[Hallicrafters] Dur-Paper

[carolew]

Has anyone heard of a type of capacitor called a Dur-Paper capacitor? I just got
a Hammarlund (heresy, heresy) HQ-180 and it has several dur-paper caps in values
of 0.1 mfd and 0.047 mfd. Once I get around to working on it, I will replace
them as I would any other paper caps. However, when I saw the dur-paper
designation in the parts list, I got curious. I ran a Yahoo search but came up
with nothing.

Joe Connor