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Caleb Kraft
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Re: The fix?
Caleb Kraft   10/25/2013 9:02:39 AM
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Nice! I'm surprised it has held that remagnetization that long!

Flurmy
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Re: The fix?
Flurmy   10/25/2013 8:57:11 AM
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Well, the fix was indeed to remagnetize the small magnets but, luckily, not every time I want to play a tape!

I removed the motor rotor so as to expose the three small sensing coils, then I briefly put a strong neodymium magnet close to the core of each of them.

That's all.

Ad I played many tapes since then. ;-)

Actually, I think it's close to 10 years now that it works flawlessly, but lately my backup hi-fi stack includes a CD player (vintage 1982) so I don't listen to so many cassettes these days...

Caleb Kraft
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Re: The fix?
Caleb Kraft   10/23/2013 2:20:29 PM
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I'm guessing he just remagnetizes every time he needs to play a tape?

GMilliorn
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The fix?
GMilliorn   10/22/2013 3:31:25 PM
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So, what was the "no-brainer" fix?  

You said you could not replace the motor. and that the motor's magnets fail over time.  Shorting the coils does not seem like a fix, so much as periodic maintenence.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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