Hey guys. I just took a bunch of photos of my old 1973/74 workhorse Phase 90. I've had this thing for a long time. Hope you dig them.
The pot is dated 137 7346, so the 46th week of 1973. This seems to be a very common pot date for early MXR pedals. They must have bought a ton of them.
The chips are dated the 39th week of 1973.
I replaced the old deteriorated foam, but you can see lots of particles left over on the board. The only thing changed is the battery connector, I think. Oh yeah, and the screws look too new, so are probably replacements...
Early MXR Phase 90 pics (Data Dump)
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- fernieite
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Early MXR Phase 90 pics (Data Dump)
Last edited by fernieite on Mon Oct 26, 2020 2:03 am, edited 8 times in total.
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- fernieite
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- Joined: Wed Aug 27, 2008 11:16 pm
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Re: Early MXR Phase 90 pics
Last edited by fernieite on Mon Oct 26, 2020 1:19 am, edited 1 time in total.
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- jreeves47
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Re: Early MXR Phase 90 pics
super awesome! I've only seen a couple earlier than yours. how's it sound?
can you read the revision number on the track side of the circuit board? its P90 followed by a lower case letter
can you read the revision number on the track side of the circuit board? its P90 followed by a lower case letter
- fernieite
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- Joined: Wed Aug 27, 2008 11:16 pm
- Location: Toronto. Age: Early 60s
Re: Early MXR Phase 90 pics
Cool. It sounds awesome, I love it!
The circuit revision is P90c.
Here's another one of the pot. It's not stamped Mxr like some of them are.
The circuit revision is P90c.
Here's another one of the pot. It's not stamped Mxr like some of them are.
Great deals with: Stu, Graham, Sickle, Devnulljp, SteveG, peps1, paine, fuzzface6669, jetofuj, sciencefriction, jerms, rafmax, Bigfoot2000, whiskeyfuneral, monolithfuzz.
- jreeves47
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Re: Early MXR Phase 90 pics (Data Dump)
thanks!
here's the earliest pic I've seen of one - serial number 1040 so might be the 40th one made
here's the earliest pic I've seen of one - serial number 1040 so might be the 40th one made
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- fernieite
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- Joined: Wed Aug 27, 2008 11:16 pm
- Location: Toronto. Age: Early 60s
Re: Early MXR Phase 90 pics (Data Dump)
Man, the layout is quite different from my revision c.
Is that the first circuit layout? - P90 or P90b? Anymore photos?
Is that the first circuit layout? - P90 or P90b? Anymore photos?
Great deals with: Stu, Graham, Sickle, Devnulljp, SteveG, peps1, paine, fuzzface6669, jetofuj, sciencefriction, jerms, rafmax, Bigfoot2000, whiskeyfuneral, monolithfuzz.
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