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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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 Posted: Thu Jun 28, 2007 10:01 am Post subject:
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| ringer wrote: | Hi JH,
Is the value for the 40 caps, 15uf, 1.5uf or 15nf? I tried ordering the 15uf value for Wima and Baldwin said it didn't exist, thanks.
Ringer |
15nF
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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Master of Circles
Joined: Jun 27, 2007
Posts: 14
Location: Hamburg
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| Posted: Sat Jun 30, 2007 7:08 am Post subject:
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Hello,
I´d like to order one board.
I just wrote a mail to Jürgen, so I hope it´s not too late.
Sounds very very freakish, that Tau-Phaser 
Greetings,
Master od circles |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sun Jul 01, 2007 2:30 pm Post subject:
Boards ordered |
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Ok, I got the impression that anybody who wanted to order a pcb, has done so by now.
The order is placed, so we reached a "point of no return".
This doesn't mean that I won't accept any more orders (in fact, I'll have a few more manufactured than I have pre-orders for), but I can only take a limited number of orders, starting from now.
If everything works as intended, the boards will be made in Germany (not in Bulgaria, like my prototype).
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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HPL
Joined: Jun 28, 2007
Posts: 7
Location: Vienna
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| Posted: Wed Jul 04, 2007 6:28 am Post subject:
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oh no. i hope i can get 2 boards and its not to late now. i knowed i should post his last week.
edit: dont read your full text. i hope there are enough left for me and a friend. |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Wed Jul 04, 2007 1:14 pm Post subject:
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| HPL wrote: | oh no. i hope i can get 2 boards and its not to late now. i knowed i should post his last week.
edit: dont read your full text. i hope there are enough left for me and a friend. |
Orders can still be placed, until the actual number I have ordered for manufacturing is spoken for.
Please use *only* an email, in the form I posted, to order.
(I'm afraid you have to scroll back in this thread and read it.  )
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Wed Jul 04, 2007 1:18 pm Post subject:
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Update of documentation - Schematics etc.
http://www.jhaible.heim.at/tau/jh_tau.html
A lot of new stuff added to this page today.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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Fernando
Joined: Dec 30, 2006
Posts: 286
Location: Barcelona & Emporda, Spain
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| Posted: Wed Jul 04, 2007 3:09 pm Post subject:
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| "de luxe", thanks a lot! |
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StephenGiles
Joined: Apr 17, 2006
Posts: 507
Location: England
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| Posted: Thu Jul 05, 2007 2:00 am Post subject:
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This is just awesome JH, quiero conocer el Tau Phaser por dentro (with appologies to Gotan Project)!! Unfortunately I've just bought a new all singing all dancing HiMD Minidisc recorder so "el banco" at home will not be pleased if I have the F Shifter boards and these - oh well out with the veroboard!!
Last edited by StephenGiles on Sun Jul 15, 2007 12:27 am; edited 1 time in total |
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moosapotamus
Joined: May 11, 2007
Posts: 113
Location: New Hampshire USA
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| Posted: Thu Jul 05, 2007 12:54 pm Post subject:
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Just curious... how would this sound if you bypassed some of the stages in the all-pass filter section and only went through 12 or 8 stages, for example?
~ Charlie
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moosapotamus.net
"I tend to like anything that I think sounds good" |
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Serenadi
Joined: Jul 03, 2007
Posts: 89
Location: Germany
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| Posted: Thu Jul 05, 2007 1:11 pm Post subject:
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| moosapotamus wrote: | | ...how would this sound if you bypassed some of the stages in the all-pass filter section and only went through 12 or 8 stages, for example? |
Interesting question, moosapotamus.
I modified a small phaser from a german manufacturer, used only 3 stages of 6.
Hm, sounds more like a filter with some resonance peaks, but worth to make it switchable. |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Thu Jul 05, 2007 5:33 pm Post subject:
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| Serenadi wrote: | | moosapotamus wrote: | | ...how would this sound if you bypassed some of the stages in the all-pass filter section and only went through 12 or 8 stages, for example? |
Interesting question, moosapotamus.
I modified a small phaser from a german manufacturer, used only 3 stages of 6.
Hm, sounds more like a filter with some resonance peaks, but worth to make it switchable. |
I think this topology (transistor/capacitor lattice network) needs a lot of stages, and quite a bit of resonance, to sound really good.
The all pass stages themselves are not that ideal (compared to an opamp/LDR topology, or even compared to an OTA all pass filter); the benefit is that you can have such a lot of them with little effort.
If you want to get an impression how 14 stages sound, the ARP Quadra synthesizer gives some clue. It's still rather deep. (But it doesn't have that special e**x and 1/x modulation circuit.)
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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moosapotamus
Joined: May 11, 2007
Posts: 113
Location: New Hampshire USA
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| Posted: Fri Jul 06, 2007 10:05 am Post subject:
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Well, sometimes "bad" is "good".
And, sometimes a cigar is just a cigar.
Anyway... it's a common thing to do with phasers to have an adjustable/selectable number of stages. So, I was just curious.
Sometimes "not as good" is just that... "not as good". Sound like that may be the case.
Thanks
~ Charlie
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"I tend to like anything that I think sounds good" |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Fri Jul 06, 2007 1:45 pm Post subject:
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| moosapotamus wrote: | Anyway... it's a common thing to do with phasers to have an adjustable/selectable number of stages. So, I was just curious.
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Well, it would be possible of course, but you'd either have to switch the signal at a very sensitive point (few millivolts, high impedance ...), or you'd have to build several instumentation amplifiers (low noise dual opamp, 3rd opamp, de-emphasis components). If you want to try it (with an extra little circuit on veroboard, maybe), you just have to tap the ladder differentially along its lenght.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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moosapotamus
Joined: May 11, 2007
Posts: 113
Location: New Hampshire USA
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| Posted: Sat Jul 07, 2007 7:21 pm Post subject:
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| jhaible wrote: | | If you want to try it (with an extra little circuit on veroboard, maybe), you just have to tap the ladder differentially along its lenght. |
I was thinking that a 4-pole rotary switch might do the trick. But, maybe I'll try tinkering with it whan I get my board. 
Thanks!
~ Charlie
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sun Jul 08, 2007 7:19 am Post subject:
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| moosapotamus wrote: | | jhaible wrote: | | If you want to try it (with an extra little circuit on veroboard, maybe), you just have to tap the ladder differentially along its lenght. |
I was thinking that a 4-pole rotary switch might do the trick. But, maybe I'll try tinkering with it whan I get my board.
Thanks!
~ Charlie |
Will do, but you'd have to carefully shield the cables to the switch!
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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moosapotamus
Joined: May 11, 2007
Posts: 113
Location: New Hampshire USA
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| Posted: Mon Jul 09, 2007 7:48 am Post subject:
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Thanks for the tip!
~ Charlie
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Serenadi
Joined: Jul 03, 2007
Posts: 89
Location: Germany
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| Posted: Sat Jul 14, 2007 9:20 am Post subject:
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Jürgen,
I've looked over your schematics and found three 22M resistors (R43, R44, R51).
I wonder who's selling them - the highest value, I could find at regular shops in germany is 10M.
Would you please give a brief explanation about their function, why it has to be such a high value?
Is it possible to replace them with two 10M resistors in series - that would be of course only 20M.
cheers,
Bernd |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sat Jul 14, 2007 1:09 pm Post subject:
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| Serenadi wrote: | Jürgen,
I've looked over your schematics and found three 22M resistors (R43, R44, R51).
I wonder who's selling them - the highest value, I could find at regular shops in germany is 10M.
Would you please give a brief explanation about their function, why it has to be such a high value?
Is it possible to replace them with two 10M resistors in series - that would be of course only 20M.
cheers,
Bernd |
www.conrad.com is selling them for 6 Cents.
That's a 5% carbon film resistor, which is ok at these points in the circuit.
One of the three resistors is needed for reference current in the 1/x converter, and the other two are providing a minimum bias current for the ladder when the modulation would otherwise cut off the current.
Conncting two 10M resistors in series is an option; if you look closely at the picture of the board I've published, you see that it's exactly what I did.  (I've replaced them with 22M meanwhile, but I didn't want to wait for my Conrad order to arrive.)
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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goodrevdoc
Joined: Sep 11, 2006
Posts: 288
Location: Philadelphia, PA
Audio files: 1
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| Posted: Sat Jul 14, 2007 6:03 pm Post subject:
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These are on order at Mouser: 22M Resistors
They are 1/4W size and 1% too. Delivery date is 7/31/07. Only Problem is, they're nearly a buck a piece. Not so bad when only buying three though...
-justin |
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Serenadi
Joined: Jul 03, 2007
Posts: 89
Location: Germany
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| Posted: Sat Jul 14, 2007 9:50 pm Post subject:
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| jhaible wrote: | www.conrad.com is selling them for 6 Cents.
That's a 5% carbon film resistor, which is ok at these points in the circuit.
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Oh well - Conrad still exists ...
But it reminds me to order MTA connectors anymore.
Yesterday I saw metalfilm 22M at banzai, 1/2W, for 30 cents.
Anyway, I have to make an order there, too.
Do you think, it's worth to use metalfilm at this sensitive points (R43,44)?
Imho metalfilm is less noisy.
And thanks for the explanation. |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sun Jul 15, 2007 5:49 am Post subject:
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| Serenadi wrote: | | jhaible wrote: | www.conrad.com is selling them for 6 Cents.
That's a 5% carbon film resistor, which is ok at these points in the circuit.
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Oh well - Conrad still exists ...
But it reminds me to order MTA connectors anymore.
Yesterday I saw metalfilm 22M at banzai, 1/2W, for 30 cents.
Anyway, I have to make an order there, too.
Do you think, it's worth to use metalfilm at this sensitive points (R43,44)?
Imho metalfilm is less noisy.
And thanks for the explanation. |
5% carbon resistors are good enough for the 22M values. (not for many of the other resistors in the circuit, though; I generally recommend 1% metall film resistors, so the 22M as the exception.)
Noise: Normally the noise is dominated by other factors at these node of the circuit.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sun Jul 15, 2007 5:53 am Post subject:
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| Serenadi wrote: | | jhaible wrote: | www.conrad.com is selling them for 6 Cents.
That's a 5% carbon film resistor, which is ok at these points in the circuit.
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Oh well - Conrad still exists ...
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And their web site has improoved a few years ago, from abysmal to quite usable.
And apparently they don't throw 1000 different components into a single plastic bag anymore! 
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Thu Jul 19, 2007 3:53 am Post subject:
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Update - Boards available soon!
Got the boards. All of them. And even more than these: Got a considerable number of overproduction boards as well, so all who have been put on the waiting list will get boards, too.
Important!
Do not send me any mails, or money, about your orders yet.!
I will first build another prototype from one of these boards, because they have been manufactured by a different company than the first one. I want to be 100% sure that there is no error, before I distribute all that stuff.
(I sincerely hope that all will be fine, because I have spent more than 1000 Dollars on making these boards alone!)
As a positive side effect, I will probably offer this hand-built prototype (just the components on the board, no pots and switches and jacks) for sale as well. (As I don't know how much to ask for something like that, I'll probably make an auction. )
Back to soldering ... I have a prototype to finish!
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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funkyfarm
Joined: Jan 21, 2007
Posts: 583
Location: France
Audio files: 3
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| Posted: Thu Jul 19, 2007 11:49 am Post subject:
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| jhaible wrote: | | Update - Boards available soon! |
"Tau !!" (as Homer would say  ) |
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majormono
Joined: Jul 20, 2007
Posts: 2
Location: Germanium
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| Posted: Sat Jul 21, 2007 7:00 am Post subject:
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Hi everybody
I'd like one board too, if there are still some left. |
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