jea48
Responses from jea48
| 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... | |
| Any Audiophile Fuses UL approved? Technically the fuse does not have to be safety tested by UL. For electrical safety it should be tested by an NRTL recognized testing laboratory though. NRTL recognized testing laboratorieshttps://www.osha.gov/dts/otpca/nrtl/nrtllist.htmlhtt... | |
| Wattgate 381 outlet:any comments from the owners? overhang,JMHO, you would do a lot better buying a Porter Port and save yourself over a $100.00. http://www.porterhouseaudio.com/Porter-ports.htmNote: The Porter Port is a Hubbell IG 5362 (20) amp duplex receptacle. IG, (Isolate Ground), means the... | |
| Equipment break in question You need to feed a digital signal to the DAC and have cables connected to the analog output jacks connected to the amp. If an integrated amp is used set the source input to the CDT/DAC. The amp does not need to be turned on. (That is unless the am... | |
| How to identify tube amp surfersf OP7 posts02-09-2019 3:19pmClosing the loop on this thread. I just returned from True Sound in Campbell. Talked to Nick Gowan who researched the pin sockets. He confirmed it’s a push-pull design that uses common tubes. He has high confid... | |
| How to identify tube amp Looks like a kit to me. Maybe a clone. Your Uncle may have assembled it himself. Did he have a background in electronics?Note the printed circuit board. That helps somewhat date the unit.Can’t see the back of the unit, no picture. Just a guess an ... |