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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

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Old 12th Mar 2006, 12:28 am   #1
Danny
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Default 7ABP-33A tube

Hi all I have been looking for information on a GEC 7ABP33A CRT. I have bought a couple from a well nown supplier these are new 7"jobbies.

I was hoping to use one for my flying-spot scanner project but I need to know the base connections and data to proceed. They are very well made CRTs not the domestic grade of tube .

Thanks Danny

Last edited by Mike Phelan; 1st Jun 2007 at 8:06 pm. Reason: Readability
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Old 12th Mar 2006, 12:33 pm   #2
oldeurope
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Default Re: 7abp33a Tube

Quote:
Originally Posted by Danny
Hi all i have been looking for information on a GEC7abp33a crt i have bought a couple from a well nown supplier these are new 7"jobbies i was hoping to use one for my flyingspot scanner project but i need to know the base connections and data to proceed. thay are very well made crts not the domestic grade of tube .
Thanks Danny
Hi,
please show us a picture of this tube. I have some SONY SD130.
Kind regards
Darius
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Old 12th Mar 2006, 4:58 pm   #3
earlytv
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Default Re: 7abp33a Tube

http://tubedata.tigahost.com/tubedat...41/7/7ABP7.pdf
only screen phosphor different
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Old 12th Mar 2006, 6:09 pm   #4
oldeurope
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Default Re: 7abp33a Tube

Hi Danny and erlytv,
p33 phosphor is orange very long persistence.
For a flying spot scanner you need a p15 or p16 phosphor or something
very short.
I think P7 is a mixture of p33 and p16.
Your tube is good for sstv because you need no orange filter like
it is usefull at p7 for sstv use.

Kind regards
Darius
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Old 13th Mar 2006, 12:00 pm   #5
grindrod
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Default Re: 7abp33a Tube

I used a 7BP7 long persistance tube for SSTV years ago for both receiving and as a flying spot scanner. The blue emission is at least an order of magnitude brighter than the yellow afterglow so in practice it works fine as a flying spot scanner.

The afterglow is only really visible in a darkened room and generally didn't last long enough to view a complete SSTV frame so I used a Polaroid 'scope camera to capture images!

Hope this helps!

Martin
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