Tektronix T5640 Direct-view bistable storage tube

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Tektronix T5640 Direct-view bistable storage tube

Postby Harry Dalek » Fri Jun 19, 2020 12:02 am

I was going to mention this again on my last project page but i am interested in what the hell this CRT i have is so starting this for a Chat and who knows where it will end and don't want to bore those not interested .
https://vintagetek.org/articles-and-scans/

Doing some research on the Tektronix T5640 after reading what i found i have some questions later on it

What it is below
............Part No 154-0418-00 Name T5640-201 Phosphor P201

Link to the Hunt for information

http://w140.com/tekwiki/wiki/T5640

Below is a simple drawing of my CRT wow that's different on any thing i have ever looked into .

1280px-T5640-schematic.jpg


Now i looked into the internal graticule it does have a line i can't see a grid that might of just been some plastic screen i would think this was a scope tube may be with Storage memory ? ..i am not to bothered about

800px-T5640_2.jpg


Now a Question more than likely Steve you can answer P201 Now i know the P is for phosphor and the number after time in seconds ,Tektronix seems to have a different code 201 ?
EDIT............i just found this ( it can hold the trace for an hour after its been written to the screen ! it says due to its 2 screens it can either be used as a normal scope screen or as a storage screen...in our case of interest this thing might be able to do both SSTV and NBTV depending on what you use...how this is done needs more research.
https://archive.org/stream/tektronix_56 ... jvu.txt....
1963 boy you were right there Steve ...if i got it right you can write and erase to the screen sounds like a great idea for sstv !
5640 in the below pdf
Tek-CRT-History-Keller-Oct-2007-Pt5.pdf
(6.71 MiB) Downloaded 83 times

The flood gun is new to me first i have heard of it see pdf below
Attachments
Storage-Story-TekTalk-Spring-1966.pdf
(11.85 MiB) Downloaded 99 times
Last edited by Harry Dalek on Fri Jun 19, 2020 3:57 pm, edited 2 times in total.
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
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Harry Dalek
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Re: Tektronix T5640

Postby Steve Anderson » Fri Jun 19, 2020 12:57 pm

Ah yes. I'd forgotten about these more exotic devices - and there were quite a few variants, often for very specialised applications. I don't think I'd have a go at firing up, it needs a lot of support voltages and electronics. It's so much easier to use RAM these days. Just as I did in the SSTV-625 up-converter a few years back - which reminds me, I must get back onto the MkIII version...when?...good question!

Steve A.
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Steve Anderson
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Re: Tektronix T5640

Postby Harry Dalek » Fri Jun 19, 2020 4:24 pm

Steve Anderson wrote:Ah yes. I'd forgotten about these more exotic devices - and there were quite a few variants, often for very specialised applications. I don't think I'd have a go at firing up, it needs a lot of support voltages and electronics. It's so much easier to use RAM these days. Just as I did in the SSTV-625 up-converter a few years back - which reminds me, I must get back onto the MkIII version...when?...good question!

Steve A.


Yes i had never heard of the Direct-view bistable storage tube little did i know i had one in my shed . interesting looking at one working in the video !
Flood564 Mod 121N.pdf
(36.33 MiB) Downloaded 81 times

Yes life sort of gets in the way of projects sort of when you can on the converter every one i am sure is still interested


youtu.be/QkcVwRKy6Jk

youtu.be/xQfSJeARRpM
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
User avatar
Harry Dalek
"Fester! Don't do that to 'Thing'"
 
Posts: 4427
Joined: Fri Sep 26, 2008 4:58 pm
Location: Australia


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