I worked in quite a few panels that resemble that one. Nothing like craftsmanship, is there?
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All is well again
- Thread starter AudioShockwav
- Start date
Shadetree Mechanic
Delaware Base Station 808
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.
Shadetree Mechanic
Delaware Base Station 808
Or, if it has a PLC: "the program is the prints".
Shadetree Mechanic
Delaware Base Station 808
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
Better than not coming back at all, really.
73
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
It's solid so far today.
Knock on wood.
73
Jeff
Last edited:
Shadetree Mechanic
Delaware Base Station 808
From the brief description I saw in another thread, it sounds like it could be a Heisenbug.
Shadetree Mechanic
Delaware Base Station 808
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.
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.
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