17 Jan
2010
17 Jan
'10
11:26 a.m.
On 17 Jan 2010 at 18:40, Tony Duell wrote:
3) There is resistor in parallel with the regulator.
MITS did this routinely and it wouldn't surprise me if they did this
on the 680. In particular, I remember that the +5 supply for the 4K
DRAM boards had this dirty little trick. Anything, I suppose, to
shave a few dimes off the manufacturing cost.
Everything's fine with a full load, but if the load should drop for
any reason, any IC connected to the regulated (?) line were toast.
--Chuck