teletext adapter

discuss both original and modern hardware for the bbc micro/electron
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denni505
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teletext adapter

Post by denni505 » Thu May 15, 2014 7:57 pm

hi just a quick question are the teletext adapters any good or use has it has been turned off asking due to get my hands on one form a friend

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flynnjs
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Re: teletext adapter

Post by flynnjs » Thu May 15, 2014 9:00 pm

No analogue TV in the UK any more so no VBI teletext either.

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aerworuld
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Re: teletext adapter

Post by aerworuld » Thu May 15, 2014 9:03 pm

Dont chuck it out though!

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denni505
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Re: teletext adapter

Post by denni505 » Thu May 15, 2014 9:33 pm

thanks for the info so its useless then no good

RobC
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Re: teletext adapter

Post by RobC » Thu May 15, 2014 9:52 pm

Makes a great case + PSU for a new ARM TDMI or FPGA 6502 co-pro.

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denni505
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Re: teletext adapter

Post by denni505 » Thu May 15, 2014 10:19 pm

were do you get them them from
RobC wrote:Makes a great case + PSU for a new ARM TDMI or FPGA 6502 co-pro.

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SimonSideburns
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Re: teletext adapter

Post by SimonSideburns » Fri May 16, 2014 10:39 pm

Only thing it's good for nowadays is to try to extract old teletext from S-VHS tapes. Bog standard VHS is not good enough quality but S-VHS was supposedly better.

If you've got any old S-VHS machines and stuff that was recorded off the telly, you may be in luck trying to get the teletext off.

I've never heard of anyone actually achieving this with the Teletext Adaptor, but certainly on old tellys they got teletext to display on screen.
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Re: teletext adapter

Post by duikkie » Sat May 17, 2014 7:33 am

try to sell or give to people in counrty's that still got teletekst :)
in holland we still have teletekst :)
SimonSideburns wrote:Only thing it's good for nowadays is to try to extract old teletext from S-VHS tapes. Bog standard VHS is not good enough quality but S-VHS was supposedly better.

If you've got any old S-VHS machines and stuff that was recorded off the telly, you may be in luck trying to get the teletext off.

I've never heard of anyone actually achieving this with the Teletext Adaptor, but certainly on old tellys they got teletext to display on screen.

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flibble
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Re: teletext adapter

Post by flibble » Sat May 17, 2014 12:11 pm

I've wondered, given the mothballing of analogue teletext, what has become of all the hardware to create the pages and encode them into analogue streams?

Maybe we should be looking into generating our own signals with teletext in :)

Anyone know any TV techies who might know more?

s1paulr
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Re: teletext adapter

Post by s1paulr » Sat May 17, 2014 12:34 pm

You could always have a go at making your own VBI teletext inserter. Here is a circuit:

http://vbit.googlecode.com/files/vbit-3.pdf

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aerworuld
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Re: teletext adapter

Post by aerworuld » Sat May 17, 2014 4:38 pm

flibble wrote:I've wondered, given the mothballing of analogue teletext, what has become of all the hardware to create the pages and encode them into analogue streams?

Maybe we should be looking into generating our own signals with teletext in :)

Anyone know any TV techies who might know more?

Wow, we could have an Acorn dedicated broadcast!

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mjforbes
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Re: teletext adapter

Post by mjforbes » Sat May 17, 2014 6:15 pm

aerworuld wrote: Wow, we could have an Acorn dedicated broadcast!
Complete with telesoftware? :)
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BeebMaster
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Re: teletext adapter

Post by BeebMaster » Sat May 17, 2014 7:03 pm

My experience of retrieving Teletext pages from Super VHS tapes is pretty lame, I recorded a dozen or so tapes in 2009 just as the Granada region analogue was being turned off. (I was able to record the actual moment when BBC-2 went off.)

Sadly I've never been able to get any decent Teletext pages loaded from my SVHS tapes.

Teletext adapters can still be used to display saved Teletext pages (although just as easily they can be loaded as a mode 7 screen).

On cable, quite a few channels still carry Teletext subtitles which you can call up with a Teletext adapter on page 888. The newer boxes don't have an RF output any more so it would have to be done by passing the scart signal through some other box with RF, like a VCR.

And yes, they could be given a whole new lease of life if somebody has the kit to insert Teletext into a TV signal.
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flynnjs
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Re: teletext adapter

Post by flynnjs » Sun May 18, 2014 9:27 am

And yes, they could be given a whole new lease of life if somebody has the kit to insert Teletext into a TV signal.
I envisage a Teletext VPN on the internet where people
have USB adapters to gateway back to the analogue VBI
world. 8)

(puts on list of jobs to do :mrgreen: )

johnha
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Re: teletext adapter

Post by johnha » Tue May 20, 2014 1:22 am

Hi All,

I have an interest in acquiring an original (unmolested) cheese wedge Teletext adapter, preferably one that was known to work.

If anybody has one they want to part with, please let me know.

John.

johnkenyon
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Re: teletext adapter

Post by johnkenyon » Tue May 20, 2014 5:42 pm

johnha wrote:Hi All,

I have an interest in acquiring an original (unmolested) cheese wedge Teletext adapter, preferably one that was known to work.

If anybody has one they want to part with, please let me know.

John.

I've got one (Coventry/Rugby area, with occasional forays further afield).

/John

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