 |
Post AUUOtxVxPMAZXFdmSW by [email protected] |
 |
More posts by [email protected] |
|
Post #AU7x4ohLSHuxBQEoF6 by [email protected] |
|
0 likes, 0 repeats |
|
|
|
Speaking of telephony experience, I just used a kick meter to estimate the amou… |
|
|
|
Post #AU7yDwwkG0a5KFMNVY by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze lol, i just use the ft marks on the wire…. |
|
|
|
Post #AU7yDx100Bz3XRLm8e by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@ogg That works, if you know the starting number when the box was new... |
|
|
|
Post #AU83XTqSfGIUdEYLkO by [email protected] |
|
0 likes, 0 repeats |
|
|
|
"What's a kick meter?", you ask?"Kick meter" is the com… |
|
|
|
Post #AU848kJ2QTiYOngmzw by [email protected] |
|
0 likes, 0 repeats |
|
|
|
... In addition to a switch to measure Volts or Ohms and a resistance zero pot,… |
|
|
|
Post #AU84ahfznSneLql5sm by [email protected] |
|
0 likes, 0 repeats |
|
|
|
... If there's any capacitance on the input, what the ohm meter was actuall… |
|
|
|
Post #AU84z5LjQqziiquGDQ by [email protected] |
|
0 likes, 0 repeats |
|
|
|
... a long twisted pair cable (such as a phone local loop or Ethernet cable) bu… |
|
|
|
Post #AU85E6sC3991n8FpZI by [email protected] |
|
0 likes, 0 repeats |
|
|
|
... well before the invention of the TDR, this method was how the phone company… |
|
|
|
Post #AU85WZsSx0hYxYBiSW by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze Won't a twisted pair also have an inductance? Does that affect … |
|
|
|
Post #AU85WZwMiVox9e0pXM by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@skydog It does, but the capacitance dominates. |
|
|
|
Post #AU86aAmOJ3NmERcn8C by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze what, no pictures? |
|
|
|
Post #AU86aAqe3EmkRdcBlI by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@d_a_keldsen Needs a video, really. Maybe later. |
|
|
|
Post #AU96kvvS4EHEVUxBZo by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze Now I have to ask: you'd have to "calibrate" that for … |
|
|
|
Post #AU96kvzhoPgCigwaCu by [email protected] |
|
0 likes, 1 repeats |
|
|
|
@cm There are differences, but they're smaller than the measurement error w… |
|
|
|
Post #AUUIzGHKTIjHSCwZkW by [email protected] |
|
0 likes, 0 repeats |
|
|
|
For the record (see thread): still works, though the original battery (manufact… |
|
|
|
Post #AUUOoikEtTU6HQp66C by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze Remind me, how much distance per point? |
|
|
|
Post #AUUOoioqcLAeViymHY by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@oclsc 480 feet |
|
|
|
Post #AUUOtxVxPMAZXFdmSW by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze45V or 4.5V?? |
|
|
|
Post #AUUOtxaZ8Dr7lXnSds by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@ckd 45V |
|
|
|
Post #AUUQiy752chu7CtM00 by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze Hmm. Not the right scale for my kinda use. Tempting to roll my own, … |
|
|
|
Post #AUUQiyBglUOSLV32BM by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@oclsc the Tempo Sidekick (the more modern version) has a scale where 1pt is 50… |
|
|
|
Post #AUVo6dDas7m0Mf9PCi by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze This is slightly inaccurate: The line also contains inductance (it c… |
|
|
|
Post #AUVo6dICazSYaxJ5O4 by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@robryk The inductance is tiny compared with the capacitance here. |
|
|
|
Post #AUVwsK9XrIpglfVeNM by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze The only way I can think of comparing the two (comparing impedance) … |
|
|
|
Post #AUVwsKDnbUEeyrV30S by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@robryk perhaps you misunderstand the measurement technique here. You hook up a… |
|
|
|
Post #AUWZZs5xKpgGkQ1TVo by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze Sure. So at a very crude approximation, the circuit we have is a ser… |
|
|
|
Post #AUWZZsAZ3hMoyiB9hA by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@robryk I'm really not interested in debating transmission line theory with… |
|
|
|
Post #AUYWPBJLdfzXc5PxEe by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@mattblaze In that case would you mind measuring (or reading off its documentat… |
|
|
|
Post #AUYWPBNbNrOVpHPLrk by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@robryk Analog Ohm meters always have a pot you adjust to zero the meter before… |
|
|
|
Post #AUYcBCrXfnPe618BkW by [email protected] |
|
0 likes, 0 repeats |
|
|
|
@robryk E.g., you can use the RC time constant to calculate how long the meter … |
