Hello Bob,
I have hundreds of '73-04.  I use them HS designs and they always work
great.  I just program them as HS parts.  If you have never heard of this
it goes like this.
The die for all parts starts out with the oscilator fuses at 0.  When you
buy a 20MHz device all you are paying for is the fact that they tested it
at 20 MHz and pre-programed the fuses.  I have friends who have done
100,000 parts this way and had less then 10 parts fail.  I have been doing
this for years with no problems.

You ever wonder how the JW works with its re-programable oscilator? Same
thing.

Good luck.

Take care  -Jim Hobbs

> I need a source of PIC16C73A-20 OTP DIP chips.  I need eight chips now
and
> will probably be looking for 100 more in about a month.  DigiKey appears
to
> be out of stock.  I can probably use the PIC16C73-20 chips if someone has
a
> supply of them on hand.
>
> Can anyone point me to an off the shelf source for either of these chips
???
>
> Bob Segrest