Re: Mullard Valve Tester Card Project
Hi Robot, plenty of details of all the cards issued (and numbers not issued) in this section of the forum.
I believe GMB of this forum did most of the work. There was also a design published for a card punch, so you could manufacture your own cards. The material (approx. 1mm thick SRBP) is still available, but other alternative insulators have been suggested.
Ed
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