Scored this today:

J!m

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#21
KR is the predecessor of SA. That Nakamichi was pretty cool, the idea was to flip the cassette instead of reversing direction so the heads would keep better alignment. A novel idea.
the KR is a true chromium tape, and it used the (3M?) pigment which the Japanese were not happy about. So, to avoid paying for pigment, they developed cobalt doped ferrite in such a way (I forget what they called it) to produce the “super avalyn” particle, hence the SA designation.

after the first improvement in 1983 or so, it remained quite true to the end. (Color got darker too) So my 1984 tapes bias nearly identically to 1994 tapes. Quite uncanny and I never tried swapping the tapes into the other shell to do if then they’d have the same difference... (probably not)
 

VSAT88

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#22
Jim I have a virtual shitload of new cassettes in storage and I need dig them out. Cannot recall what kind but about 30 yeas ago we had a huge AMPEX plant in Opelika, Al. and I think they are AMPEX. Nothing as nice as those you scored though.
 

orange

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#24
Anyway, I'm aware of the dissatigaction with the KR formula and I own it merely to have one. I don't plan to record on it. My SA collection goes back several years toward the start of the series. I have older AD and 80s AD-X as well.

But back to Miles. That is a foundational recording of jazz as we know it. Nice score.
 

J!m

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#25
Nice addition to your TDK addiction, Jim. Is this the only sealed TDK SA-X, of this vintage, you have?

Nando.
Actually Nando, the similar vintage MA you graciously gifted to me is the only sealed MAvof this vintage I have. I have a couple newer variants sealed but that’s the only ‘86-‘87 I have.
 

J!m

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#26
Ampex might have some issues... I used 456 on my open reel (Teac A3340S) back then and later Quantegy 456 on my Tascam 32.

but Ampex is notorious for “sticky shed syndrome” but I have no idea if it extends to their cassette offerings. Type II cassettes may not suffer this fate but I honestly don’t know.

Please dig them out so we can see what’s up!
 

J!m

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#27
I had a chance at a sealed KR for the collection but couldn’t strike a deal. He wanted a trade, and all I had was what he had, or didn’t want.
 
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#29
I have an RX-202, and they are really nice sounding decks.... and the 'Flip' is something worth watching!! They are getting expensive these days and harder to source.

Good grab!
 

J!m

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#30
I checked my higher-end stash early this morning... it includes the aforementioned MA from the Nando collection. The AD below is also from Nando.

I have other SA-X and MA tapes, but they are not sealed. AA7D7DB7-E8FE-4A6B-9F07-150F9F0C398F.jpeg
 

BlueCrab

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#32
Was the last one really $2?! More goodies.

Back on tape topic, which I know nothing about. I noticed the TDK MA states "super wide dynamic range". What kind of dynamic range does tape have?
 

J!m

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#33
Those three records were $10. So, yes, the last one was $2.

The “super wide” dynamic range is wider than the trailer park “double wide” dynamic range.

But really, to fully appreciate a metal alloy tape, your deck needs to be in top condition and be meticulous about your recording. They take a hotter signal but usually have a higher noise floor, so you need to record as hot as possible to drive down the noise. Go too hot, and it’ll distort like anything else.

That’s why SA (and SA-X) are my go-to tape. They take some heat and have low noise. So they are a perfect compromise for me- and always have been. I’ve been using them since the 80’s.

I have re-recorded an MA I bought new in 86/87 and off CD source it sounds damn fine (in my freshly calibrated deck)
 

Elite-ist

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#34
Some great jazz albums from the Hi Fi Museum, Jim. I don't have the Question & Answer album. One of my early mix tapes, I recorded in the 80's, included Pat Metheny on one of the sides.

Nando.
 

J!m

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#35
I have other Pat Metheny records, but I grabbed this because he’s with Dave Holland and Roy Haynes. Mike popped it on and the few minutes I heard sounded nice.

I think that was the expensive one at $5

Edit: I have some other Dave Holland quartet as well.
 
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