jea48
Responses from jea48
| Installation of new AC lines......best way to ground to avoid loops and noise brayeagle211 posts03-20-2019 10:56pmMy two 20 amp dedicated circuits were installed by a licensed electrician, then checked by the City’s Code Inspector. Why? Homeowners Insurance, City requirements, Warranty for the work, and Peace of Mind. I’m... | |
| Installation of new AC lines......best way to ground to avoid loops and noise millercarbon443 posts03-19-2019 6:40pmRight jea48. That’s why I said it may or may not be better.Right jsautter except unfortunately you have to slog through 43 pages to get to page 44 where finally they show what I clearly explained in far fewe... | |
| Installation of new AC lines......best way to ground to avoid loops and noise @ jsautter Mother earth does not posses some magical, mystical, power that sucks nasties from an audio system Grounding Myths From Henry W. Ott’s big new book "Electromagnetic Compatibility Engineering" 3.1.7 Grounding Myths More myths exist ... | |
| Installation of new AC lines......best way to ground to avoid loops and noise @ jsautter Read pages 5 through 39.https://centralindianaaes.files.wordpress.com/2012/09/indy-aes-2012-seminar-w-notes-v1-0.pdf. | |
| electrical isolation of amp and other gear Pass Labs XA30.8 amp plugged directly into a dedicated branch circuit wall outlet. Preferably a dedicated 20 amp circuit.https://www.passlabs.com/press/power-supplies-commentary-consumers Audio equipment that connects together by wire interconnect... | |
| Power Amp transformer hum - intermittent and increases and decreases in a few seconds john_simp OP22 posts03-13-2019 2:17pmI don’t have a multimeter. This is my basement Home Theater and I do have cheap LED light bulbs in use. I turned them off to see if I still get the hum. I’ll check it over the next few days to see what happen... | |
| Help - I've Got the Dreaded Transformer Growl.... keoliphant OP50 posts03-13-2019 5:52pmBack to the drawing board. The Emotiva CMX-2 didn’t help at all so it’s being returned tomorrow. https://www.hegel.com/products/integrated/h590The DC blocker must have an ampere rating as big or bigger than ... | |
| One or two dedicated AC wire ? Example of a 20 20 Tandem Breaker. https://www.superbreakers.net/1-pole-circuit-breakers/square-d-qo2020-20-amp?gclid=EAIaIQobChMI9fmut...Two single pole breakers in a common 1" enclosure. Both breaker units share a common buss connector.More exam... | |
| Power Amp transformer hum - intermittent and increases and decreases in a few seconds john_simp OP21 posts03-12-2019 1:24pmI’m using a Harman PA5800 that I recently purchased from a friend. I’ve had it for less than a month. The transformer is not loose, and the amp appears to be in excellent condition. I also moved the amp to an... | |
| Power Amp transformer hum - intermittent and increases and decreases in a few seconds don_c55826 posts03-11-2019 4:16pmMy Pass Labs XA60.5 never buzzes and it has Toroids. Just a guess because Pass Labs incorporates a DC blocker in their power amps.Bryston does......https://www.diyaudio.com/forums/power-supplies/161428-variations... | |
| Audire Diffet 1 hum roberjerman2,090 posts03-08-2019 1:42amAn appearance of hum in old equipment is most likely due to aging power supply capacitors! An easy and affordable fix! True. Except the OP said the hum sounded like a 60HZ hum and not that of a 120HZ hum. I... | |
| Audire Diffet 1 hum The Audire amplifier and preamplifier are both old enough to have just a two prong electrical plug. Do you have a multimeter?I assume the AC power plugs on the preamp and power are not polarized? They will plug into the receptacle outlet in eithe... | |
| Audire Diffet 1 hum Listen to the 60Hz Hum and then the 120Hz Hum. Does either of them sound like your hum?Also I forgot to ask you earlier, does the hum vary with the volume control?60Hz hum https://www.youtube.com/watch?v=SVZ2P0KsLic 120Hz hum https://www.youtube.c... | |
| Audire Diffet 1 hum Jmho, it’s not DC offset on the AC mains. I agree it could be a ground loop hum. For a test disconnect all source equipment interconnects from the inputs of the preamp. If you have a sub also disconnect any interconnect/s from the preamp.Plug the ... | |
| Can I use just half the biwire? @ scott_w I also agree with lowrider57 Something no one has mentioned, will the un-terminated ends of the bi-wire cable work as an antenna and introduce RF back into the output of the amplifier? You might want to send a PM to almarg and ask for h... |