Re: Dual-transport/capstan modification for existing single capstanOn Mar 25, 6:54 pm, Codifus <codi...@optonline . net > wrote:
> Sonnova wrote:
> > On Sun, 16 Mar 2008 21:29:46 -0700, ilovechristina2...@gmail . com wrote
> > (in article <frks3q03...@news2.newsguy . com >):
>
> >>On Mar 16, 11:15 am, "Serge Auckland" <sergeauckl...@btinternet . com >
> >>wrote:
>
> >>><ilovechristina2...@gmail . com > wrote in message
>
> >>>news:frjaga012dc@news5.newsguy . com ...
>
> >>>>First off, I hope that this subject fits in this category, it's the
> >>>>closest one I could find. I know this question is a little weird, but
> >>>>my reason for asking is in regards to recording to and listening to
> >>>>slightly stretched/wrinkled/warped tapes. I have alot of tapes I got
> >>>>used with good music on them (stuff you can't find on CD anywhere
> >>>>else), but the previous owners were slightly reckless with the media,
> >>>>playing them in cheap players and letting the tapes sit for years
> >>>>without moving rewinding or moving them through a transport every few
> >>>>months. I am convinced that I can get slightly better results with a
> >>>>transport that sports some type of tensioning system, such as a dual
> >>>>capstan system. However, right now I can't afford a Dual-Capstan
> >>>>system and I really like the deck I have. I currently have an Onkyo
> >>>>TA-2600 Deck (3-head, 3-motor, silent transport) and it sounds
> >>>>beautiful, however only on pristine cassettes. I slightly higher/
> >>>>later models had a second capstan/pinch roller (they used the same
> >>>>shell and I THINK the same transport chassis). How difficult would it
> >>>>be to say add a second capstan? That may be next to impossible, so I
> >>>>was thinking more of a logical approach. Would it be possible to add
> >>>>some sort of tensioning apparatus inside the cassette compartment that
> >>>>would stretch uneven/warped tape a bit more so they would have better
> >>>>contact with the heads? If this all sounds like too much of a hassle,
> >>>>then does anyone know where I could find a cheap (yet high-end) 3
> >>>>head, dual capstan system in somewhat decent condition? eBay is nuts,
> >>>>craigslist is barren and most for-sale sites list their decks at $200
> >>>>or more. I don't have that kind of money right now and can't justify
> >>>>spending a crazy amount on a tape deck. I got this TA-2600 for , get
> >>>>this, $26 because the left input rac jack was broken. Any help at all
> >>>>would be helpful...I think it would be kind of cool to mod this deck a
> >>>>little. Thanks!
>
> >>>It's not so much a modification you're asking for, but a redesign, and
> >>>that's way outside of what you can do at home unless you have a very well
> >>>equipped mechanical workshop. The best dual-capstan decks I know of are the
> >>>Nakamichis, 482Z, BX300 and the like. They had two capstans of different
> >>>diameters, running at different rotational speeds to spread the W&F and
> >>>resonances, and also, they two capstans had *very* slightly different linear
> >>>speeds to maintain tension across the heads. The Nakamichi heads pushed the
> >>>standard cassette pressure-pads out of the way.
>
> >>>As I think what you're asking for is not feasible, what you need to do is to
> >>>find a way of reducing the effect of wrinkles in the tape. One way is to
> >>>increase the pressure-pad pressure, perhaps by fitting a small piece of
> >>>foam-rubber behind the pad, inside each cassette. This will have the effect
> >>>of smoothing the tape, but at the expense of increased flutter, and possibly
> >>>even speed accuracy. Speed accuracy can be checked and corrected-for,
> >>>there's usually a small adjuster at the back of the motor: flutter you can't
> >>>do much about, although you can try and lubricate the pressure pad with a
> >>>DRY lubricant, like graphite. All this is a lot of bother, and needs to be
> >>>done per-cassette, but you only need to do it once per tape and copy them to
> >>>CD or MP3/AAC, then play the digital media.
>
> >>>Good luck.
>
> >>>S.
>
> >>>-- * audiopages.googlepages . com
>
> >>Very sound advice. Thank you. I'm glad noone's telling me to "just
> >>forget about cassettes and get an iPod." Tapes sound
> >>better...period. This sounds like a good thing to try, but if anyone
> >>else has any opinion, I'm still open to suggestions. Thanks!
>
> > Sony and a few other brands made dual capstan decks too. I used to have one
> > that not only sported dual capstans but had three heads, THREE MOTORS, and
> > Dolby HX-Pro to boot! It was called the Aiwa F990. I used it for years before
> > the belt (one capstan motor, two capstan/flywheel assemblies) broke and I was
> > disinclined to get it fixed. Of course, now, I regret that and would love to
> > have it back. It made the best sounding cassettes I ever heard. Low in
> > flutter, excellent high-frequency response (HX-pro) and low noise using
> > premium cassettes.
>
> I used to absolutely love the cassette medium. Something about making
> your own tapes, recording your favorite vinyl to a TDK MA-X tape,
> setting the bias and recording levels, and every once in a while making
> sure that the azimuth is correct.
>
> You know the thing about Dolby HX-Pro? It was a cleverly marketed but
> faux "panacea" for high frequency headroom. I, too owned, actually still
> own, a 3 head, dual capstan deck with Dolby HX pro, the JVC-TDV-621. I
> had it specfically tuned by JVC for TDK tapes.
> I loved the tapes it used to make.
>
> Now, if you looked at the mass market of cassette decks, all the
> manufacturers, Sony, Aiwa, JVC, TEAC, you name it, had Dolby HX pro. All
> except 1, Nakamichi. They were the Rolls Royce or Bentley of all tape
> decks. I compared several models of other manufacturer's decks to
> Nakamichi and figured out why Naks didn't have HX-Pro: They didn't need
> it. The bias frequencies used by Naks was easily twice as high as the
> bias frequency used by other tape deck manufacturers. The figures are a
> bit elusive now, but it was something like all other tape deck makers
> using a bias frequency of 120 to 160 Khz and Naks used a frequency of
> 300 Khz or more.
>
> No wonder that Naks could get even their normal tapes to record high
> frequencies just about as well as metal tapes. With all other
> manufacturers, metal was the exception when it came to high frequency
> headroom.
>
> When it came to cassette decks, "That's what's up" wholeheartedly
> applied to Nakamichi cassette decks.
>
> They were "tha bomb." No doubt.
>
> CD- Hide quoted text -
>
> - Show quoted text -
I've decided to drop the idea (since it apprently is next to
impossible) and go with a Pioneer CT-F1250 deck...but it has issues
and there's a thread dedicated just for that, if anyone has any ideas,
I could sure use them. Thanks....and thanks for the help so far.