EZ1084EQ - NEVE 1084 -

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Floti

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Feb 20, 2013
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128
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Düsseldorf
Hi!! Just wanted to say thanks for this great Project! I finished my stereo set in one of the new Dan´s stereo cases and it sounds amazing! I used a little Sunpowers SMPS as suggested by Dr_J and it works, makes no noise that I can hear by normal use, fits in the case and is also a cheap option. Really happy with it.
 

Bluzzi

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Jun 6, 2004
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Montreal
Floti said:
Hi!! Just wanted to say thanks for this great Project! I finished my stereo set in one of the new Dan´s stereo cases and it sounds amazing! I used a little Sunpowers SMPS as suggested by Dr_J and it works, makes no noise that I can hear by normal use, fits in the case and is also a cheap option. Really happy with it.

You're welcome! Great to hear another baby is born! Twins this time!

Do you have the model of the power supply you used? I am testing some here so I can recommend them. Didn't think of mounting in the case itself but it seems some are reporting OK results. I'll have to test that myself.

Thanks

Cheers

Jim
 

Floti

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Feb 20, 2013
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Düsseldorf
Sure! Mine is this one: https://www.conrad.de/de/acdc-einbaunetzteil-sunpower-sps-035-24-24-vdc-15-a-35-w-510374.html
 

Bluzzi

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Jun 6, 2004
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Floti said:
Sure! Mine is this one: https://www.conrad.de/de/acdc-einbaunetzteil-sunpower-sps-035-24-24-vdc-15-a-35-w-510374.html

OK thanks. Very similar to the one I am testing. Yours is actually a little smaller even.

Cheers

Jim
 

Floti

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Feb 20, 2013
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Düsseldorf
Hi! I also tried this one and works aswell. It´s even cheaper! https://www.conrad.de/de/acdc-netzteilbaustein-geschlossen-mean-well-rs-35-24-24-vdc-15-a-36-w-1297300.html
 

Greg S.

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Sep 11, 2013
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Germany
Please never ever use those switching PSU crap! I did once and had a lot of trouble..
I designed my own PSU-PCB and I got -120dBV Ripple and Noise out of my Box delivering 24VDC(<100kHz)!


 

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weiss

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Jun 16, 2014
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Germany
Floti said:
Hi! I also tried this one and works aswell. It´s even cheaper! https://www.conrad.de/de/acdc-netzteilbaustein-geschlossen-mean-well-rs-35-24-24-vdc-15-a-36-w-1297300.html

Hey Floti, great discovery!!
i'm also gonna build a stereo matched 1084 with added 1290 boards. What front panels did you guys use? can't decide between two 1U or one 2U version...
 

Bonsaimaster

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Apr 17, 2013
Messages
189
Ok I have a problem with one of the boards I built. The unit sends signal with the IRON and BYPASS but with the EQ engaged I have to turn the gain all the way up to barely hear it. Then when I switch back to IRON the unit is loud and distorted. Any ideas. I re soldered everything but no go.

Thanks
 

Colorblind

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Nov 26, 2009
Messages
73
Location
Canada
Hey all,

I built a couple of these units awhile back and I've used them a ton, but have not gotten around to biasing them. I'll be using the standard Pro Tools signal generator to feed a 1k sine wave into the EQ. I've got a B&K 1477 Oscilloscope that I'm going to attempt to use as well.

My question is, where do I connect the oscilloscope to? The build guide says to connect to the EQ output, but the output is a 3-pin XLR, and the oscilloscope is just a single probe. I did some research but haven't found a clear answer yet. Any help would be much appreciated!

C
 

Colorblind

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Nov 26, 2009
Messages
73
Location
Canada
shabtek said:
connect the scope across the output transformer secondary

Ok, so if I understand correctly, the Carnhill 1847's secondary wires are blue, green, black & violet. Do I need to connect the scope to all four, or a pair, or just one?

Thanks,

C
 

Colorblind

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Nov 26, 2009
Messages
73
Location
Canada
Thanks. I bought my scope used and the probes didn’t come with ground clips, which added to my confusion!  Going to track one down.
 

Leesecho

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Jun 25, 2017
Messages
1
Long time reader, first time post... Does anyone know if the ez1084 PCBs will be made available to buy again at some point? Should I reach out to Bluzzi directly? Thanks, and any help is appreciated!
 

zqone537

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Joined
Jan 24, 2010
Messages
244
Hey good folks,
I am having an issue with my 1084 eq and eas hping you could help me out. It has been working great for me just so you know, Absolutely love this eq. So I go to use it the other day and the output is really low. When I have the gain knob cranked all the way up to max. In hard bypass, normal bypass and engaged. Any clues as to what I can do to fix her up? Thanks for all you time.
Zq
 

3nity

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Dec 30, 2005
Messages
3,524
Location
MTL, CANADA
hi ZQ.
How did you achieve hard bypass..the answer lies there...because you are completely bypassing the whole eq and still you got low output.
i would check your signal source as well as check for cold solder spots.
thanks
 

zqone537

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Jan 24, 2010
Messages
244
I'm such a nub! That was exactly it 3nity! Bad channel on the patchbay. Now I can have a pair. I'l be reaching out to you soon bro. Thanks a bunch!
 

fragletrollet

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Sep 19, 2010
Messages
374
Location
Oslo
Came over a cool read:
analog_09.jpg

An example of a system whose controls interact is the Neve 1073. In the 1073, the high- and low-frequency equalization sections are implemented as active filters within the same gain stage. Figure 9 shows the high-frequency responses of the EQ with the low-frequency selector at "Off" (blue), and the same responses with the low-frequency selector at 220 Hz (red). Even though there is no low-frequency boost or cut being applied, the character of the high-shelving filter is influenced by the low-frequency selection. This behavior makes the high-filter more flexible, because different behavior can be coaxed out of it with different settings applied to the low-frequency selector.
I wasn't aware of this! source

Still loving these eq's! Have a couple of 1073 addon eq's for my 1073 line-amps, and as I love the 10k setting on my 1084's, I was interested in finding the cap responsible, so I could try out something closer to the 10k hZ of the 1084 opposed to the 12k on the 1073. Well, looking at the schematic, there is a bit more going on than a simple RC or LC setup! Seems like it's combined with the LF shelf, and I have no clue as to what online filter calculator I should use to find a new cap... and not alter anything else!

In terms of a rerun; would be really cool with a frontpanel design for vertical use, mounting something close to a 19" panel vertically to resemble channel strips on a mixer. Preferrably with the 500 series width! Anyhoo... all the best to you Bluzzi! ✌️
 

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