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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc. |
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12th Jun 2017, 8:19 am | #21 |
Rest in Peace
Join Date: Mar 2006
Location: N.W. Oxfordshire(Chipping Norton)
Posts: 7,306
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Re: Cassette death by take-up torque
Away back in post#6 Ben mentioned Tanashin Cassette Mechanisms. They, and clones thereof were used in a wide range of in-car cassette players, including some by leading brands such as Blaupunkt, Clarion, Philips, and Pioneer, who all fitted the TN303 to some of their products. I totally concur with Ben's description of the problems they caused. Decks like the TN303 are now to be found in some of those 'Fake Antique' Music Centres from China, so the problem hasn't gone away. A worse mechanism, fortunately now consigned to history, was the EDI Leader, later RIEL basic mech., which originally didn't have any kind of autostop, although later versions had an electronic 'pulse counting' one. I first came across them in the Radiomobile 301CS (made in Italy) back in the 70s.
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12th Jun 2017, 11:17 pm | #22 | ||
Octode
Join Date: Jul 2006
Location: Perth, Western Australia
Posts: 1,965
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Re: Cassette death by take-up torque
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In their advertising literature the makers of Celemony Capstan do not claim it works on mere speech, and in a discussion on another forum, a Celemony company representative stated he had tried but had no success removing Wow and Flutter from mere speech recordings. It only worked for him on music recordings and on the "polyphony" within it. I guess Capstan would appear to be "a temperamental beast" if an operator didnt understand this limitation. Perhaps this same limitation also applies to Cedar Respeed... Last edited by TIMTAPE; 12th Jun 2017 at 11:29 pm. |
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3rd Jul 2017, 11:15 am | #23 |
Heptode
Join Date: Mar 2010
Location: Hemel Hempstead, Hertfordshire, UK.
Posts: 840
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Re: Cassette death by take-up torque
Back on the original subject, how many cassette decks offered double capstan drive WITHOUT tension applied over the two by different capstan sizes? I have one sony deck from 1973 that does this and it goes a long way to preserve tapes. So many decks pull at the tape too strongly that it is a breath of fresh air to find one that is kind to the tape.
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3rd Jul 2017, 4:19 pm | #24 | |
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
Posts: 8,809
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Re: Cassette death by take-up torque
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4th Jul 2017, 3:49 am | #25 | |
Octode
Join Date: Jul 2006
Location: Perth, Western Australia
Posts: 1,965
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Re: Cassette death by take-up torque
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The slightly different speeds assume the tape is somewhat elastic and the tape's elasticity limits the tension. Thicker tapes which are less elastic get more tension, which they can stand. Thinner more fragile tape get less tension which is just as well. So with dual capstan the tape tension should self regulate. That's my understanding. But badly regulated take up torque is no good for cassettes. Either too much or not enough can be a killer. Another factor often not appreciated is that tapes need a controlled back tension upstream of the main capstan or upstream of both if it's dual capstan. Without it the tape can ride up or down the capstan shaft/pinch roller and destroy itself. Some cheaper machines rely only on the back tension supplied by the small felt pressure pad but of course if that pad fails, the back tension is lost and the tape can chew itself at the capstan. Excessive take up tension brings this on earlier. That's been my experience. Last edited by TIMTAPE; 4th Jul 2017 at 3:56 am. |
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