[R-390] Resistors and capacitors in audio

[Don Reaves]

This is an interesting reference site for resistors, published by a group
of University Technology of Eindhoven engineers in the Netherlands.

http://www.resistorguide.com/types/

I learned that carbon comp resistors can change 10% in value just sitting
on a shelf in a years time.  This explains the huge value shift in my NOS
carbon comp resistor hoard that I kept from my Dad's Radio-TV shop back in
the 70s.  The color codes now mean nothing.

I started a new hoard of freshly minted carbon film resistors, because they
are rated at 500 volts, are dirt cheap and they look better in a radio than
a metal film type.

Don