Posted by JoeBloe on 01/05/07 13:24

On Fri, 5 Jan 2007 08:11:07 -0000, "M.I.5?"
<no.one@no.where.NO_SPAM.co.uk> Gave us:

>
>"JoeBloe" <joebloe@thebarattheendoftheuniverse.org> wrote in message
>news:gparp2t4rbmfg2952ucgiqcq4853263cc5@4ax.com...
>> On Thu, 04 Jan 2007 10:05:13 -0600, chrisv <chrisv@nospam.invalid>
>> Gave us:
>>
>>>JoeBloe wrote:
>>>
>>>>LD is too huge, too bulky, and it presents the hardware designers
>>>>with too many technical hurdles to make good gear for it. The wobble
>>>>at the edge of a twelve inch platter can be huge.
>>>
>>>Too bad that the market didn't go for the "needle and groove" video
>>>disk that RCA tried to make work, eh?
>>>
>>
>> That's not what it was.
>>
>> It was a capacitive pick up stylus. No needle at all. No groove.
>>
>> http://en.wikipedia.org/wiki/SelectaVision
>
>The 'needle' is just a synonym for a 'stylus' left over from the 78 era.

Wrong. He specifically stated "needle and groove".

There is NO needle, and there is most certainly no grooves.

>Selectavision used a stylus riding in a grove.

Nope. The "stylus" retrieved data from a capacitive pickup.
No groove. No needle. No little bumps to read.

> The stylus was long enough
>that it only travelled along the crests of the undulations in the grove. It
>read those undulations, as you note, capacitively.
>
>So it had a grove and it had a needle or stylus. Its just that the stylus
>didn't look anything like what most people would recognise as a needle.
>
Were you there, or are you speaking from your wikified edjumecation?

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