5 Mar
2004
5 Mar
'04
5:47 p.m.
Andy Holt wrote:
One further catch if you are building a tape reader
... or doing a "radical
rebuild"* on a very old design: make sure that the power to the light source
is reasonably well smoothed ... an AC ripple here can lead to mysterious
inconsistencies when trying to read tapes :-)
Bring in the heafy 12 volt power supply and bulb. :)
* before Tony is inclined to accuse me of vandalism
here, I'll mention that
this "rebuild" took place 20 more than years ago when I acquire a couple of
old (then!) ex-mainframe tape readers and converted most of the electronics
from discrete (which I didn't understand) to TTL (which I could get to work)
to interface to a home-brew 6800 system.
So where does one get a punch cheap too???
Ben.