jea48
Responses from jea48
| VARIAC: Procedure??? 2 old 30 wpc tube amps, unused for 4 years Unless the amps were modified there are not any regulators in the amps. A schematic wiring diagram can be found in the instruction manual. Just a guess the power supply caps were replaced as well as any coupling capacitors.I would probably pull al... | |
| Is it time for new surge suppression devices? NEC now recommends whole house surge suppression Erik, I think you meant to say NEC now requiresYour State, county, or city, may not have adopted the 2020 NEC as yet. Check your State. https://www.jadelearning.com/nec-code-adoptions-by-state/For ... | |
| Why Do All Arcam Units (and Maybe Others) Have Only Two-Prong Power? @ jwseitz Because Arcam spent the additional cost and used double insulated AC power wiring. Class II (with Roman numerals) refers to power supplies with either a double or reinforced insulation barrier between the input and the output. Class II... | |
| Electromagnetic fields. Be forewarned, this involves science... @ perkri You said: You can see in the movie how an ac signal generates waves in a predictable pattern along the conductor. With the complex waves being generated by an audio signal going through a wire, those waves are going to, in turn, have an i... | |
| 60 Hz Hum from Powered Sub The 2 prongs on a plug, one is hot the other neutral, aka utility ground. The third is earth ground and is redundant. My first thought when reading this was to not respond. But then after thinking about it for awhile I would be remiss if I did no... | |
| How To Do You Measure the Quality of Your AC Power? mkgus OP281 posts 08-31-2021 10:57am Quick update: I called my utility company and they sent someone out immediately. They discovered that the neutral lug on the homeowner side of the meter was loose and the bolt is stripped. An electrician is o... | |
| 60 Hz Hum from Powered Sub I assume the DC power supply uses full wave rectification. : a rectifier that converts alternating current into continuous current and that utilizes both halves of each cycle of the alternating current. 120 ripples per second. I would think if i... | |
| 60 Hz Hum from Powered Sub spacecadet65 said: 08-30-2021 9:13am The hum is present whether there is an audio source connected or not. | |
| 60 Hz Hum from Powered Sub @ spacecadet65,Which sound best describes the hum you hear from the sub? 60Hz hum https://www.youtube.com/watch?v=SVZ2P0KsLic 60Hz buzz https://www.youtube.com/watch?v=FBRPHojSGAs120Hz hum https://www.youtube.com/watch?v=pC4Uzt0... | |
| Clean ground @pauly When it comes to audio I’ll believe anything until proven otherwise. https://www.auralthrillsaudio.com/battac.htmAs for a "Clean Ground". I see you live in the NE. Assuming soil in your area is not excessively sandy and is black dirt and cl... | |
| Clean ground @pauly You said: Correct.Nothing touches a wall socket with the exception of the three prong plug that provides access to ground. I charge when I’m not listening.In the rare event that I want to take input from, or output to, a device that is plu... | |
| Over loading? danmar123 OP54 posts 08-16-2021 9:22am I (personally) ran 8/3 from my main, on a 60 amp breaker @danmar123 #8 awg cu wire is rated for 40 amps (60* C). Breaker should be 2 pole 40 amp. This is why I’m asking; I don’t want to harm my amps. No ... | |
| Over loading? Guys don’t forget to figure branch circuit wiring VD (Voltage Drop). Example: For a 60ft branch circuit using #14awg cu wire during short peaks of 12 amps current draw. Voltage drop: 3.85Voltage drop percentage: 3.21%Voltage at the end: 116.15 15 ... | |
| Over loading? fiesta75632 posts 08-16-2021 12:01am For me I changed my 15 amp breaker to 20 amps because it popped occasionally on power up only, never while playing loud. I had 9.6kW output into 4 ohms though... @ fiesta75 What is the branch circuit wiring s... | |
| Power conditioning for multiple dedicated circuits danvignau911 posts 08-13-2021 7:02am I hope you ran all four outlets to the same leg on your electrical panel. If not, do it. You will be pleasantly surprised, and all it takes is to switch the breaker around. It is not even necessary to remove ... |