jea48

Responses from jea48

Mother of All Ground Loops
I am going to send these amplifiers back to the company to get looked at by Klaus. You might want to send the preamp along with the amps.Could be a coupling problem between the preamp and power-amps.You never said in your posts if a moderate to lo... 
Hooking up two Topaz Isolation trans. in series?
If I hook two topaz 1kva iso ultra transformers in series will I double the current capacity? I already have one 1kva topaz and am looking at another. Two of these at 16 amps would be enough for everything in my audio rack.Roddey99Roddey99,To incr... 
The Downside to Dedicated Lines vs. the Benefits
One question I haven’t nailed down as yet: Do I need to buy both a 100 amp (or, perhaps the 60-70 amp you mentioned) breaker for one of the two available slots on the main panel AS WELL AS a 100 Amp main breaker at the sub panel?The sub panel does... 
The Downside to Dedicated Lines vs. the Benefits
Unfortunately, I think your opinion lines up with mine and gives me reason to believe that a multiple circuit (dedicated or not) might cause more issues than it would solve.BTW, I noticed your comments were specific to equipment connected via IC's... 
The Downside to Dedicated Lines vs. the Benefits
The existing branch circuit (which will continue to feed the cable box installed in the rack, the plasma TV in the other room, the wall wart devices, etc.) is terminated and grounded at the main panel 80 feet away. The dedicated lines would termin... 
15 amp vs 20 amp difference?
For this reason, changing the outlet to a 20A is risky without also changing the wiring from the breaker box to that outlet.Inline_philAnd that is why NEC says a 20 amp receptacle shall not be installed on a 15 amp branch circuit.....  
15 amp vs 20 amp difference?
Shunyata Research equipment is UL/CSA Listed. Beings they use 20 amp receptacles they have to use a 20 amp IEC male connector to get the UL seal of approval.For some reason a power cord with a 20 amp IEC connector and a 15 amp plug is ok with UL..... 
Improper ground
Electrician had "really shaky hands" and I was nervous watching him attach my $144 Oyaide R1 AC Receptacle.LOL, can you imagine what was going through his mind... What kind of a nut would spend $144 bucks for a receptacle. He probably was thinking... 
Light bulbs are constanly burning out
So if he has a 3V differential between ac neutral and ac safety ground at the particular outlet he measured, let's make the following rough assumptions:-- 100 feet of wiring from the outlet to where those two lines are bonded together at the servi... 
Light bulbs are constanly burning out
Can I check the voltage myself with a multimeter? If so how?Agree with with Al...... But just remember the voltage reading will only be for that moment in time.I suggest you talk to the other tenants in the 4plex.See if they are having the same pr... 
Light bulbs are constanly burning out
I have this issue in Austin. My voltage is about 127 volts.09-10-09: Jfrech127V is too high... For residential customers the utility company is supposed to keep the voltage with-in (+ or -) 5%. 120V being the base line.You should contact your uti... 
Light bulbs are constanly burning out
Nick_sr,I would suggest you contact the landlord or building manager.The problem could be a loose service entrance neutral conductor.Have you ever noticed all of a sudden some lights get brighter at times while other go dim?First call should be to... 
Live equipment chassis
Albert,LOL, or you could get a 25% stainless steel thread suit like this guy wears. 
Live equipment chassis
Kiwi_1282001,Can you be more specific?..... Other than a static electricity charge shock an electrical shock from our home's electrical power source requires a point of entry and a point/s of exit.Example, in one hand out the other. Or from a hand... 
Amplifier Hum - A Problem Solved
Hoff48,You might try installing a small isolation transformer on the line side of the low voltage lighting power supply. The isolation transformer should block the DC offset voltage from passing from the secondary winding to the primary winding, o...