jea48

Responses from jea48

I know my tubes (VT100 mkII) are going when...
Power tubes are usually good on average for 1500 to 2000 hrs.Life of small 6922 signal tubes can vary but can last as many as 10,000 hours. Though not that high on new production tubes made today.Replacing the power tubes is fairly simple. Just fo... 
Directionality of wire
herman                                                      1,946 posts08-06-2017 12:42pm about thisThe speaker transducer moves forward and backward according to EMF acting on the voice coil - see Faraday’s law and Maxwells equations - so both... 
Directionality of wire
@geofkkait,Quote from Ralph Morrison The laws I want to talk about are the basic laws of electricity. I'm notreferring to circuit theory laws as described by Kirchhoff or Ohm but thelaws governing the electric and magnetic fields. These fields are... 
Directionality of wire
herman,Thank you for the response. shadorne5,793 posts08-01-2017 1:22pm@jea48 The speaker transducer moves forward and backward according to EMF acting on the voice coil - see Faraday’s law and Maxwells equations - so both +ve and -ve current d... 
Dedicated Line Noise Filter?
Thanks Bill (whart), and lowrider57, for the kind words.Jim  
Dedicated Line Noise Filter?
cleeds said: That your contractor didn't know this - and didn't insist on applying for the required electrical construction permit - raises questions about his competency, and whether he's even licensed to perform this work. I would be willing ... 
Dedicated Line Noise Filter?
lak,Thanks for the kind words.Jim 
Dedicated Line Noise Filter?
@lowrider57,On second thought, if you see the green bonding screw on the neutral bar or a bonding strap connected to the neutral bar that is connected to the metal enclosure, do not remove it. Post back what you find. Do not change anything in the... 
Dedicated Line Noise Filter?
almarg 7,350 posts07-15-2017 1:27pmThe sub-panel is connected by the hot lead and has it’s own ground including a second grounding rod. Lowrider, my understanding is that a sub-panel should have hot, neutral, and safety ground all wired back to t... 
Does my laptop need to be grounded when charging?
I have noticed that when I am barefoot and gently rub my finger over the metal surfaces of the laptop that I feel a slight fuzziness as if there is stray voltage going through me. It is not a shock per se and the sensation goes away when the char... 
Does my laptop need to be grounded when charging?
@jc4659 Is the AC plug on the charger polarized? If not try reversing it 180 in the wall outlet and see if that helps. 
Dedicated Line Noise Filter?
5000Va / 120V = 42 amps. 
plugging a Cdplayer to Vintage sx-880 Pioneer
No you will not damage the SX-880 if you don’t crank up the volume control knob to high causing the amplifier to start to distort. If you turn the volume control up to high that will drive the amp into clipping, then you could fry your speakers.If... 
plugging a Cdplayer to Vintage sx-880 Pioneer
Let’s work through a real example to make things easier to follow (using data for my Pioneer SX-1250 receiver and Marantz CD-65SE CD player - typical of many vintage amp / modern CD player combinations) : Input sensitivity of SX-1250 "Aux" (... 
plugging a Cdplayer to Vintage sx-880 Pioneer
i tried both Aux and monitor tape 1 or 2 i dont understand why the monitor tapes inputs sounds better to me and the aux sounds louder but too much mids a highs a little bit exagerated i read many people prefer the monitor over the aux . Make sure...