HP CRT mould update

[J. David Bryan]

On 18 Apr 2005 at 15:40, Vintage Computer Festival wrote:

> HP CRTs (especially the elongated ones found on the mentioned machines)
> seem to be more typically susceptible to this effect than other CRTs. 
> I wonder what it is about them? 

They were all made by Clinton Electronics of Rockford, Illinois?

I have an HP 2640A, a couple of 2645As, a 2647A, and two 64000s; all have 
spots to varying degrees, and all of the tubes were made by Clinton.

Any chance your ADM 3A tubes have Clinton stickers on them?

                                      -- Dave