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MessagePosté le: Mer 9 Déc - 12:54 (2009)    Sujet du message: B&O sp1 Répondre en citant

Ayant trouvé montée d'origine une cellule B&O sp1 sur un porte cellule L70, je pensais que plus d'infos sur la cellule en question pouvaient vous intéresser:

Manfactured: 1958 - 1971
Designer: Erik Rorbaek Madsen
Colours: Silver

This was to be the first of a long line of B&O cartridges.

The same principle was to be used by all future B&O cartridges and was known as moving iron. A small cross shaped armature was positioned over 4 magnets, each wound with a coil and arranged in push/pull pairs. Movement of the armature caused induced current in the coils and this was then fed to the contacts on the cartridge.

In the SP range of cartridges, the actual stylus was removable but was attached to what appeared to be an outer shell of the cartridge. When this was removed, one could see the 4 magnets on the cartridge and the suspension of the armature. The actual standards for LPs had not been completely set in stone, and these cartridges had a tracking angle of 25 degrees. They were designed to work with the earlier ST arms.

Unlike later cartridges, the SP1 and 2 (the difference being that SP1 cartridges had a half inch mounting bracket for use in non B&O arms) could be specified with a number of different styluses suitable for various roles. There was provision for 78 rpm records which require a larger diameter needle. 12, 17, 25 and 75 micron diamonds could be specified.


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MessagePosté le: Mer 9 Déc - 12:54 (2009)    Sujet du message: Publicité

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MessagePosté le: Lun 14 Déc - 01:05 (2009)    Sujet du message: B&O sp1 Répondre en citant

I have had trouble with the tranlation, so I am replying to what I think that François wrote.

I had one of these cartridges around 1962. The cartridges came in two physical versions:
- With standard 1/2 inch mounts for most tone arms.
- Direct plug-in matching dedicated B&O arms.

I had the second version. B&O's arms were offered in two or even three lengths.

I did not like the arm. It did not have a good feel. The arm lift was too far from the stylus: it was awkward to use.
The arm was an early stereo design; thus, it had no skating compensation. It had nice gymbals, but the geometry was improper relative to the stylus tip.
So, I felt that the arm was designed more to be nice to look at rather than to be used.

I've felt that the push-pull design of the generator was very good. It was an improvement over the first stereo designs from Pickering and Goldring. B&O's version was like a little plastic marionette cross. This is not visible in the photos that F. posted. The "puppet cross" was held securely by the removable outer shell of the cartridge. Mine suffered from one or more workmanship defects which prevented proper clearance between the stylus tip, the plastic shroud, and the record surface. You can see the stylus extending from shroud. Nothing that I could do would compensate properly. It is a design that requires perfect alignment of the parts.

From listening, it was obvious that the cartridge design is a good one. Enough of these were sold in the USA to support the inclusion of one of the needles in aftermarket stylus catalogs. I felt that the arm and stylus were not well matched; the assembly jumped grooves. Later, B&O stopped supplying styli, so the owners of B&O cartridges, most of which were in dedicated setups of B&O cartridges in B&O arms in B&O turntables, all made to be used exclusively with each other, were simply out-of-luck with bad investments. Recently, a company in the USA has been manufacturing B&O needles again. But I already had a bad experience with not being able to repair an expensive B&O turntable with a defective design and no available retooled motors. With these experiences, to me, no matter how attractive, it was a brand to be avoided.
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MessagePosté le: Mer 30 Déc - 22:25 (2009)    Sujet du message: Re: B&O sp1 Répondre en citant

François a écrit:
Ayant trouvé montée d'origine une cellule B&O sp1 sur un porte cellule L70, je pensais que plus d'infos sur la cellule en question pouvaient vous intéresser:Manfactured: 1958 - 1971
Designer: Erik Rorbaek Madsen
Colours: Silver

This was to be the first of a long line of B&O cartridges.

The same principle was to be used by all future B&O cartridges and was known as moving iron. A small cross shaped armature was positioned over 4 magnets, each wound with a coil and arranged in push/pull pairs. Movement of the armature caused induced current in the coils and this was then fed to the contacts on the cartridge.

In the SP range of cartridges, the actual stylus was removable but was attached to what appeared to be an outer shell of the cartridge. When this was removed, one could see the 4 magnets on the cartridge and the suspension of the armature. The actual standards for LPs had not been completely set in stone, and these cartridges had a tracking angle of 25 degrees. They were designed to work with the earlier ST arms.

Unlike later cartridges, the SP1 and 2 (the difference being that SP1 cartridges had a half inch mounting bracket for use in non B&O arms) could be specified with a number of different styluses suitable for various roles. There was provision for 78 rpm records which require a larger diameter needle. 12, 17, 25 and 75 micron diamonds could be specified.




Bonsoir François,

Je viens de récupérer une vielle platine sur laquelle se trouve la même cellule.
Ne l'ayant pas encore remise en fonction ,quelles sont les qualités de cette B&O ?

Cdlt,

Marc
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MessagePosté le: Lun 4 Jan - 08:14 (2010)    Sujet du message: Re: B&O sp1 Répondre en citant

edmontus a écrit:
Bonsoir François,

Je viens de récupérer une vielle platine sur laquelle se trouve la même cellule.
Ne l'ayant pas encore remise en fonction ,quelles sont les qualités de cette B&O ?

Cdlt,

Marc

Marc,

Aucune idée du rendu de cette cellule.
En fait, j'ai créé cette filière uniquement parce que j'ai trouvé cette cellule montée d'origine sur un porte cellule L70.

hats off
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MessagePosté le: Mar 12 Jan - 13:32 (2010)    Sujet du message: B&O sp1 Répondre en citant

edmontus a écrit:

Là c'est le rêve , je n'en crois pas mes oreilles ,,,,cette SP1 joue superbement bien , certe elle ne monte pas très haut mais sur le disque A ARTE de Baden powell la guitare est d'une véracité telle que le lecteur de cd fait grise mine Mr. Green .
Trois disques écoutés et trois scènes sonores différentes et les qualités d'enregistrements sont rendu a leurs juste niveau.

Un complément d'écoute est necessaire pour se faire une idée plus complète mais la cession d'hier laisse présager du meilleur pour la suite.... hats off


Marc,
Comme tu nous fais des éloges de cette B&O sp1 dans ton fil sur la Perpetuum, je pensais qu'une petite citation de tes propos dans ce fil de discussion s'imposait Wink

hats off
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MessagePosté le: Mer 20 Jan - 21:47 (2010)    Sujet du message: B&O sp1 Répondre en citant

François a écrit:



Marc,
Comme tu nous fais des éloges de cette B&O sp1 dans ton fil sur la Perpetuum, je pensais qu'une petite citation de tes propos dans ce fil de discussion s'imposait Wink

hats off



Finalement, après comparaison ma vielle Ortofon SL15 ELL sur le même bras fait mieux sur beaucoup de critères.

A tempérer donc Sad Exclamation

Marc bow
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MessagePosté le: Lun 15 Fév - 15:49 (2010)    Sujet du message: Cellule SP1 Répondre en citant

Bonjour,

Juste pour savoir si l'on peut avoir les diamants pour cette cellule SP1 de B&O.
Je suis équipé de ce type de cellule sur une platine GARRARD made in SWEDEN de 1957.
La tête porte cellule se démonte et pour l'époque le son est formidable.
Je voudrai également équipé cette tête de LENCO B30 de 1959 de la même cellule (ctuellement équipée d'une ronette LENCO)
Qu'en pensez vous, et ou me procurer ce type de cellule ?
Cordialement
DOM








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MessagePosté le: Ven 19 Fév - 18:45 (2010)    Sujet du message: B&O sp1 Répondre en citant

Bonsoir Dom,

Je pense avoir vu dernièrement sur ebay un diam de rechange pour SP1 et autres.
Perso je n'en sais pas assez sur cette B0 pour te conseiller Sad .

Bon weekend,

Marc hats off
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MessagePosté le: Mar 23 Fév - 01:07 (2010)    Sujet du message: B&O sp1 Répondre en citant

Dom wrote:

Code:
I would like also equipped with this head LENCO B30 1959 from the same cell (urrently equipped with Ronette LENCO)
What think you, or get this type of cell?

Citation:
Je voudrai également équipé cette tête de LENCO B30 de 1959 de la même cellule (ctuellement équipée d'une ronette LENCO)
Qu'en pensez vous, et ou me procurer ce type de cellule ?


Dom, I am not clear whether you are asking about the B&O or the Ronette. So, I'll say something about both.

B&O:
An excellent concept and a very fine-performing design (I had one many yers ago).
However, for various reasons, I feel that a currently-manufactured cartridge in the proper high tracking force range would be a better investment. These would be products from Ortofon, Stanton, and Audio-Technica.

Ronette:
This is interesting because of its historic authenticity. Originally from Holland, I believe that these cartridges (or facsimiles) are now (or were) being manufactured in Japan. Styli were very well established on the market. (I even have a few that I can sell.) You can also substitute for the Ronette with a similar one from VACO (also Japanese). They look different when viewed from underneath.

I recall these as heavy trackers (as most piezoelectric cartridges were in that period): 6-8 grams. This means that they are fun, but I think a bit nasty on the LPs. They may be quite nice on 78s. Piezoelectric cartridges mate very well with popular non-hi-fi amplifiers from the period.

With a one or two additional cheap electronic parts, these cartridges can usually be connected to spare high-level inputs of modeern solid-state amplifiers. And similarly, they can be plugged into magnetic cartridge inputs with the appropriate resistors/capacitors).

All piezoelectric cartridges were not the same! There were more of them than there were magnetics. They differed in a few different superficial ways such as shape and cosmetics! A few were even styled to mimic magnetics. Some won't fit in certain arms. They differed in compliance, force, and output voltage. Therefore, matching to one's electronics can be an issue. I'd think that Lenco's original choice would have been a "middle-of-the-road" or better implementation of the concept. One of our current or former Lenco people, from Holland, had a decent range of literature on this brand.

By the way, I have saved (and even recently bought!) a few piezoelectric cartridges, including three versions by VACO, as well as their styli. I don't intend to use these for LPs except records that I don't care about, but they'll be interesting to try for 78s. So, they're strictly curiosity for the future. It's interesting to remember that crystal and ceramic cartridges were what most people in the world used to listen to!
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MessagePosté le: Mer 15 Sep - 10:34 (2010)    Sujet du message: B&O sp1 Répondre en citant

Un document d'époque.


http://www.carlobramantiradio.it/wlow artucciaperpetuum.jpg
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MessagePosté le: Mer 15 Sep - 17:04 (2010)    Sujet du message: B&O sp1 Répondre en citant

compliance de 4.5 ---> optimum pour un bras L75 ...
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MessagePosté le: Mar 28 Déc - 12:16 (2010)    Sujet du message: B&O sp1 Répondre en citant

Francois 


the B&O is a very nice sounding cartridge very similar to the Shure M3D to my ears ..... bought a 70 heashell that had one mounted in sounded really good .....do wish i hadnt sold it  Crying or Very sad
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