Euro dual Teezer?

Cwejman, Livewire, TipTop Audio, Doepfer etc... Get your euro on!

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thermionicjunky
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Post by thermionicjunky » Sun Jul 08, 2012 9:11 am

noise brigade wrote:Shame it dont have lfo mode
The range goes from less than 0.01 Hz to over 30kHz.

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Post by noise brigade » Sun Jul 08, 2012 4:04 pm

thermionicjunky wrote:
noise brigade wrote:Shame it dont have lfo mode
The range goes from less than 0.01 Hz to over 30kHz.
I take that back

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Post by limpmeat » Sun Jul 08, 2012 8:40 pm

So what size are the PCBs for sale on bridechamber?

One of my cabinets is deep, so I can do it.

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Post by sonicwarrior » Mon Jul 09, 2012 1:02 pm

The regular non Eurorack PCB is 143 mm x 115 mm. At least that's what I measured on mine. You can mount the pots on the PCB which means the depth can be ca. 115 mm.
It's not as long as a standard Ken Stone PCB.
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Post by mOBiTh » Mon Jul 09, 2012 1:28 pm

sonicwarrior wrote:The regular non Eurorack PCB is 143 mm x 115 mm. At least that's what I measured on mine. You can mount the pots on the PCB which means the depth can be ca. 115 mm.
It's not as long as a standard Ken Stone PCB.
might make a single one and see what happens

tricky to calibrate apparently

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Post by frozenkore » Mon Jul 09, 2012 2:33 pm

ringstone wrote:
negativspace wrote:May well have to do with the PCB size too, although the originals were too tall to clear the rails in anything other than a 'shelf' configuration
Appears this might be the case, the Bridechamber website warns these are not skiff-friendly at 4.1". Which I do believe looks very close to the width of the 5U PCB. The pots on this panel don't quite match the PCB-mounted pots on those PCBs though, so it could still be a different PCB.

Cheers
Blair
It looks like there are 2x 4.1" boards, however, if they sell the boards separately, which I'm really hoping they do, you could parallel mount them to the panel. If you pack it right, you should be able to get it within 2"? I'm just kind of guessing with my fingers. I don't know off hand how deep a skiff is, but you might be able to pull that off. :hmm:

Oh, and if you can, 4.1" is 20.5hp so you can easily get it behind a 24hp panel which gives you breathing room on the sides. This is just what I've speculated from Scott's site (which doesn't give a lot more detail...).

*Edit: Okay, so it looks like the reason why there are two boards is the module is a dual :doh:. So you should be able to make a skiff friendly version of this, but it will take some wiring.
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Post by sonicwarrior » Mon Jul 09, 2012 2:55 pm

mOBiTh wrote:tricky to calibrate apparently
What? Why?

My MOTM format Teezer is almost finished. I hope I don't get into calibration madness after the wiring madness. :eek:
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Post by mOBiTh » Mon Jul 09, 2012 3:09 pm

frozenkore wrote:
It looks like there are 2x 4.1" boards, however, if they sell the boards separately, which I'm really hoping they do, you could parallel mount them to the panel. If you pack it right, you should be able to get it within 2"? I'm just kind of guessing with my fingers. I don't know off hand how deep a skiff is, but you might be able to pull that off. :hmm:

Oh, and if you can, 4.1" is 20.5hp so you can easily get it behind a 24hp panel which gives you breathing room on the sides. This is just what I've speculated from Scott's site (which doesn't give a lot more detail...).

*Edit: Okay, so it looks like the reason why there are two boards is the module is a dual :doh:. So you should be able to make a skiff friendly version of this, but it will take some wiring.

Hmmn not sure, here's the pcbs that are currently being sold:

http://bridechamber.com/Teezer_PCB.html

Board Size 4.625” x 5.75” which is just for one oscillator.

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Post by Dr. Sketch-n-Etch » Mon Jul 09, 2012 4:06 pm

sonicwarrior wrote:
mOBiTh wrote:tricky to calibrate apparently
What? Why?

My MOTM format Teezer is almost finished. I hope I don't get into calibration madness after the wiring madness. :eek:
I can't speak to the Teezer per se, but the Rubicon definitely has a few extra things to adjust for TZFM over and above a typical VCO, so I wouldn't be surprised.
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Post by mOBiTh » Mon Jul 09, 2012 4:12 pm

Dr. Sketch-n-Etch wrote:
sonicwarrior wrote:
mOBiTh wrote:tricky to calibrate apparently
What? Why?

My MOTM format Teezer is almost finished. I hope I don't get into calibration madness after the wiring madness. :eek:
I can't speak to the Teezer per se, but the Rubicon definitely has a few extra things to adjust for TZFM over and above a typical VCO, so I wouldn't be surprised.
Teezer has 7 or 8 trimpots per oscillator which suggests it will require either some decent instructions or a good understanding of the circuit to pull off well!

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Post by Juxwl » Mon Jul 09, 2012 4:23 pm

mOBiTh wrote:
Dr. Sketch-n-Etch wrote:
sonicwarrior wrote:
mOBiTh wrote:tricky to calibrate apparently
What? Why?

My MOTM format Teezer is almost finished. I hope I don't get into calibration madness after the wiring madness. :eek:
I can't speak to the Teezer per se, but the Rubicon definitely has a few extra things to adjust for TZFM over and above a typical VCO, so I wouldn't be surprised.
Teezer has 7 or 8 trimpots per oscillator which suggests it will require either some decent instructions or a good understanding of the circuit to pull off well!
When I asked Scott about diy options, this is what he said:

"Euro Teezer -- first one is done, testing and trimming. Could do a kit, but it's a big fella and the docs aren't very supportive. If you're interested I can do one. (EDITED out pricing that he hasn't revealed yet) -- everything is flying wires!!!!!!"

So it sounds like a tricky build.

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Post by sonicwarrior » Mon Jul 09, 2012 4:57 pm

mOBiTh wrote:Board Size 4.625” x 5.75” which is just for one oscillator.
That's more or less what I measured. Just not in the metric system.
mOBiTh wrote:Teezer has 7 or 8 trimpots per oscillator which suggests it will require either some decent instructions or a good understanding of the circuit to pull off well!
I'm counting 6 on my already stuffed PCB. There is an optional trimmer that I didn't stuff.
Juxwl wrote:it's a big fella and the docs aren't very supportive.
I can't second that. It's not thaaat big and the docs have been OK so far. There is stuff far worse out there.
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Post by Norman_Phay » Mon Jul 09, 2012 5:30 pm

Yeah I concur, I'm about 3/4 thru stuffing my teezer PCB and it's not that big a stuffing job, at least compared to most of the JH boards I've assembled and the docs are fine! Everything you need is in there.
Last edited by Norman_Phay on Wed Jul 11, 2012 1:02 pm, edited 1 time in total.

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Post by frijitz » Tue Jul 10, 2012 12:55 pm

Just a couple of quick notes on the dual Euro Teezer.

The board is a chopped down version of the original, with board-mounted controls removed, a Euro PS connector added and an additional waveshape trimmer added. The boards are mounted back-to-back perpendicular to the panel to allow access to both sets of trimmers.

All but one of the setup adjustments for the Teezer are easy. They are as follows:
Tuning -- 1V/Oct and HF tracking (standard).
Sine wave -- Offset and shape (standard).
Tri wave -- Offset (standard).
Saw/Tri symmetry -- Two adjustments, easily made while observing the Tri.
Threshold -- Tweaks the core to equalize the up and down ramps. Addresses a minor issue with the core syncing to the modulation source under special conditions. Optional, as the issue is almost never problematic.

Our intent is to mainly sell this as a completed module. A limited number of kits may be made available. Please contact Scott directly if you are a current customer and interested in this option.

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Post by synthcube » Sun Feb 10, 2019 2:40 pm

Nothing like digging up an old thread to announce something newly available :)

After synthCube acquired Bridechamber, it took some time for all of the original bridechamber stock to make its way into our shop. We recently uncovered a box and to our surprise we found the original run of these ian fritz dual teezer VCO PCBs, panels and custom mounting brackets. Only 25 sets were made.

They are available now, on a limited run basis. Feel free to use this thread for comments, questions, build examples, troubleshooting etc. The kits are available in beta format- while we have a couple kits out to trusted builders for verification and fine tuning, the kits as offered are based on the original Ian Fritz and Bridechamber documentation.

ian fritz dual teezer vco euro LIMITED RUN

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Post by sduck » Sun Feb 10, 2019 10:08 pm

Do these boards use the CA3280? Edit: oh, now I see, they do. But i also see you sell them, so I guess that sorts that out. For a while you couldn't get those things anywhere.
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Post by frijitz » Sun Feb 10, 2019 10:41 pm

sduck wrote:Do these boards use the CA3280? Edit: oh, now I see, they do. But i also see you sell them, so I guess that sorts that out. For a while you couldn't get those things anywhere.
Actually, they are being manufactured now by Alpha:
http://www.alfarzpp.lv/eng/sc/AS3280.php
Alex kindly sent me a couple to test, and they looked fine in my usual VCA-like test circuit. :banana:

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C0G caps for Dual Teezer

Post by MuadMusic » Wed Feb 27, 2019 10:21 pm

I recently purchased the Dual Teezer Eurorack boards/panel/bracket from Synthcube. I'm working on a Mouser Project for it. Paying a quarter for a common cap seems a bit high, but the 0.22 uF C0G caps for $1+ each is really killing me. This is particularly the case since I need 24 of them.

So ... my question is "how important is the C0G spec in this project"? Can I get a cheaper cap without sacrificing, say, stability?

Ian, love your modules. Can you please educate me on C0G? Thanks in advance!

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Re: C0G caps for Dual Teezer

Post by frijitz » Wed Feb 27, 2019 11:22 pm

MuadMusic wrote:I recently purchased the Dual Teezer Eurorack boards/panel/bracket from Synthcube. I'm working on a Mouser Project for it. Paying a quarter for a common cap seems a bit high, but the 0.22 uF C0G caps for $1+ each is really killing me. This is particularly the case since I need 24 of them.

So ... my question is "how important is the C0G spec in this project"? Can I get a cheaper cap without sacrificing, say, stability?

Ian, love your modules. Can you please educate me on C0G? Thanks in advance!
The version of the docs I have says plastic or ceramic for the .22’s. Plastic can be PE/mylar. Ceramic would just be inexpensive discs.

Ian

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Post by appliancide » Sat Mar 02, 2019 11:25 am

frijitz wrote:
sduck wrote:Do these boards use the CA3280? Edit: oh, now I see, they do. But i also see you sell them, so I guess that sorts that out. For a while you couldn't get those things anywhere.
Actually, they are being manufactured now by Alpha:
http://www.alfarzpp.lv/eng/sc/AS3280.php
Alex kindly sent me a couple to test, and they looked fine in my usual VCA-like test circuit. :banana:

Ian
This is fantastic news! The Teezer and Threeler are modern classics, plus there a few other great designs with the 3280.

edit: to remove horrible mistake
Last edited by appliancide on Sat Mar 02, 2019 9:03 pm, edited 1 time in total.

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Post by frijitz » Sat Mar 02, 2019 1:02 pm

appliancide wrote: I built this module a little while back. On my PCBs, the 1v/Oct trimmer was not connected to ground, so I had to jumper that connection on both boards.
Could you please elaborate on this? The 1V/Oct trimmer does not connect to ground. There are several versions of this board, so I'm not sure which one you are refering to, but in all the trimmer connects to a 330R resistor (R16). Could you possibly please post a photo showing this particular connection you are talking about?

Thanks!

Ian

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Re: C0G caps for Dual Teezer

Post by MuadMusic » Sat Mar 02, 2019 1:09 pm

frijitz wrote:
MuadMusic wrote:I recently purchased the Dual Teezer Eurorack boards/panel/bracket from Synthcube. I'm working on a Mouser Project for it. Paying a quarter for a common cap seems a bit high, but the 0.22 uF C0G caps for $1+ each is really killing me. This is particularly the case since I need 24 of them.

So ... my question is "how important is the C0G spec in this project"? Can I get a cheaper cap without sacrificing, say, stability?

Ian, love your modules. Can you please educate me on C0G? Thanks in advance!
The version of the docs I have says plastic or ceramic for the .22’s. Plastic can be PE/mylar. Ceramic would just be inexpensive discs.

Ian
Beautiful! That's what I was thinking/hoping! I'll update the Mouser Project with inexpensive 0.22's. (When I get finished with the project I'll post it in the thread).

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Dual Teezer Mouser Project

Post by MuadMusic » Sat Mar 02, 2019 3:35 pm

Here is the Mouser Project
https://www.mouser.com/ProjectManager/P ... 4cd0df60c9

See follow up message for the 15 items in the BOM that are NOT in this project.

Also, note that there are a number of ICs and Trimmers that are available from Tayda Electronics at a lower cost.

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Parts not in the Mouser Project

Post by MuadMusic » Sat Mar 02, 2019 3:37 pm

IM me if you'd like a spreadsheet. Or better still, teach me how to attach or otherwise reference a spreadsheet in the forum.

Line 17 HDW MHNZ3-7H4 Fastener Express M3 x .5mm Hex Nuts Steel Zinc 1 each 8 M3
Line 18 Fastener Express 1 each 4 #4 HDWWSHR#4NYLON
Line 19 801252 4.5 mm OD Hex Standoffs (M-F) / M3-0.5 x 5 mm / Alum
Line 34 PWR CBL1016EURO25 Erthenvar EURO 10-16 PIN POWER CABLE 10 each 2 n/a
Line 38 RES 2KTEMPCO Ankaeohm 2k ohm tempco resistor 3300ppm 2 kOhm 2 R14 n/a
Line 74 22BL-25S Consolidated 22AWG Stranded Hookup Wire 25' Spool Wire Line 74 1 each 1 n/a

Order From Tayda Electronics
Line 29 IC A-857 26 GTK 8 PIN MACHINE TOOLED IC SOCKET 8 pin 26 DIP8
Line 30 IC A-1319 2 GTK 16 PIN MACHINE TOOLED IC SOCKET 16 pin 2 DIP16
Line 31 A-4566 14 various colors available KNB CP-BUA-6-S(6.4)W7E Chia Shin Davies 1900 Clone Black 1 each 14 n/a
Line 32 A-1984 10 100K OHM LINEAR TAPER POTENTIOMETER SOLDER LUGS ROUND SHAFT DIA: 6.35MM 100 kOhm 10 R1, R3, R12, R12A, R120 Line 32 12mm
Line 33 A-1982 4 10K OHM Linear Taper Potentiometer Solder Lugs Round Shaft Dia: 6mm 100 Kohm 4 R8, R10 12mm
Line 68 A-584 2 100 OHM TRIMMER CERMET POTENTIOMETER 25 TURNS 3296W Line 68 A-584 Bourns 100 Ohm 2 R15 3296W
Line 70 A-596 1 500 OHM TRIMMER POTENTIOMETER CERMET 25 TURNS 3296W Line 70 A-596 Alpha 500 Ohm 1 R42 3296W Alpha 500 Ohm 1 R42 3296W

Order from Synthcube
Line 21 IC CA3280 Intersil CA3280 1 each 2 DIP14

Order on Ebay
Line 23 IC SSM2220 Analog Devices SSM2220 SUPERMATCHED TRN PAIR 1 each 2 Q1,Q2 PAIR DIP8
AD SSM2220 DIP-8 AudioDual Natched PNP transistor IC from U-Barn
https://www.ebay.com/itm/401296021739?V ... i&mail=sys

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original BOM

Post by MuadMusic » Sat Mar 02, 2019 4:57 pm

This is the Synthcube link to the BOM with which I started:
file:///C:/Users/MusicMan/Downloads/fritz%20dual%20teezer%20euro%20vco%20BOM%20(2).pdf

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