#: 13672 S1/General Interest
    25-Dec-91  21:41:17
Sb: #13660-Dead CoCo3
Fm: Erich Schulman 75140,3175
To: Steve Wegert 76703,4255 (X)

I am definitely going to replace the 6809.  Whether I will be at all successful
is another matter.  Only a quick look at the top of the board confirmed Marty
Goodman's admonishment to be extremely careful so as to not damage the traces. 
My small-tip 15-watt soldering pencil will help; I used to only have a big-tip
30-watt which is fine for amplifiers and my all hollow state (i.e., all vacuum
tube) oscilloscope that I almost have working at original specs.  This CPU
replacement is by a wide margin my most difficult to perform hardware job that
I've ever considered attempting. I do feel up to the job but I am not going to
keep my hopes up on this. I still remember my first attempt to build a 2-watt
amplifier not to mention the 317 volt zap I got from the plate of a tube in
that 'scope (could have been worse, the correct voltage was 360 +/-15%).  I've
already read about replacing the 6809 with a socket so I already had that
planned.  My "policy" is to always do that except in UHF and similar where a
socket would significantly alter the circuit.