On Sat, 12 Jun 2021, Tony Duell via cctalk wrote:
In both cases it would require an input pin to become an output,
something that I can't see how it would happen.
I wonder if in the original list, a '1' was misread as a '7' or vice
versa. I am told that in some countries the '7' is conventionall
On Sat, Jun 12, 2021 at 12:39 AM Jon Elson via cctalk
wrote:
>
> On 6/11/21 3:22 PM, Santo Nucifora via cctalk wrote:
>
> The 74151 is an 8:1 multiplexer with complementary outputs.
>
> The 74157 is a quad 2:1 mux.
>
> I can't imagine any defect that would cause one to test out
> as the other.
In
Hi!
Dragged out my old Compaq DAT tape drive and although it powers up some
of the rubber wheels have turned to goo. Since I don't have any reason
to fix it I thought I'd offer it here for shipping. Compaq 3000 series,
this is a 199527-003, rebadged HP tape changer.
It got a 10 tape capacity
On 6/11/21 3:22 PM, Santo Nucifora via cctalk wrote:
The 74151 is an 8:1 multiplexer with complementary outputs.
The 74157 is a quad 2:1 mux.
I can't imagine any defect that would cause one to test out
as the other.
Jon
Thank you for the quick reply. As soon as you wrote that, I checked my
list again and I have two entries for 74151. The other is 2392121 which I
assume is the right one?
Would you mind sharing your list? I can cross-reference and see how
accurate mine is.
Thanks again,
Santo
On Fri, Jun 11, 2
My reliable list says your cheap logic tester is right 1582601 = 74157
Paul.
On 2021-06-11 5:22 p.m., Santo Nucifora via cctalk wrote:
I am currently working on an IBM 5100 that has some issues. I know for
certain that the 5100 has a bad graphics controller card so I need to dig
into component
I am currently working on an IBM 5100 that has some issues. I know for
certain that the 5100 has a bad graphics controller card so I need to dig
into component level replacements for those ICs I can replace. I have a
list of logic chip equivalents to the IBM part numbers that are written on
the chi
