Just another Phaser ...

[jhaible]

> 
> Hey, I'm glad that someone appreciates this!  I know that this phaser is
> responsible for some of my favorite sounds out there. 

Yes, that's the reason for me, too.

> Let me know what this phaser inspires for you.  

Well, the modulation circuit is rather strange. Will have to look at this
closer. The rest is rather standard, similar to the Mutron. Notable: The
feedback loop only goes around 2 stages. I have to do some simulations
of this circuit ...

> I'd love to see a modern
> design that can produce these sounds.  

I have just published the description and schematics of my "Neptune"
optoelectronic phaser. It's at 
<http://www.synthfool.com/diy/hj_neptune.html>
(Thanks, Kevin !). It is more based on the Univibe rather than the Mutron
design (phase splitter and non-grounded photocells), but it shows the
typical
slow and smoothed modulation that comes from the LDR's response time.

>I am
> repairing my Mutron Phasor II right now, which has a weird metal "can"
> with 10 legs - I presume this is an LED surrounded by 4 photocells.

Phasor II - is this the same as the Biphase ? The Biphase has 6 LDRs + LED
packed together (x2).

JH.