1991 200 TQ 20 valve radio

["Dave Puterbaugh" <deputer@email.msn.com>]

My friend that bought my car has started to learn the pleasures and pain of
the Audi Gods.  He loves the car, and can barely drive it at sane speeds.
however, the original radio just died.  The knob to turn the radio on no
longer functions.  My questions are;

Is this a Delta, a Gamma, or what type radio?

Is there a good stock Audi radio to replace this?  I thought someone said to
use a later 100 radio recently.

Does anyone know the cost of a refurbished Audi radio, from someone like
Carlsen's?

Does anyone have a good used radio for sale that was replaced by an after
market unit, and how much?

Thanks from a former Audi pilot who is now driving a Chebby Subdivision for
a while.

Dave Puterbaugh
deputer@msn.com