This 'part number spam' is common for just about any electronic part number ever published in the last 50 years. I see it when searching for vintage semiconductors, milling machine controllers, display tubes, whatever.

I assume that there's some hidden economy of pay-per-click that causes this corner of the Web to exist. It certainly has nothing to do with actually selling any of the parts listed on the sites.

A similar curiosity is that just about any part number made in the last 50 years will have some Alibaba page claiming that they have a bunch of that part available. This is for parts that I know were never made in quantity, ever, like the custom IGBT module from the custom Italian motor controllers put on our telescope in 2002. Again, money is made, but not from a happy customer.


On 2/29/2016 2:36 PM, Jonathan F. wrote:
Since i'm always looking for nixies for my collection, i often see websites,
Nixies in Stock, but declared as "ELECTRON TUBES" along with alot of strange
numbers and texts and sometimes in very large quantity like "340pcs"..
I only can locate these sites when searching for eg. "B-5991" tube...
If you request a price, you mostly don't get an answer or a text like "could you
provide more info, we can't locate the part", but have it listed on their page 
??!

For example:
http://www.csgparts.com/part_nsn/B5991/


Does anybody know whats going on there? Are those sites running on old databases
or just listing parts to get views or something?

(Sorry for not knowing this, i'm relatively new to collecting nixies).


--
David Forbes, Tucson, AZ

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