Have Cardmatic 121 Cards
I am new to this group, but also a 121 Cardmatic owner (plus many other tube testers), and mine seems to have a very large card inventory (takes several boxes to hold them all). My main interest is industrial and audio tubes, not TV tubes, so if anybody needs a specific card, I am happy to search for it, and send you the details, or the card if it's not one I require. Anybody got a full manual PDF available?
all the best,
walter
sphere research corp.
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