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Post AU96kvzhoPgCigwaCu by [email protected] |
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More posts by [email protected] |
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Post #AU7x4ohLSHuxBQEoF6 by [email protected] |
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Speaking of telephony experience, I just used a kick meter to estimate the amou… |
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Post #AU7yDwwkG0a5KFMNVY by [email protected] |
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@mattblaze lol, i just use the ft marks on the wire…. |
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Post #AU7yDx100Bz3XRLm8e by [email protected] |
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@ogg That works, if you know the starting number when the box was new... |
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Post #AU83XTqSfGIUdEYLkO by [email protected] |
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"What's a kick meter?", you ask?"Kick meter" is the com… |
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Post #AU848kJ2QTiYOngmzw by [email protected] |
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... In addition to a switch to measure Volts or Ohms and a resistance zero pot,… |
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Post #AU84ahfznSneLql5sm by [email protected] |
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... If there's any capacitance on the input, what the ohm meter was actuall… |
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Post #AU84z5LjQqziiquGDQ by [email protected] |
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... a long twisted pair cable (such as a phone local loop or Ethernet cable) bu… |
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Post #AU85E6sC3991n8FpZI by [email protected] |
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... well before the invention of the TDR, this method was how the phone company… |
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Post #AU85WZsSx0hYxYBiSW by [email protected] |
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@mattblaze Won't a twisted pair also have an inductance? Does that affect … |
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Post #AU85WZwMiVox9e0pXM by [email protected] |
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@skydog It does, but the capacitance dominates. |
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Post #AU86aAmOJ3NmERcn8C by [email protected] |
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@mattblaze what, no pictures? |
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Post #AU86aAqe3EmkRdcBlI by [email protected] |
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@d_a_keldsen Needs a video, really. Maybe later. |
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Post #AU96kvvS4EHEVUxBZo by [email protected] |
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@mattblaze Now I have to ask: you'd have to "calibrate" that for … |
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Post #AU96kvzhoPgCigwaCu by [email protected] |
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@cm There are differences, but they're smaller than the measurement error w… |
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Post #AUUIzGHKTIjHSCwZkW by [email protected] |
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For the record (see thread): still works, though the original battery (manufact… |
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Post #AUUOoikEtTU6HQp66C by [email protected] |
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@mattblaze Remind me, how much distance per point? |
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Post #AUUOoioqcLAeViymHY by [email protected] |
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@oclsc 480 feet |
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Post #AUUOtxVxPMAZXFdmSW by [email protected] |
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@mattblaze45V or 4.5V?? |
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Post #AUUOtxaZ8Dr7lXnSds by [email protected] |
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@ckd 45V |
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Post #AUUQiy752chu7CtM00 by [email protected] |
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@mattblaze Hmm. Not the right scale for my kinda use. Tempting to roll my own, … |
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Post #AUUQiyBglUOSLV32BM by [email protected] |
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@oclsc the Tempo Sidekick (the more modern version) has a scale where 1pt is 50… |
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Post #AUVo6dDas7m0Mf9PCi by [email protected] |
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@mattblaze This is slightly inaccurate: The line also contains inductance (it c… |
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Post #AUVo6dICazSYaxJ5O4 by [email protected] |
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@robryk The inductance is tiny compared with the capacitance here. |
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Post #AUVwsK9XrIpglfVeNM by [email protected] |
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@mattblaze The only way I can think of comparing the two (comparing impedance) … |
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Post #AUVwsKDnbUEeyrV30S by [email protected] |
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@robryk perhaps you misunderstand the measurement technique here. You hook up a… |
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Post #AUWZZs5xKpgGkQ1TVo by [email protected] |
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@mattblaze Sure. So at a very crude approximation, the circuit we have is a ser… |
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Post #AUWZZsAZ3hMoyiB9hA by [email protected] |
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@robryk I'm really not interested in debating transmission line theory with… |
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Post #AUYWPBJLdfzXc5PxEe by [email protected] |
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@mattblaze In that case would you mind measuring (or reading off its documentat… |
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Post #AUYWPBNbNrOVpHPLrk by [email protected] |
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@robryk Analog Ohm meters always have a pot you adjust to zero the meter before… |
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Post #AUYcBCrXfnPe618BkW by [email protected] |
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@robryk E.g., you can use the RC time constant to calculate how long the meter … |
