Boss Chorus/MXR Phaser

[Scott Gravenhorst]

On Mon, 9 Mar 1998 15:38:17 +0200 (EET), Joachim Verghese
<jocke at netcontrol.fi> wrote:


>As for phasers, I opened up a Dunlop re-issued MXR Phase 100 the
>other day and found that it only has six all-pass stages. The
>original Phase 100 was a 10-stage device, if memory serves.
>
>The variable resistance elements in the Dunlop unit look a lot like
>Vactrols, although they are labeled "NSL 39V31".
>
>BTW, would anyone happen to know what type of Vactrols the original
>Phase 100 used -- VTL5C3/2 or 5C4/2? (I'm still looking for the MXR
>schemos).

Just opened my Phase 100.  I see 3 opto-isolators labeled 21L 312.
There are 6 8-pin ICs (TI) SN72L022.  Is this 6 staged or only 3?

There's a sticker inside with what might be a seial number?  705092.
How can one tell if it is a "Dunlop re-issue"?

-- Scott Gravenhorst