Interested in Tau Pipe Phaser / Flanger boards ?

L-1 · Posted: Thu Mar 17, 2011 3:33 pm Post subject:

How about to replace LM394/SSM2210 transistors pairs to BC847BS ?
http://ru.farnell.com/nxp/bc847bs/transistor-dual-npn-sc-88/dp/1081234
It's NPN transistors pair in SMD package. I found characteristics very similar. I think it is possible to mount them in regular 8-pin IC socket.[/url]

L-1 · Posted: Thu Mar 17, 2011 3:38 pm Post subject:

BC847BS is in 100 times cheaper!

bibi · Joined: May 24, 2011 Posts: 1 Location: hotdoggland

New member, sorry if this has been discussed before but I can't find anything about this topic here

I'm very interested in making one of these however CA3086 and the like are long gone. What are people using as a replacement or is there still a source here in Europe beyond the obscene prices on Ebay?

Thanks!

The Bad Producer · Joined: Mar 08, 2009 Posts: 282 Location: The Manhole

Musik Ding sell the 3086:

http://www.musikding.de/

They're in Germany, but I'd probably order from Smallbear:

http://www.smallbearelec.com/home.html

or Bridechamber:

http://www.bridechamber.com/Hard_2_Find_ICs.html

Who are both in the States, but cheaper...

sonicwarrior · Joined: Dec 22, 2005 Posts: 266 Location: Cologne, Germany

Has anyone tried to use That 300 as a replacement for the SSM2210 yet?

Unfortunately they are not a direct replacement but with an adapter socket (Conrad 187607) this should be possible.

I'm asking because it seems that no one wants buy my second Tau Phaser PCB with a Bridechamber front and I might assemble it myself then as I have enough That 300s from a stupid order (back then I thought I would be able to design something with them).
I'm not sure if I have a use for two Tau Phasers though. Confused

defex · Joined: Jun 27, 2008 Posts: 36 Location: Toronto, canada

I got 100 3046 from ebay for $30. they are from a US supplier, and of the ones I used for 2 phasers (22 of them) they all worked

sonicwarrior · Joined: Dec 22, 2005 Posts: 266 Location: Cologne, Germany

I have finally wired up my first Tau Phaser but it looks like I have an error somewhere:
- The mod LFO creates slightly audible click sounds. Or is this normal?
- The CV out doesn't seem right as it puts out a constant + 9,4V

Serenadi · Joined: Jul 03, 2007 Posts: 89 Location: Germany

No audible clicks here.

I measured at the CV output (also pin7 of U5B) a voltage between 8,7V (ccw of pitch pot) and 0V (cw). Please note this is reversed! (Any use of such signal outside of the phaser ? Wink

Please verify the components around U5B.

This output voltage is the ccw voltage of the OSC_Level pot. Maybe your +9,4V shifts the LFO output to a clipped LFO signal which causes the clicks at the phased signal.

Cheers,
Bernd

sonicwarrior · Joined: Dec 22, 2005 Posts: 266 Location: Cologne, Germany

eidco · Joined: Sep 19, 2008 Posts: 2 Location: Beverly Hills, CA

I thought the readers of this thread would be interested to know that I'm selling a working Tau Pipe on eBay:

http://www.ebay.com/itm/321178724039

(I apologize if posting this is not allowed and will understand if it's removed.)

Thanks,
John Eidsvoog

nuipb · Joined: Oct 06, 2009 Posts: 49 Location: France

Hi to all, I am currently building my own JH Tau phaser and I was wondering if any of you had had any issues with the internal cabling ? In terms of quality, terms of position, are the cables an important issue to handle to get a good sound ?
In other words, did anyone get parasite sounds or else because of a bad position of a cable or a low quality cable ?
I am asking as I noticed that some devices were sensitive to this aspect of the build and some others weren't.
Thanks for sharing your experience with me.

nuipb · Joined: Oct 06, 2009 Posts: 49 Location: France

sonicwarrior · Joined: Dec 22, 2005 Posts: 266 Location: Cologne, Germany

Unfortunately not yet but I didn't invest much time in debugging. Wanted to finish my second Tau at first to compare both. I'm currently working to finish my Neural Agonizer and have planned to finish it afterwards. This one will feature THAT 300 chips with adapter sockets. Hopefully that'll work.

nuipb · Joined: Oct 06, 2009 Posts: 49 Location: France

OK, thanks for the answer. Please keep us updated with the result of your comparison !

sonicwarrior · Joined: Dec 22, 2005 Posts: 266 Location: Cologne, Germany

@nuipb:
I'm currently working on my second Tau Phaser.
Do you really have both problems I mentioned? I tested with my first Tau Phaser again and when I have a jumper at the 'smooth' header the audible clicks are gone.

And I'm not using the CV out. I have a Bridechamber front panel with the label 'CV thru' and for that I just use a passive multiple from the V/Oct input.
I still get only a constant voltage from the CV out header. The internal LFO works but the CV out comes from the 'Manual Sweep Function Generator' not the LFO. So maybe that is normal as I'm not sure what that is supposed to do.