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: 235 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: 189 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: 33 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: 189 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: 189 Location: Cologne, Germany