Sansui πικάπ - 2017

[Mr Spock]

Sansui SLP-5000BT πικάπ και Bluetooth ηχείο

Ένα ακόμη βασανισμένο όνομα από τα παλιά, το Sansui, χρησιμοποιείται πια από την εταιρία doshisha της Ιαπωνία για να ονοματίζει τα audio προϊόντα της που έχουν κυρίως καταγωγή από Κίνα.

Τώρα με το όνομα Sansui κυκλοφορεί και πικάπ. Πρόκειται για το SLP-5000BT που όπως μαρτυρά ο κωδικό του είναι Bluetooth, έχει πιεζοηλεκτρική κεφαλή , έχει δυνατότητα auto return και θύρα USB για εγγραφές σε PC.

Ακόμη και ενισχυτή 2x3,5W έχει με ενσωματωμένο ηχειάκι. Τέλος το πικάπ μπορεί να χρησιμοποιηθεί και ως Bluetooth ηχείο…

http://www.hxoseikona.gr/nea/5183-sansui-slp-5000bt.html

SANSUI、Bluetooth(R)スピーカー搭載のレコードプレーヤーが新登場 ...

 

[Nick Arvanitakis]

Sansui μόνο κατ όνομα...

 

[Mr Spock]

. . . πιεζοηλεκτρική κεφαλή . . .

Piezoelectric Pickups
Crystal and ceramic pickups operate on an entirely different principle, chemical rather than electrical. It has been known for some time that a crystal made of Rochelle salts will bend without breaking, and will give off an electric signal when made to bend. In piezoelectric pickups the head of the stylus (or, more commonly, a lever attached to the head of the stylus) is inserted into the crystal or ceramic (a synthetic crystal). Its side-to-side swing bends the crystal, and the result is a fairly sizable electric signal. The piezoelectric pickup has certain advantages over the magnetic. It gives off a much larger voltage, which means that it can be used without a preamplifier. Moreover, any extraneous noises that enter the system through the pickup will be far less important, because the intrinsic musical sounds are coming through with 60 to 70 times the strength they would receive from a magnetic cartridge.

The induction coil that makes the electrical signal in the magnetic pickup may in its wanderings come within the field of the turntable motor and transmit a dose of 60-cycle hum, while the piezo-electric pickup is impervious to stray magnetism. Finally, the magnetic is unsatisfactory in moist climates, because condensation forms between the poles of the magnet, eventually corroding the guts of the pickup; the ceramic (not the crystal) is impervious.

Nevertheless, a satisfactory magnetic pickup is easier to design than a satisfactory crystal or ceramic. The stylus in a magnetic pickup need push only a light coil of wire or an equally light metal tube, while the stylus in the piezoelectric pickup must bend a crystal. A baseball which hits a heavy wire screen at 60 miles an hour may dent the screen; a locomotive which hits the screen at that speed will go right through it. In every pickup, the stylus moves at the same speed. If it is to do more work, it must have greater mass.

The greater the effective mass of the stylus, the less responsive it will be to the back-and-forth push given by the moving wiggle on the phonograph record. It will have greater inertia, greater tendency to keep traveling in whatever direction it has been pushed. The strong low-frequency pushes, therefore, will tend to drive the stylus right out of the groove. Keeping the stylus in the groove will demand more stiffness inside the pickup, more resistance to the free motion of the stylus. Most piezoelectric pickups are therefore inaccurate at the lower f frequencies. And the piezo-electric pickup is a constant-amplitude device. The electric signal is caused by the bending of a crystal: the greater the degree of bending, the greater the signal. Records are cut, however, by a constant-velocity cutter, which makes the strength of the recorded signal proportionate to the speed with which the stylus whips around the wiggles. Low-frequency signals become wiggles of considerable amplitude, and high-frequency signals wiggles of infinitesimal amplitude.

Thus the piezo-electric pickup distorts the recorded signal by giving a loud voltage to the low-frequency notes and a soft voltage to the high-frequency notes. Moreover, there may come a time, at very high frequencies, when the amplitude of the wiggle is not sufficient to make the crystal bend, and the piezo-electric pickup will not respond at all.

None of this is quite as bad as it looks. As explained previously, high-frequency signals are boosted when records are made, to mask surface noise; low-frequency signals are attenuated, so that grooves can be kept narrow and lots of grooves cut into a single disc. The piezo-electric pickup, in boosting the bass signals and diminishing the treble signals, acts to equalize the distortion built into the phonograph record. While it will not boost or diminish on a curve that exactly matches the "recording characteristic" of the record, it will do a fair-enough job. And by eliminating the equalizer as well as the preamplifier, it enables a big cost corner to be snipped off. No piezo-electric pickup yet produced commercially will respond throughout the audible range, but a few of the new designs fit the stylus so closely into the ceramic that an electric signal will be produced by wiggles as narrow as 14,000 cycles. From 14,000 cps to 17,000 cps, which is the utter limit of normal hearing, represents a range of less than two whole tones in the musical scale, so a pickup which responds to 14,000 cps is quite adequate even for very high fidelity. Two piezo-electric pickups are made for installation in a full high-fidelity rig: the Electro-Voice Ultra-Linear and the Sonotone. Both companies make special preamps to handle their pickups.

Among all the other piezoelectric pickups, the experts have good words only for some Astatic crystals, the Sonotone, the British-made Collaro and the Dutch-designed Ronette ceramics. These would be adequate for low-cost hi-fi machines, except that even the minimum hi-fi amplifiers now include preamplifiers and are built for use with magnetic pickups. Most of the straight amplifiers presently on the
market do not even have an on-off switch, let alone such refinements as a volume control. They are meant to be used only with a separate preamplifier control unit. So the crystal or ceramic cartridge fades away as a possible buy for anyone building a set from individual components. Where it is still important is in the packaged machine, usually portable or table-top, which uses the stronger voltages from the piezo-electric pickup to sidestep the expense of a preamplifier, and thus gives value for money in the $125 to $175 price range. People who are looking to improve a well-loved package unit with a crystal pickup, though, might try substituting a Ronette for the old crystal. They'll hear the difference.


http://www.enjoythemusic.com/cartridgehistory.htm

 

[Manos58]

Δεν εχει και ενσωματωμενη ξυριστικη κεφαλή ...δεν με κανει
Ουτε φραπε φτιάχνει

 

[Mr Spock]

Δεν εχει και ενσωματωμενη ξυριστικη κεφαλή ...δεν με κανει
Ουτε φραπε φτιάχνει

- να όμως τι άλλο κάνει . . .

 

[Βασίλης Πέτρης]

Καμμια σχεση με την κινεζια του 2017. Όπως λέμε λευκό τυρί τύπου Φετα.

 

[dantonis]

Και που να δετε την AKAI κατι πλυντηρια........μουρλια.....

 

[abcd]

Κάτσε να διαβάσει το θέμα ο Μάρκου και θα σας φτιάξει!

 

[east electronics]

Αν καποιος κανει μια αναζητηση στον Μπεη θα δει τους μηχανισμους αυτους να ειναι σε μια τιμη τυπου 25 ευρω η δεκαδα η κατι τετοιο ....Πραγματικα το εχουν τσιμπησει οτι η φαση εχει τζιρο ξανα και το εχουν ξεσκισει στην κυριολεξια .
Κριμα πολυ κριμα κυριως για νεα παιδια που πιθανον να θελουν να κανουν ενα entry στην φαση θα φανε ηττα τρελλη . Το συγκεκριμενο προιον ηχητικα ειναι απαραδεκτο συν οτι κεφαλες τετοιου τυπου σκαβουν τους δισκους μας .

Για τα ΑΚΑΙ που γραφει καποιος φιλος πιο πανω δεν ξερω τι ειναι τα αλλα τους μοντελα αλλα εχουν και ενα αξιοπρεπεστατο μοντελο για την τιμη του τυπου 200 ευρω και επιπεδου σχεδον Audio Technica ...αυτο ειναι ανθρωπινό τουλαχιστον για την τιμη του για τα αλλα μοντελα πραγματικα δεν εχω ιδεα .

Φιλικα
Σακης Πετροπουλος

 

[delamostre]

Μια ακόμη επιχειρηματική επανάληψη "αλητείας" περί ονόματος!
Ότι ακριβώς συμβαίνει και με τις παρακάτω τηλεοράσεις:

JVC - HITACHI - TOSHIBA - TELEFUNKEN - BLAUPUNKT - THOMSON

Ο Μήτσος σας παρέχει τεχνολογική τουρκο-κινεζιά σε τιμή χώμα!
Μνημόνια μέχρι να σβήσει ο ήλιος!
Αφού όλοι μασάνε, καλά κάνουν τα παιδιά....

 

[jjxx61]

να όμως τι άλλο κάνει . . .

Oι < Γάτες > προτιμούν technics !!!! όπως φαίνεται ξέρουν καλύτερα ........

 

[nikog72]

- να όμως τι άλλο κάνει . . .

Και μετά σου λέει : πωλείται mk2 σε άριστη κατάσταση. Σαν καινούριο

 

[SStelios]

Καλησπέρα σε όλους,
Συγγνώμη αν έχω κάνει λάθος και το μήνυμα μου πρέπει να μεταφερθεί αλλού.
Είμαι σε αναζήτηση πικάπ.
Τιμή μέχρι 300 και μετά αγορά μιας καλής βελόνας.
Σκέφτομαι την επιλογή σε κάποιο μεταχειρισμένο αλλά σίγουρα θα πρέπει να το πάω και για έλεγχο.
Σε μεταχειρισμένο σκεφτόμουν σε sansui.

Καμιά πρόταση ή συμβουλή παρακαλώ;
Ευχαριστώ πολύ