I know that Unique Radio Parts closed up shop  a couple of years ago, but 
they used to sell filter cap boards + caps to  replace the can caps in the 
R-4 series and 2B receivers.  

Does anyone have a mask or template of the actual  board(s) that I could 
use to etch my own one-off PCBs to replace the cans in a  2B and an R-4?  I 
understand that we're no doubt talking about two  different PCBs for the two 
receivers.
 
    Also, does anyone know of a source of the blue  light-filtering 
material for the R-4 series dials?
 
    TNX in advance.
 
    73/arf,
 
    Paul, K4MSG
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