Need Help ... Anyone know what these are ??

[Melanhead]

Well, first off, this is a great place! ... I'm a newby to modding pedals but have modded tube amps for years ( just for fun of course ...) and stumbled across these circuit boards in my junk droor. I bought 'em up a long time ago from the service department of a music store I once worked in and figured I'd get around to wiring 'em up but I'm not sure what they are

One is an MXR and the board says "Studio Sounds" on one side and OD1a on the other shown here: IC's are 2 LM741 and 1 4013a

http://users.eastlink.ca/~melanhead/PIX/MXR1.jpg
http://users.eastlink.ca/~melanhead/PIX/MXR2.jpg

The other is a big mystery... All that is stamped on it is 999 or 666 depending how you look at it ... shown here: IC's are 3 SM72558p

http://users.eastlink.ca/~melanhead/PIX/UK1.jpg
http://users.eastlink.ca/~melanhead/PIX/UK2.jpg

As well as these boards I found 2 early 80's Boss OD1's, 2 Dynacomps, 3 Phase 90's and 3 Distortion Pluses ... I think they're all early 80's...

The OD1's both work and I'm using 'em ( slightly modded ) and 1 Dynacomp... I haven't spent any time on the others yet but should be fun ... just wish I had the boxes!  ...

Any help would be appreciated as I've scoured the internet and can't find any info...

Thanks ...

[analogguru]

First PCB ist from an MXR_Bluebox

Second PCB is a 4-stage FET-Phaser, maybe a  MXR Phase 90 or something similar from Ross etc.

analogguru

[Melanhead]

Great! ...thanks ...now I just need schematics ...

[loscha]

the phaser is a definitely a Maxon "Phase Tone"
that blue thing, with the script writing.

the schematic is around online.

[Melanhead]

Very cool then! ... thanks ...

[loscha]

I'll dump this PDF here for a few days.
it was sent to me by another user on this group. it is not 100% the same, as the board you have has a hardware bypass, not a flippy-floppy one like on this schematic, but, it's near enough.

http://users.tpg.com.au/reveng/mpt.pdf

[Melanhead]

Thanx muchly!

[sir_modulus]

I hate you!!! You lucky butt! That's an AMAZING find. Even if you just boxed everything up, that's like $700-800 worth of effects. Use them wisely man...some of that stuff is like treasure to some people.

Cheers,

Nish

[Melanhead]

I hate you!!! You lucky butt! That's an AMAZING find. Even if you just boxed everything up, that's like $700-800 worth of effects. Use them wisely man...some of that stuff is like treasure to some people.

Cheers,

Nish

Yup! ... I should be able to get most of it running again, but I'll have to buy a bunch of boxes ... Luckily I do have a bag of 80's MXR pots.

I'm just getting back into pedals again after selling most of 'em on ebay a few years ago ....

had kids and gave up some hobbies ... for a bit

[Melanhead]

Well thanks to cd's pix of the Phase 90 boards

http://diystompboxes.com/sboxforum/viewtopic.php?t=26093&postdays=0&postorder=asc&highlight=zakk+wylde&start=15

I just realized that the 3 I have are Script! ... Hope I can get at least one working

I love this place! ....

[sir_modulus]

Oh wow...way to rub it in!!!! =P

That's an amazing find man...amazing! Good luck on reboxing them!

Cheers,

Nish

[Melanhead]

Thanks man .... Sorry to rub it in .... They've been sitting in the drawer for about 7 years ... I keep looking at 'em but finally have some time to play make 'em work ...

I'm a bit excited ...