All is well again

[Crawdad]

You guys have your hands full over there, we will keep pushing the buttons on our end so you can tell when It starts working..........


View attachment 63768

I worked in quite a few panels that resemble that one. Nothing like craftsmanship, is there?

 

[snippits75]

You guys have your hands full over there, we will keep pushing the buttons on our end so you can tell when It starts working..........


View attachment 63768

LOL

At least the rats have left the nest!

 

[Shadetree Mechanic]

I worked in quite a few panels that resemble that one. Nothing like craftsmanship, is there?

Like when there are no prints, and you have to tug every wire to see where it goes. Then scribble something on a piece of cardboard so you can remember what is what.........

 

[Crawdad]

Like when there are no prints, and you have to tug every wire to see where it goes. Then scribble something on a piece of cardboard so you can remember what is what.........

And The Craftsman said "what are wire markers and ty-wraps?".

On one such occasion it was actually quicker to gut it and rewire the damn thing rather than troubleshoot.

 

[Crawdad]

"You want what?.........a drawing? Hahahahaha!"

 

[Shadetree Mechanic]

"You want what?.........a drawing? Hahahahaha!"

Or, if it has a PLC: "the program is the prints".

 

[Shadetree Mechanic]

 

[undertaker]

Hold my beer and watch this!!!!

 

[nomadradio]

Hmm. Worldwide yo-yo Forum? Went back to the "502" screen a little after midnight Mon 5/15, came back 15 minutes later.

Better than not coming back at all, really.

73

 

[AudioShockwav]

It has been a problem for a couple days, Tim has been working on the Issue.
It's solid so far today.

Knock on wood.

73
Jeff

 

[TM86]

If you guys need more chewing gum or bailing wire, just say the word.

 

[Shadetree Mechanic]

Race condition - Wikipedia

en.m.wikipedia.org

 

[TM86]

Race condition - Wikipedia

en.m.wikipedia.org

View attachment 63801

From the brief description I saw in another thread, it sounds like it could be a Heisenbug.

 

[Shadetree Mechanic]

From the brief description I saw in another thread, it sounds like it could be a Heisenbug.

Ohhh, that's a good one.

Heisenbug - Wikipedia

en.m.wikipedia.org

 

[Handy Andy]

Or you didn't terminate your lines...

Just so some people know, the CMOS/MOS gating functions do not run any sort of termination.

So selection of the logic input impedance - it is set by the boards own I/O termination resistor - per line - if any is used.

Nowadays, with the proliferation of so many clones and copycats, the subjective effort to "Tune" the input and output to sync with a ringing effect to augment the clocking drivers back then in the TTL to what we use today - that art of echo and termination - seems to have been lost.