Hi Darius,
Good news and bad news. The bad news is I have no literature on those tubes. The good news is I have the following tubes that might fit : 7tp4 ( RCA TK 111 viewfinder CRT) , 7bp4 ,10sp4 ( RCA TK111 CCU ), 9lp7. Condition unknown but all have good getters at least. My crt tester isn't working right now, but I can probably get it running. The 7bp4 ( Dumont ) , 10sp4 ( RCA) are new old stock. The 10sp4 is definately shorter than a 10bp4.
I have some 5 inch , but suspect that they would be generally too small.
And I'd like to try and find a set that needs a 5Ap4 or 1802p4 for my collection.
The 7tp4 and 10sp4 are aluminised. The 7tp4's have a very slight ion burn to the screens.
Might someone on the list have info on these types ?
And how to post pictures? I'm a bit of a fossil when it comes to things like that.
I'd give getting the tester going a shot if any of these types is of if interest. The price for any of them would be not much more than the cost of good packing and shipping. Better they get used than sitting another 15 years in the attic.
Best Regards !
Bob Hodge
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