is the "challenger"name a rebuild from channel master a few years ago..?
i think this is correct..(the one listed on e-bay).
which brings up the orangish phosphor thing,charlies set has the 21cyp22A which looks very "red",interesting to see who has a set with a 21cyp22..(not the "A" version)..
sorry to bring this subject up again..
hehe
terry