[FYI] Behringer FX600 / Coolaudio V1000 effect module

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av500
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[FYI] Behringer FX600 / Coolaudio V1000 effect module

Post by av500 » Thu Sep 03, 2015 3:33 pm

Some time ago I bought a Behringer FX600 to put into a Eurorack module. After playing around with the various effects, I found out I hated all of them except the delay and the pitch shifter. Also there was a zipper noise when turning the effect level pots as each pot change results in a new firmware upload.

I desoldered the control signals from the Atmel microcontroller and put some jumpers to select one of the 16 built-in effects of the Coolaudio V1000 chip. they sound quite OK to me and there is a variety of reverbs which the FX600 did not offer.

The V1000 stock effects have fixed parameters, so the only thing to put on the front panel was a 16 position rotary switch and a dry/wet mix pot. I removed the FETs used for the bypass switching and soldered a blend pot instead. I'm still waiting for the dual pot to arrive, so it's single channel out for the time being.

I brought the input signal down from 5Vpp to ~1Vpp and added a dual opamp to get the output back up to modular level.

The front design is simply laser printed paper which I spray glued to the panel and then added a few coats of clear lacquer to protect it.

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skookum
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Post by skookum » Thu Sep 03, 2015 3:48 pm

Very nice. I have a couple of V1000 sitting in my drawer too, with plans for a slim FX module too. Good work!

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Tombola
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Post by Tombola » Thu Sep 03, 2015 6:02 pm

Great panel

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Post by Jarno » Fri Sep 04, 2015 2:44 am

Indeed, panel turned out great, need to try paperface one of these days. Seems great to be able to have fullcolour frontpanels (if a bit "busy").

Racking such a effect is also a good idea.

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mush
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Post by mush » Fri Sep 04, 2015 2:53 am

mxmxmx has done a very nice conversion of a behringer stombox. See in this thread:
https://www.muffwiggler.com/forum/viewt ... ?p=1728529

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av500
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Post by av500 » Fri Sep 04, 2015 3:01 am

mush wrote:mxmxmx has done a very nice conversion of a behringer stombox. See in this thread:
https://www.muffwiggler.com/forum/viewt ... ?p=1728529
thanks, added the Behringer DD600 to my ebay watch list :)

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okelk
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Post by okelk » Fri Sep 04, 2015 7:30 am

Nice!

I'm searching for a panel mountable 16 position (coded?) rotary switch myself.
which one did you use?

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Post by av500 » Fri Sep 04, 2015 8:13 am

okelk wrote:Nice!

I'm searching for a panel mountable 16 position (coded?) rotary switch myself.
which one did you use?
I knew you'd ask that :)

after failing to find a suitable switch for a decent price I got this one: KMR16

initially I planned to just leave it like that, but the shaft is only 4mm and it's very stiff to turn, so I needed to add a knob. I had some 6.3mm plastic standoff that I drilled 4mm on the inside and superglued it to the shaft. Now 6.35mm/ 1/4" knobs fit nicely. just keep in mind that it's a plastic shaft and treat it gently.

I mounted it like this:

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