- In Need of tone genertor/cable tracer - 9 Updates
- Denon UD-M31 CD Problem - 1 Update
| "Peter W." <peterwieck33@gmail.com>: Aug 28 11:29AM -0700 > Works well tracing house wiring. > Just remember to turn off ALL circuit breakers in the mains panel. No. "Designed for use with telephone lines, alarm cables, computer cables, intercom lines, speaker wires, and thermostat wiring." Not line voltage. And not for underground tracing either. Peter Wieck Melrose Park, PA |
| Rob <nomail@example.com>: Aug 28 08:54PM +0200 >> Just remember to turn off ALL circuit breakers in the mains panel. > No. "Designed for use with telephone lines, alarm cables, computer cables, intercom lines, speaker wires, and thermostat wiring." > Not line voltage. And not for underground tracing either. But the question was "I need to trace some cables (phone catv, ethernet) throughout a house.". So what is your problem? |
| Phil Allison <pallison49@gmail.com>: Aug 28 01:26PM -0700 Rob wrote: ======== > But the question was "I need to trace some cables (phone catv, ethernet) > throughout a house.". > So what is your problem? ** There are TWO different questions here from TWO posters. Pay attention. ..... Phil |
| "Peter W." <peterwieck33@gmail.com>: Aug 28 03:31PM -0700 > So what is your problem? Do you not read for content? Peter Wieck Melrose Park, PA |
| Tim R <timothy42bach@gmail.com>: Aug 28 05:47PM -0700 On Saturday, August 28, 2021 at 10:45:55 AM UTC-4, Peter W. wrote: > That is a low-voltage device, not for power lines. Underground cable tracers are very different animals, and substantially more costly. if all you need to do is 6-8" or so, borrow a decent metal detector and trace that way. You will be within inches - dig out that area by hand. In any case, do call your local One-Call service, it is free and often you have no idea of what may be down there. And they DO have the costly devices. > Peter Wieck > Melrose Park, PA Sorry to confuse the thread with two different applications. My thought was that if a signal generator can put a tone on my line, I could shut the breaker in the house, leave the shed dead, put the signal on the shed end, and trace the wire back to the house. It seems like that should work if the wire is 6 inches down, maybe not if it's 18. Or maybe those tone generators don't work at all underground, I've never tried it. I did borrow a metal detector some years ago but got inconclusive results. Maybe i could rent a better one from a big box or electrical place. I'm sure the there is no conduit, I hit a wire some years back that looked like UFB, so I know where at least one piece of it is, and it wasn't where I expected it. |
| Phil Allison <pallison49@gmail.com>: Aug 28 06:03PM -0700 timoth...@gmail.com wrote: ---------------------------------------------------- > Sorry to confuse the thread with two different applications. > My thought was that if a signal generator can put a tone on my line, I could shut the breaker in the house, leave the shed dead, put the signal on the shed end, and trace the wire back to the house. ** LOL - that is NOT what tone generators do !! Their job is to facilitate cable *identification* where multiples exist. OTOH a buried mains cable reveals it *location * by the magnetic field created by all the damn AC current flowing in it !! ..... Phil |
| Jeff Liebermann <jeffl@cruzio.com>: Aug 28 06:46PM -0700 On Sat, 28 Aug 2021 18:03:03 -0700 (PDT), Phil Allison >Their job is to facilitate cable *identification* where multiples exist. >OTOH a buried mains cable reveals it *location * by the magnetic field created by all the damn AC current flowing in it !! >..... Phil This might help: "Buyers Guide To Cable Locators" <https://www.tigersupplies.com/LC/Buyers-Guide-To-Cable-Locators-.aspx> There are some that work at 60 Hz, but most use higher frequencies. There's just too much interference at 60 Hz. Also, the higher the frequency, the higher the resolution, which translates in a more accurately located cable. "Successful Locating Depends on Knowing Which Frequency to Use" <https://www.utilityproducts.com/tools-supplies/article/16003409/successful-locating-depends-on-knowing-which-frequency-to-use> More than you probably wanted to know: "The theory of buried cable and pipe location" <https://www.radiodetection.com/sites/default/files/Theory-Buried-pipe-manual-V10.pdf> For what it's worth, I used an RF signal generator to locate buried cables. The trick is to build a series resonant RF transformer (ferrite torroid) for your choice of RF frequency. I picked the 160 meter ham band (1.8 to 2.0Mhz), much to the irritation of the local ham radio operators. The generator was set to about 70% AM modulation at 1KHz to produce a detectable tone. The resonant transformer will pass the RF but not the 60 Hz line frequency, thus insuring that there is some hope that the RF generator will survive the exercise. It also provides an ungrounded connection to the power line, which should prevent some types accidental electrocutions. The difficult part was designing and building a suitable pickup coil. I finally resorted to a ferrite rod (loopstick) antenna similar to what is found in many SW (short wave) receivers. <https://www.google.com/search?q=loopstick+antenna&tbm=isch> Such a loopstick antenna a nice deep null in the antenna pattern off the end of the rod, which makes direction finding possible. If I were to design a cable locator today, the system would be quite different. The problem with using only one frequency is that various types of dirt attenuate different frequencies differently. Instead of one frequency, I would use a range of frequencies (spread spectrum), in the hope that at least one frequency will make it through the dirt (and interference). That's how ground penetrating radar works. <https://ieeexplore.ieee.org/abstract/document/9381259> The last time I had to locate some underground wiring, I was lazy and used an acoustic method. I made a low frequency "buzzer" that ran from compressed air. I shoved the air hose as far up the PVC conduit as possible and turned on the buzzer. With a 1 HP motor, that might produce 200 watts of audible buzz, which should be audible at ground level. I used a stethoscope to locate the buried conduit. It wasn't very precise at locating the conduit, but good enough to provide clearance for a backhoe trencher. Good luck. -- Jeff Liebermann jeffl@cruzio.com PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
| Bob F <bobnospam@gmail.com>: Aug 28 08:15PM -0700 On 8/26/2021 11:30 AM, three_jeeps wrote: > I did make a 'break out box' for the rj45 and rj11 sockets where needed. > Thanks > j https://www.harborfreight.com/cable-tracker-94181.html |
| "Peter W." <peterwieck33@gmail.com>: Aug 29 04:31AM -0700 > https://www.harborfreight.com/cable-tracker-94181.html Designed for use with telephone lines, alarm cables, computer cables, intercom lines, speaker wires, and thermostat wiring Do you NOT read for content, or is it that you cannot read at all? Apples: Low-voltage signal wire inside a structure - where only one end may be identified - and getting to the other is the exercise, and possibly identifying individual conductors within a cable. Oranges: Line-voltage wiring buried underground - where both ends are identified, but the pathway is not. Peter WIeck Melrose Park, PA |
| "Dušan Köszeghy" <dusan.koszeghy@gmail.com>: Aug 28 05:17PM -0700 Dňa piatok 27. augusta 2021 o 18:56:25 UTC+2 používateľ Peter W. napísal: > Generalized warning: OEM belts for obsolete equipment are generally a bad choice, as those parts in may cases are as old and have sat around just as long as the parts inside the unit. I have had 100% success ordering generic O-rings from McMaster-Carr to the correct size, configuration and diameter (and at a fraction of the OEM cost). I have a choice of materials, O, [], D, 0 or otherwise, even toothed, and they are fresh. > Peter Wieck > Melrose Park, PA And? Got mine problem now, so what is the big deal? |
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