Interested in Tau Pipe Phaser / Flanger boards ?

funkyfarm · Posted: Mon Mar 17, 2008 9:04 am Post subject:

Coool !

And don't get furious...but this was just a question ! Very Happy

jhaible · Posted: Mon Mar 17, 2008 12:12 pm Post subject:

eframp · Posted: Tue Mar 18, 2008 9:05 pm Post subject:

Just finished my Tau Pipe with a Bridechamber front panel. I decided to leave off the output trims. It looks like this:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

jhaible · Posted: Mon Mar 31, 2008 4:08 pm Post subject:

Tau Re-issue boards arrived some days ago - prototype from this run built and tested.

I'll be sending invoices this week - don't send money befoire you get an invoice.

First shipment will go to Bridechamber, who helped to make the new run possible.

JH.

Cat-A-Tonic · Joined: Mar 24, 2008 Posts: 42 Location: Yokohama, Japan

I would like a Tau PCB please.

jhaible · Posted: Mon Mar 31, 2008 4:22 pm Post subject: Re: Tau PCB

Luka · Joined: Jun 29, 2007 Posts: 1003 Location: Melb.

Juergen is there many pcbs left?
I would love one but cant do much for another month or so
Will it be safe to wait another month or should i do something like sell my parents Wink

jhaible · Posted: Thu Apr 03, 2008 12:43 pm Post subject:

jhaible · Posted: Fri Apr 04, 2008 2:06 pm Post subject:

Everyone who has pre-ordered boards from my re-run of 20-Stage "Tau" Phaser
boards should have received an invoice by now.
I've shipped them today to all who have paid already.
Next batch will not go out before 12. April, because I'm on a business trip
next week.

JH.

Stavros · Joined: Oct 30, 2007 Posts: 36 Location: Athens-Greece

Hi Jurgen, I just got my Tau Pipe Phaser(re-run) PCBs. Thank you.

A couple of issues I need your help.

1. I have seen in the “Deluxe Version” of the “Tau” connections that on the output there is provision for a 10μF non polarized Electrolytic and a 100k resistor that do not exist on the “Basic Version”.
I have read the relative messages and have understood the issue.

Is this also applicable to the Solina-Triple Chorus output connections?

2. I have problem in finding a Tempco resistor. I have looked at Reichelt/Banzai/Das Musikding, but have not seen any code for Tempco resistors. I may have missed it. I will appreciate some supplier suggestion and/or an order code number for a 1k one.

Many thanks and Best Regards

Stavros

softfin · Posted: Wed Apr 16, 2008 8:17 am Post subject:

Got my boards today. Thanks again JH!

jhaible · Posted: Wed Apr 16, 2008 2:19 pm Post subject: Re: Tau Pipe Phaser re-run PCBs

loopcycle · Joined: Nov 06, 2006 Posts: 101 Location: California

im finally building my tau.
what are the correct values for the 1V/O and osc level (mod depth) pots?
thanks!

jhaible · Posted: Mon Apr 21, 2008 11:14 pm Post subject:

loopcycle · Joined: Nov 06, 2006 Posts: 101 Location: California

nice! thank you. i had only been looking at your hand drawn diagrams for inputs/outputs. i had not seen this page from the jh tau main page.

Stavros · Joined: Oct 30, 2007 Posts: 36 Location: Athens-Greece

Hi Jurgen,

I have read most of the messages that have been exchanged on the previous issue of the “TAU” phaser PCB, which have been very helpful to me.

I have still few questions/clarifications to ask you and I apologize, if I have not understood correctly something on the previous messages or should you have already given a reply that I missed.

1. I have read in one of your answers that on your module you have a switch for Slew on/off. What legend have you used for this one and where is it connected on the PCB?
2. On your New Panel which you have published, you are selecting with a switch between the 1V/Oct. CV in and the variable CV in, thus you practically have a single input (either/or). Correct? Is this switched or not (the two previous inputs I believe were not the same)
3. Signal input: On the Minimal and Deluxe version diagrams it is shown as a Switched (?) input, (connected to ground when nothing in) on the Basic version diagram it is shown as Normal input (I think). How critical is this connection to ground when no input exists?
The reason this is of special interest to me is that my modular connections are “banana” based and I am not sure how to easily make the connection when a switched input is necessary (this is also relevant to the switched “CV In” connection mentioned above). Please help!
4. Stereo input: On your New Panel you have two signal inputs with a single rotary control. Is this a Stereo (2x10k log) one and then you bridge the two signals into one path; or you bridge them before and you use a normal 10k log pot.? Or you have done something else?
5. “Remote”: Legend on your New Panel stands for CV Out. Correct?
6. Phaser Link: Connecting “Remote (CV out) with CV In of next phaser? Correct?
Could that also be valid connecting L/R Out signal to L/R Input signal of next phaser?
7. CV trim: Legend on your New Panel, is the 1k (lin?) fine tuning pot for the 1V/Oct. CV?
By the way, on “Bill and Will’s notes” on the fine tuning pot it is noted, if I recall it correctly, as 1M pot. Is this a typo error or something else?

Please excuse the ignorant/stupid questions

Many thanks and Best Regards

Stavros

jhaible · Posted: Tue Apr 22, 2008 2:29 pm Post subject:

Stavros · Joined: Oct 30, 2007 Posts: 36 Location: Athens-Greece

Hello Jurgen.

in one of your answers in a previous message you write:

"The 100k resonance pot has a 20k (final value tbd) resistor in series with its cw end. (i.e., cw end of pot goes to 20k resistor, 20k resistor goes to board connector.)
The switch of the pull pot is connected to short the 20k resistor, when the knob is pulled out. So I get nice high resonance *without* oscillation with the knob pushed in, and screaming oscillation when pulled out.
You can also wire this up with an ordinary pot and switch, of course."

Q. The switch will connect the CW end of the pot to the board connector either directly or through the 20k resistor, correct?

Thanks and Best Regards

Stavros

jhaible · Posted: Wed Apr 23, 2008 1:12 pm Post subject:

Stavros · Joined: Oct 30, 2007 Posts: 36 Location: Athens-Greece

Hello Jurgen,

Where is the Bounce / Direct Switch, that appears on your New panel, connected on the PCB?

Best Regards

Stavros

jhaible · Posted: Thu Apr 24, 2008 9:23 am Post subject:

funkyfarm · Posted: Thu Apr 24, 2008 1:33 pm Post subject:

PrimateSynthesis · Joined: May 02, 2008 Posts: 69 Location: U.S.A.

I have a number of questions. Hopefully, others will chime in as I'm sure that JH has much better things to do :)

Firstly, in order to determine what size transformer is needed and how much additional circuitry can be powered, approximately how much current does the phaser draw??

"Can use either a 18V single secondary winding, or two 18V secondary windings, or a 36V CT. In the first case, the board does half wave rectification; in the other cases, full wave rectification. If using a CT transformer, the center tap goes to pins 2 or 4 of the 5-pin connector. "

I don't understand, how can an 18V CT and 36V CT could both work well?? Also, putting more than 36V across two 35V caps seems like a bad idea.

Secondly, I'm rather confused about the stereo matrix. I would like to add wet/dry controls to each channel, in order to use it in line. At first, I thought I would use two stereo pots to mix the input with each output. Upon further review, it seems that the input and outputs are already being at U4. Is there a more elegant way to add wet/dry controls without adding additional summing amps??

Thirdly, in trying to add more modulation sources, such as an envelope follower, what is the voltage range of the internal modulation sources?? In other words, what is the level of the internal LFO, and the expected values of CV IN and CV OUT?? I'm guessing the dividers around U5B are to provide a special curve??

Finally, what is the intended goal or set-up procedure for the gain trimmer R18 and resonance trimmer R5?? Is there a problem with increasing the R5 and decreasing R4 by the approximately same amount (eg. making R5 100K and R4 160K)?? Is there any advantage in putting R4 on the panel?? There seem to be two pots that both control resonance.

Thanks :)

jhaible · Posted: Sat May 03, 2008 10:15 am Post subject: