Does anyone know maybe there is a rack version?

Is it possible to buy two kit's and make the rack version yourself? Got instructions?

Thank' you very much all, who help )

Sorry for english)

[AlexSwan]

I finished my equalizers. Packed in 2u rack case. The sound is amazing, very transparent, tasty, smooth, very happy with the sound. Many thanks to David for making such a project publicly available.

I compared opa134 and DOA. Opa134 is more detailed and crisp, a bit cold. DOA is nicer, warmer, it smooths the sound nicely, but the detail blurs a bit, making the sound more natural. As a result, I left DOA and went along the path C. If you need greater clarity, then it is better to leave opa134. In any case, both options are simply gorgeous.

I wonder if it is possible to replace tl071, and NE5534 with OPA134, and does that make sense? Has anyone already tried it?

Also, my left and right channels are a little out of balance at about 0.4db, is this normal? I can adjust the same balance either on the equalizer or on the bypass.


Ideally, I would like to add an output volume control) Can anyone know where to insert it in the circuit?


And once again many thanks to David) He is a very nice guy, he helped me answer my questions.

In general, the project is not complicated and worth it

[saxmonster]

I have had mine built for a while now, just curious as to how you guys are dealing with the smaller Q knob rubbing against the bigger HZ knob under it.  When they are both in the middle they are good but if I turn the frequency all the way to the left or right and change the Q knob they rub.  How are you guys dealing with this?  Do I sand or cut the Q knob a bit?

Thanks
-Scott

[Ricardus]

What's the status of this as far as boards and such?

[saxmonster]

Seems to be in stock

http://www.thedonclassics.com/250eq-diy.html

[PhilipMarlowe]

Hey guys,
thanks so much for this kit Don, and thanks to this awesome community!

I just finished building my first one. Apart from some minor mistakes it worked well, or so I thought. Unfortunately the high band doesn't seem to do anything. All other bands work fine (and sound amazing!) but for some reason the top band doesn't. 
Edit: found a missing solder point for the gain knobs 
Thanks guys!

[PhilipMarlowe]

Another Quick question: what does ccomp4 and ccomp 5 do exactly? Are they needed only with a DOA in place?
Here's my current build. Second one coming soon

[Beeswax]

Yes, I'm also stumpted about Ccomp 4/5 for "power amp".  Also, why five each of the 75K resistors for R34/R35?