Vintage SCRIPT vs Vintage BLOCK logo MXR Phase 90

cyberpunk409

cyberpunk409

New member
i just bought a vintage BLOCK logo MXR PHASE 90 off ebay (haven't got it yet). The year of manufacture, according to the seller/pot code is 1979.

Here is a picture of the circuit board:
285225870.jpg


Now here is a picture of a vintage SCRIPT logo phase 90, made in 1977
285225869.jpg


What the heck is the difference?

The later vintage BLOCK logo boards (still owned by MXR - pre-dunlop) did look different, something like this (circa 1979):
285226573.jpg


And the even later BLOCK logo boards (still owned by MXR - pre-dunlop) got a complete overhaul, dropping the single 6 opamps and replacing them with 3 dual opamps, among other things:
285226575.jpg


so my question is... what exactly have i purchased? cheers to anyone who can shed some light on the matter :)
 
Re: Vintage SCRIPT vs Vintage BLOCK logo MXR Phase 90

i should probably also add, that this is an EVEN older circuit board, from 1974:
285228599.jpg


So does this mean that there was a transitional period where SCRIPT and BLOCK logo Phase 90's had the SAME circuit board/same chips?

i'm thinking maybe late '77 to early '79 ?

If so, does that mean that there are varying levels of "collectability" among vintage SCRIPT logo Phase 90's themselves?

this is all doing my head in :(
 
Re: Vintage SCRIPT vs Vintage BLOCK logo MXR Phase 90

Man, when I was trying to figure out which Phase 90 to get one ebay I was doing a ton of research on it, but I've since forgotten. The very early Scripts are Bud Box ones, right? That's your second post. Then come the standard scripts, and I think I remember that the early block logos are pretty similar to the scripts, then the next two generations are pretty different. There were a few good threads in the harmony central effects forum regarding this, if you want to venture into that place. ;) Good luck my friend.
 
Re: Vintage SCRIPT vs Vintage BLOCK logo MXR Phase 90

Here's a shot of the board of my '79 Block logo Phase 90. It shares some common ground with the later script boards, but with a few different components. ErikH's assesment is correct.

IMG_0559.jpg



Cheers.............................wahwah
 
Re: Vintage SCRIPT vs Vintage BLOCK logo MXR Phase 90

interesting... i have now collected 3 pics of 1979 Phase 90's all with different circuit boards. Must've been a year when they were using up the last of their old stock, mixing and matching components with newer ones. Wonder if there's a 4th version of a 1979 PHase 90???
 
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