USSR made storage tubes (CRT memory)

[UMMR]

Hello,
here is a picture of two USSR-made electrostatic storage tubes, like the more famous RCA Radechon (6499), LN-8 (rear) and LN-5. These tubes have been used for years in ground MTI (Moving Target Indication) radar systems owned by several countries of the former Eastern Block. They are in fact a sort of CRT-based memory for both analog and digital signals. The capacity was no more than 1/1,5 kbit.
Added a dedicated page to my website: http://ummr.altervista.org/storage_tubes.htm.
Paolo

[Glory_Cloud]

Nice!

[monoxrom]

UMMR how do you know that this is a memory?

And please tell me the model of this tubes. I want to find tube memory long time

[UMMR]

Hi,
in fact there are few infos online about electrostatic storage (memory) tubes. The most known is the RCA-made Radechon (6499). The USSR-made LN12 is listed as a storage tube here: http://www.tubecollector.org/ln12.htm. The internal construction is very similar to that of the Radechon. The internal organization of a typical barrier-grid storage tube is described here: http://www.alcatel-lucent.com/bstj/vol34-1955/articles/bstj34-6-1241.pdf. And, last but not least, this is a very nice article about memory tubes: http://ed-thelen.org/comp-hist/TubeCollector-.pdf. In my website http://ummr.altervista.org/storage_tubes.htm I added some reference to articles (sadly not all available online) concerning the use of LN- series tubes as a computer storage.
Paolo

[UMMR]

[monoxrom]

UMMR
Thank's fir info. I was forgot about this topic

Do you think this is it?
http://aukro.ua/trubka-13ln11-i2533291843.html
(LN-13 here)

[UMMR]

[berni]

The Russian *LN* type CRTs are all storage tubes.
There are types with screen for viewing (e.g. for analog storage scopes) like in the Ukrainian auction and types for electronic readout like shown in the pictures above (mostly used in radar equipment to "substract" the static elements from a scan.

Berni