I’ve been messing around with an EEI 747 parabolic since yesterday. I haven’t used this cartridge for years. It is a seemingly average MM affair albeit with aspirations, boron cantilever and nude parabolic diamond. Plug it into a standard MM phono stage though and it won’t work, this thing has a 0.1mv output and is designed to see a 100ohm load. It also likes a bit of capacitance, I am undecided on how much. Sound wise it is surprisingly good, a sort of finesse with big bollocks delivery.
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I remember them being issued, never heard one that I can recall. Got pretty decent reviews IIRC.
Yes I can see why, it is a sort of mix of both worlds solution at what was probably a reasonable cost for the time. The opposite of a HOMC 
I like Supex carts, got a couple of SD900 and SD900 Super, along with the MM one SM100E which is a favourate of mine.
Along with @pmac I have an Audio Tekne MC, which is a lovely cart.
I like the Ortofon P-mount Concorde MC200 as well, very nice cart that can be used in normal SME mounting.
Not exactly esoteric, but the AT Art1 is a real fav of mine, hence why I have a few.
Got a collection of Dynavectors too, the 23RS and the original Karat’s are nice.
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I think quite a few of mine (but not all) could be construed as ‘unusual’ 
Audio Note Io Ltd
Audio Tekne MC-6310
Fidelity Research FR-7
Fidelity Research FR-702
Fidelity Research FR-1 mk3
Highphonic MC-A3
Ortofon SPU-G Mono
Ortofon SPU-G Stereo
Panasonic EPC-450 C
Supex SD-900 Super
Supex SD-909
For now 
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I forgot I have a FR MC-201, can’t say what it’s like as I have never used it. Looks nice though.
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I’ve been looking for one of them at a sensible price
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Rega Exact, it’s yellow and current incumbent.
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Kiseki Purpleheart NOS - serial no. 9 of 49 made.
Still like the Decca Deram ceramic, personally. It sounds great, at least until the stylus falls out, does a quick circuit of the record and flies off the back of the plinth, which happens every few weeks.
I’ve also got a nice example of Garrard’s first stereo cartridge, which appears to be two mono ones shoved together. It looks like a tiny little V8 engine, in fact.
@ICHM and @pmac , very nice collection of cartridges 
I had to google the Audio Tekne as I have never heard one, looks interesting.
I love the look of that.
Very nice, got a pic?
It’s quite interesting, the coil is more like a printed circuit and sat at the end of the beryllium cantilever, sort of like a London Decca.
Does it have Decca traits sound wise?
I wouldn’t say so as such, but never had a chance to directly compare.
In general though I always found it extremely neutral with plenty of detail, probably thanks to the stiff cantilever and shibata tip.
I keep meaning to send it off to see if it can be re tipped.
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That sounds interesting and unusual.
