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Old 5th April 2013, 11:40 AM   #1
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Default Could you identify this part?

Hi all, I received a bunch of items and this one I could not identify.
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Old 5th April 2013, 12:12 PM   #2
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It's a spare part from the Tardis, I believe the Doctor would pay big bucks for one.
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Old 5th April 2013, 12:32 PM   #3
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Good, because I have 20 of them
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Old 5th April 2013, 12:37 PM   #4
oshifis is offline oshifis  Hungary
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optocoupler?
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Old 5th April 2013, 01:19 PM   #5
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It looks like it is not. Putting an ohmmeter between the 2 "C" terminals reads a few ohms whatever the polarity is. The same goes if I read between the "In" and "Out". Resistence is infinite between any "C" and "In" or "Out".
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Old 5th April 2013, 01:48 PM   #6
Elvee is online now Elvee  Belgium
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Quote:
Originally Posted by michouthefirst View Post
Hi all, I received a bunch of items and this one I could not identify.
They look very much like delay lines. They could also be filters.
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Old 5th April 2013, 02:05 PM   #7
JMFahey is online now JMFahey  Argentina
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Quote:
Originally Posted by michouthefirst View Post
It looks like it is not. Putting an ohmmeter between the 2 "C" terminals reads a few ohms whatever the polarity is. The same goes if I read between the "In" and "Out". Resistence is infinite between any "C" and "In" or "Out".
What you measure is compatible with a line/RF filter.
A low DC resistance L from input to output, "maybe" same between grounds ("C" might mean "common" , oldspeak for Ground) and one or more low value capacitors from hot to ground.

*If* you were wishing to analyze it or something, drive it with a sweep signal, load it with something, 10K is as good as anything else to start, and measure/trace what comes out.
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Old 5th April 2013, 02:15 PM   #8
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Hi,
I agreed with Elvee. It is possible that it is a delay. They used something like that in old computer memory and analog scanners. Since you have 20 what about breaking one apart and see what it is in inside.
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Old 5th April 2013, 03:39 PM   #9
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Engineered Components Company Delay Line P N TTLDL 25M | eBay

Shows a more modern unit with drivers.
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Old 5th April 2013, 03:54 PM   #10
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OK, got it from the eBay description (his description was very hard to read since it has numerous items and the guy had a very long description with all sorts of fonts and colors).

Anyways, here it is:

60pF input, 20uH bridge, 60pF output.

So, this seems to be a low-pass filter. Right?
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