3 ms·
I think it'd be a YT engineer who thinks inductively-coupled 120V AC into an extremely low-impedance circuit over a few tens of feet would cause a problem, not
by coryrc 4y ago
I think it'd be a YT engineer who thinks inductively-coupled 120V AC into an extremely low-impedance circuit over a few tens of feet would cause a problem, not an actual EE.
- svnt 4y agoSimilarly with 60Hz hum on phone lines in any recent decade. If the phone doesn’t have a filter, which it probably does, you can notch the hum for $20. OP is verysmart. The contractors didn’t know because it doesn’t impact anyone anymore.
- WalterBright 4y agoI've heard of enough house phones with a hum. At the time I read everything I could find on low voltage wiring, and they recommended what I did. My phone lines are quiet. I also used cat5e for the phone lines and ethernet, and have no trouble with the 100Mb wires and gig equipment. (Cat6 wasn't available at the time.) (The electrician tried to run cat3 or some other cheap garbage wire. He also tried to run RG59 coax, which I ripped out and replaced with RG6 quad shielded wire.) > recent decade This was in 1999. The wiring has survived several upgrades in digital equipment and bandwidth without change. > which it probably does Then it evidently is a problem, as otherwise the filter wouldn't be necessary. Besides, my phone was built in the 1950s. P.S. I'm not an EE. I'm an ME.