OK What is this crap on my Otari mx70

  • Thread starter Thread starter Talldog
  • Start date Start date
Shead...

I ran my MRL tape through my new (to me) mx70 and all of this came off. Ran less than a minute. Is this sticky tape shed? It is a different color than I've seen. Is this magnetic? it wasn't on the heads. Just where you see it.

Bake it and it will be fine...
 
Bake it and it will be fine...

yes, yes. That is indeed good advice for MadAudio...depending on whether or not you bake it long enough to totally evaporate the wine...if you do, there's no possible way it will spill on the mixer.

but seriously, am I correct in my understanding that if the issue was oxide shed (flaking) as opposed to sticky shed, baking wouldn't help?

Talldog, it looks like the consensus is to bake the tape, that it is sticky shed. I stand corrected and hope I didn't confuse things. It just looked so dry and flaky. :o
 
yes, yes. That is indeed good advice for MadAudio...depending on whether or not you bake it long enough to totally evaporate the wine...if you do, there's no possible way it will spill on the mixer.

:D :D :D :D :D
 
It looks like sticky-shed.

There should be a small color dot (small round sticker) on the spine of the box. What color is it?

MRL used lots of different tape brands. The color dot will tell you what kind of tape is on the reel.
 
yes, yes. That is indeed good advice for MadAudio...depending on whether or not you bake it long enough to totally evaporate the wine...if you do, there's no possible way it will spill on the mixer.

but seriously, am I correct in my understanding that if the issue was oxide shed (flaking) as opposed to sticky shed, baking wouldn't help?

Talldog, it looks like the consensus is to bake the tape, that it is sticky shed. I stand corrected and hope I didn't confuse things. It just looked so dry and flaky. :o

I guess that that is the difference between sticky goo and no goo :)

I picked up some 456 1" expecting it to be bad. Yup, it left goo just like in the photos. I baked up one of the reels and it ran fine (goo-free!) (this was just 3 days ago).

I got the reels to get the pick of the litter for a takeup reel.

SO now I'm looking for 499 pancakes....

--Ethan

I baked it at 120 for 18 hours.
 
Hey Beck.
The stickers on the mrl tapes are blue. I've called mrl to ask them about it but always get a busy signal.
 
Unfortunately they don't say what the old tapes with blue dots were, but this bit tells you the code for modern MRLs (all three of my MRLs are on SM911 stock):

"1.2.9 Blank Tape Stock: The manufacturers of professional analog
audio tape have been — how should we put it? — in a state of flux.
Ampex Recording Media Corp has been sold to Quantegy Inc, and the
tape is now identified as Quantegy. 3M has sold its pro audio products
to Quantegy, and left the pro analog audio market completely. BASF,
long used in Europe, has been sold to Emtec, and has entered the US pro
analog audio market. The British tape Zonal was sold in the US for a
short time, but the company is now out of business.
Our standard stocks for Open-reel Calibration Tapes for 200- and
250-nWb/m fluxivity are Quantegy 406, which we identify by a yellow
dot on the box spine; and BASF Studio Master 911 (red dot).
Many studios use higher-output tapes such as Quantegy 456, 499, or
GP9, or BASF 911 or 900. We do not always use these tapes, because
they are more expensive and do not provide any benefit for a Calibration
Tape. With very few exceptions the blank tape stock doesn’t make any
difference for a Calibration Tape, because the test signals are
standardized independently of the blank tape. Also, for instance,
Quantegy uses the same base materials, binders, and processing
equipment to make 406 and 456. The only difference is in the oxide
particles — the oxide in 456 has better dynamic range and is therefore
better for recording programs, but it is not better for making a Calibra-
tion Tape, nor does it guide differently, nor last longer.
You can avoid the delay for special production by using the standard
blank tapes – talk to MRL Technical Support if you believe that you
need one of these high-output blank tape stocks.

The one exception is for Calibration Tapes recorded at fluxivities of
355 nWb/m and greater. These require tapes with higher saturation flux
than Quantegy 406. For 355 nWb/m reference fluxivity we use
Quantegy 456 (green dot), BASF 911 (red dot) and Zonal 700 (orange
dot). For 500 nWb/m reference fluxivity, we use Quantegy 499 (gold
dot) or GP9 (green and gold dots), and BASF 900 (lite blue).high-frequency calibration.)

Since there are lots more tape types than dot colors, we have had to
reuse the colors when tape types have been discontinued. If you have a
calibration tape with a red, orange, or blue dot made before 1994-06, call
us with the serial number of the tape, and we can tell you what kind of
blank tape type was used.
"
 
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