Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
Cubdriver:
--- Quote from: mnementh on June 27, 2022, 01:23:55 pm ---That is effing amazing, Pat. What is the sampling "gate" time on that thing? Somewhere between .75 and 2 seconds it looks? Does not appear to be exactly fixed duration, either...
--- End quote ---
I'm not sure what the sampling rate is exactly - as it seems to be functional I haven't delved too deeply into the actual operation (and don't have a correct schematic for it, either, just one for a similar unit, and it's a scan that I haven't pasted together yet). Plan to figure it out in the future, but for now am mainly concerned with getting it back to basic functionality with the display in good nick. Its speed may also be affected by the fact that I backed the return spring tension on the stepper relays to just about the minimum they can be set to in my initial troubleshooting in order to get them to index reliably - once the lubrication gets around and they're fully freed up, cranking that up may put a bit more spring in their steps and make them faster.
--- Quote ---Ooooooh... you know something, Pat... they make LED dash panel bulbs in that base... >:D
--- End quote ---
I did at least briefly consider the LED replacements as some showed up in my searches for the replacement bulbs.
--- Quote ---No, wait... before you go looking for the lynching rope, hear me out.
--- End quote ---
And I'd just sharpened my pitchfork, too. Never get to have ANY fun... :'( :-DD
--- Quote ---Those 328 bulbs are rated 6V; that means the unladen voltage is probably more like 7-8V. Should still be plenty for a 12V LED bulb. But here's the thing... running at considerably less current than those filaments, iffy contacts become much less of a problem, so might help in the long run.
And as a bonus... you can change the color... could have that luscious Emerald Green they're making now... or that deep pigeon's blood red like those old HP gear with the Siemens (I think?) LED displays... or even orange to match all your nixies. ;D
mnem
--- End quote ---
I decided to stick with the tried-and-true filament lamps for a couple of reasons. Mainly because I know they'll work as their ilk have been in there for literally decades and only a few have failed, so they're the simplest, known good option, still readily available and relatively inexpensive - found the four packages of ten, NOS, on eBuy for less than $30 shipped. Secondarily because I know the displays are designed for the filament lamps, which emit light in all directions, whereas LEDs *might* be more directional - this may or may not be a factor, but is likely also very dependent on the particular LED, and because the lamps are spaced across the bottoms of the indicator plates, that could be a factor in whether they illuminate evenly or not. Thirdly, because I haven't checked whether they're fed AC or DC and if DC what polarity, and didn't bother to measure. Fourthly, I'd need like 42 of them to do the whole display, and it seems that those that are not from sketchy sources are at least a buck a pop. In the end, my laziness won out and I stuck with the original part. They were briefly in contention, but lost out to the sure thing.
-Pat
dl6lr:
--- Quote from: Neper on June 27, 2022, 03:02:10 pm ---
--- Quote from: mnementh on June 27, 2022, 02:21:54 pm ---
--- Quote from: tggzzz on June 27, 2022, 02:08:00 pm ---
--- Quote from: Cerebus on June 27, 2022, 12:30:50 pm ---
--- Quote from: tggzzz on June 27, 2022, 09:52:25 am ---... 2400nm was unarmoured, 300nm armoured. ...
--- End quote ---
I don't think 2.4 micrometres of armour is going to make much difference. >:D
--- End quote ---
Sigh. The other nm in common use all around the world, i.e. not just USA.
But you knew that :)
--- End quote ---
So newton-metres then...? >:D
mnem
:popcorn:
--- End quote ---
Nautical miles?
--- End quote ---
Never mind...
AVGresponding:
--- Quote from: dl6lr on June 27, 2022, 06:09:25 pm ---
--- Quote from: Neper on June 27, 2022, 03:02:10 pm ---
--- Quote from: mnementh on June 27, 2022, 02:21:54 pm ---
--- Quote from: tggzzz on June 27, 2022, 02:08:00 pm ---
--- Quote from: Cerebus on June 27, 2022, 12:30:50 pm ---
--- Quote from: tggzzz on June 27, 2022, 09:52:25 am ---... 2400nm was unarmoured, 300nm armoured. ...
--- End quote ---
I don't think 2.4 micrometres of armour is going to make much difference. >:D
--- End quote ---
Sigh. The other nm in common use all around the world, i.e. not just USA.
But you knew that :)
--- End quote ---
So newton-metres then...? >:D
mnem
:popcorn:
--- End quote ---
Nautical miles?
--- End quote ---
Never mind...
--- End quote ---
Not me!
mnementh:
--- Quote from: AVGresponding on June 27, 2022, 06:58:50 pm ---
--- Quote from: dl6lr on June 27, 2022, 06:09:25 pm ---
--- Quote from: Neper on June 27, 2022, 03:02:10 pm ---
--- Quote from: mnementh on June 27, 2022, 02:21:54 pm ---
--- Quote from: tggzzz on June 27, 2022, 02:08:00 pm ---
--- Quote from: Cerebus on June 27, 2022, 12:30:50 pm ---
--- Quote from: tggzzz on June 27, 2022, 09:52:25 am ---... 2400nm was unarmoured, 300nm armoured. ...
--- End quote ---
I don't think 2.4 micrometres of armour is going to make much difference. >:D
--- End quote ---
Sigh. The other nm in common use all around the world, i.e. not just USA.
But you knew that :)
--- End quote ---
So newton-metres then...? >:D
mnem
:popcorn:
--- End quote ---
Nautical miles?
--- End quote ---
Never mind...
--- End quote ---
Not me!
--- End quote ---
numpty modulated.
mnem
>:D
capt bullshot:
--- Quote from: mnementh on June 27, 2022, 07:00:42 pm ---
--- Quote from: AVGresponding on June 27, 2022, 06:58:50 pm ---
--- Quote from: dl6lr on June 27, 2022, 06:09:25 pm ---
--- Quote from: Neper on June 27, 2022, 03:02:10 pm ---
--- Quote from: mnementh on June 27, 2022, 02:21:54 pm ---
--- Quote from: tggzzz on June 27, 2022, 02:08:00 pm ---
--- Quote from: Cerebus on June 27, 2022, 12:30:50 pm ---
--- Quote from: tggzzz on June 27, 2022, 09:52:25 am ---... 2400nm was unarmoured, 300nm armoured. ...
--- End quote ---
I don't think 2.4 micrometres of armour is going to make much difference. >:D
--- End quote ---
Sigh. The other nm in common use all around the world, i.e. not just USA.
But you knew that :)
--- End quote ---
So newton-metres then...? >:D
--- End quote ---
Nautical miles?
--- End quote ---
Never mind...
--- End quote ---
Not me!
--- End quote ---
numpty modulated.
--- End quote ---
near mexico
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