[Boatanchors] 4 or 5 color band carbon resistors

[Yong Surk Lee/HL1FB]

Hello
   I have a lot of 1/2 watt old carbon resistors. Some of them has 4 color bands
and some has 5 color bands. I know the 4th color band is the tolerence. 
what does the 5th one represent? I have an old tube radio made in 1960s. It uses
4 band carbon resistors. What year did the 5 band ones introduced? 
YSL


_______________________________________________
Boatanchors mailing list
Boatanchors at mailman.qth.net
http://mailman.qth.net/mailman/listinfo/boatanchors
** List Administrator - Duane Fischer, W8DBF/W9WZE **   
** For Assistance: dfischer at usol.com **         
$$ For vintage radio info, see the HCI web site $$      
http://www.w9wze.org