[Shipping] - Euro Panel/Kit for Serge Resonant EQ Mk. II

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Waz
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Post by Waz » Tue Jul 21, 2015 5:48 pm

Ahh so one pin over to the right?

Thanks man for your help! You've gotten me out of so many binds.

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negativspace
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Post by negativspace » Wed Jul 22, 2015 5:58 pm

Correct! (And of course you're welcome... always happy to help.)

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noisefor
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Post by noisefor » Wed Aug 26, 2015 1:30 am

Finally got one of two done. Works like a charm! Thanks to all for the tips/support and to everyone who helped make it happen! Wiring takes patience, but pays off in the end!

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neon
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Post by neon » Sun Sep 06, 2015 1:16 pm

Just finished my first one of two! Very, very fun. I did notice that the signal from the main output/all out jacks was quite a bit quieter than that coming from the individual outs or the upper/lower comb outs. To solve this, I swapped the two resistors that are acting as a mixer between pins 1 and 7 of U5 and pin 2 of U7 - they're mark as 47k on the board, but I replaced them with 330R, and now the all out level matches the other outputs, at least to my ear. Haven't checked on the scope to see if the levels are an exact match or if this introduces ridiculous clipping or anything, but it seems fine to me... if anyone sees why this modification should not take place, speak now or forever hold your peace :eek:

Edit: nnnnnnope, that didn't work out to well - just causes the input of the mixer-amp in U7 to get totally clipped. OK for feedback patches, but renders the thing main out pretty much useless for "normal" EQ purposes. Does anyone have any suggestions for upping the gain on the all-out outputs? Maybe if the mix resistors were a lower value and the feedback resistor was dropped to match, so that the U7 mixer was still at unity gain? I'm really flailing around in the dark here :deadbanana: :deadbanana: :deadbanana:
Last edited by neon on Thu Oct 08, 2015 7:57 pm, edited 2 times in total.
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currently building: Barton Voltage to Rhythm, x0x Heart, 4x Synthrotek/MST Dual VCA, 2x Synthrotek/MST Noise/SH

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Thonk Support
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Post by Thonk Support » Sat Oct 03, 2015 6:33 am

I found a spare Serge Resonant EQ Mk. II panel if anyone needs one... I don't have the CGS or Panel PCBs though. email me on info@thonk.co.uk
Thonk - CLICK HERE - Modular Synth DIY + Eurorack Accessories Store

AS of October 2020 this account which used to go by the name of Monobass is now manned by various staff at Thonk.

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PWM
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Post by PWM » Sat Oct 03, 2015 7:26 am

I won't need the panel, but I am interested in the width measurement. ;)

Jop
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Post by Jop » Mon Nov 02, 2015 2:21 pm

Just finished mine with cheap ceramics, and I must say I like what I hear. I'm happy to put some audio through it for a comparison with someone else polystyrene build.

For the (red) led limiting resistors I have used 7,5K in combination with the Bourns sliders (PTL45-15R1-503B2). Sadly burned one when testing, so if someone has a spare red led (3x4mm) I'm happy to hear :)

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FetidEye
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Post by FetidEye » Mon Nov 02, 2015 4:28 pm

i have a led for you
ik stop 'm wel in een envelop :)

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negativspace
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Post by negativspace » Mon Nov 02, 2015 8:03 pm

PWM wrote:I won't need the panel, but I am interested in the width measurement. ;)
It's 32hp. Technically you could get away with 30hp but the CGS board is 6" long so you're stuck there. (30hp = 5.998" = close enough; file PCB edges if necessary.)

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PWM
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Post by PWM » Tue Nov 03, 2015 3:30 am

Thanks Negative Space!

Are these still avalible? The thread name suggests they are but they're sold out at Thonk for a while now.

Jop
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Post by Jop » Tue Nov 03, 2015 6:06 am


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PWM
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Post by PWM » Tue Nov 03, 2015 7:58 am

Thanks a bunch, Jop!

orasund
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Post by orasund » Sun Nov 22, 2015 12:28 pm

Apologies if i missed this somewhere in the thread - but with latest version, where does the power section [Z W X] of the daughter board connect to the main board? Or is it now connected as part of the row of labeled connections on the edge of the daughter board?

Thanks!

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phidelity
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Post by phidelity » Mon Jan 18, 2016 6:57 pm

I picked up the Res EQ a while back and am having some troubles with the individual outs on the 61Hz, 1.5, 2.8, 5.2, and 11kHz. I get nothing out of their respective jacks. I've double checked for the appropriate connection/solder points and reflowed the solder connections but still nothing. All I get is a little 'pop'.

I've also checked the orientation of the jack and it's correct.

Any suggestions where my issue might be?

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spotta
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Post by spotta » Mon Feb 01, 2016 11:11 am

Finished mine, but unlike my mk1 this has issues!
Currently getting a nasty white noise/feedback scream out of every single output!
I've checked and double checked everything but I must be missing something.
Hopefully some more eyes might be able to see something i've missed?

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Spotta
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PWM
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Post by PWM » Wed Feb 10, 2016 11:45 am

I powerd up the doughterboard yesterday to check which resistor valeu I want to use for LED brightness, but it seems I have a problem.
V+ is shorted to ground.. :confused: I've installed all components minus the jack sockets, input attenuation pots and current limiting resistors.

Two questions:
1) Did anybody else encounter this specific problem?
2) does one blow up a TL074 if V+ is shorted to ground (for less then 2 seconds)? I can't recall ever doing this before..


I looked over the board a thousand times, but, for the life of me, I can't find anything..!

Thanks in advance!

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PWM
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Post by PWM » Fri Feb 12, 2016 11:58 am

Bump.. :help:

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spotta
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Post by spotta » Fri Feb 12, 2016 12:34 pm

PWM wrote:Bump.. :help:
+1 :hmm:
Spotta
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flab
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Post by flab » Sun Feb 14, 2016 5:39 am

I have one of those , and i would love to get another one, any chance will be another run, maybe only the control pcb, not even a panel needed here.

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PWM
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Post by PWM » Tue Feb 16, 2016 5:35 am

Fixed! The problem was a fault on the panel PCB..

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spotta
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Post by spotta » Tue Feb 16, 2016 6:17 pm

PWM wrote:Fixed! The problem was a fault on the panel PCB..
A fault on the actual PCB or with the build?
Spotta
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PWM
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Post by PWM » Wed Feb 17, 2016 9:40 am

spotta wrote:
PWM wrote:Fixed! The problem was a fault on the panel PCB..
A fault on the actual PCB or with the build?

The actual PCB. The +V pad that supplies the CGS PCB was connected to ground..
These things happen. Always check a PCB on manufacturing mistakes before populating.

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spacenoodle
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Post by spacenoodle » Mon Mar 07, 2016 10:45 pm

Mine is late to the party but it looks so cute in a mini case I can hardly stand it.

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PWM
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Post by PWM » Tue Mar 08, 2016 3:11 am

That's one sexy rainbow EQ!

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Jonachi
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Post by Jonachi » Mon Aug 15, 2016 3:15 am

Is this still available somewhere?

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