jea48

Responses from jea48

Loud background noise: cables picking up RF?
You are not hearing transmitted RF through your speakers - you cannot hear RF and your speakers cannot reproduce it - outside the frequency range for both.His audio system can work like an antenna and receiver. And long speaker cables can work as ... 
Loud background noise: cables picking up RF?
You don't have to recognize the sounds for it to be RFI.True. There are many forms of RFI. But with that said do you think if his problem is RFI, is it being caused from the communication towers?An arcing from a loose electrical power connection c... 
Loud background noise: cables picking up RF?
I have a significant background noise problem in my system. At normal listening levels, I am getting static that is audible from 15 feet away, and also a whistling sound coming through the speakers from time to time.I don't think I have read where... 
How to disperse avail. amperage?
I'll let you know what my electrician says about the isolated grounding bar/from the I/G outlets. Thanks again.LissnrIt is a Myth that the earth has some mystical magical power that sucks RFI/EMI noise from an audio system.Though I do not advocat... 
Dedicated power
Isolated grounding type receptacles are used mainly in commercial and industrial facilities. Usually they are used for connected loads of sensitive electronic equipment where EMI/RFI noise may be present on electrical metallic conduit, metal wall ... 
Dedicated power
I've been told this is supposedly an acceptable practice but the I/G outlets must run their grounding wires to a separate isolated grounding bar and ultimately out to a buried grounding rod.>>>>>>>>>>>>>>&... 
How to disperse avail. amperage?
I would recommend "Lutron" Dimmers! 
How to disperse avail. amperage?
The overall [cable length] distance from main box to sub panel will be about 50'That's a far cry from 110' you posted earlier......If the run is only a total of 50' then #4awg copper should be fine.As for the separate ground...I'll ask my electric... 
How to disperse avail. amperage?
I also bought the optional ISOLATED grounding bar for it.Why? An isolated ground bar will serve no purpose. I imagine the panel enclosure will be mounted to wood studs and the branch circuit wiring will be NM-B cable. (Romex is an example of NM-B)... 
Question about vintage Marantz 22xx power output
Vintage Marantz 
How to disperse avail. amperage?
I didn't even realize that the ground wire was supposed to return to connect to the main house panel!!Yes it does, as per NEC.I thought we were going to run a ground wire from the sub-panel via a #6G bare copper wire to an 8'-10' pole hammered int... 
How to disperse avail. amperage?
Lissnr, You did not mention how far from the house the garage is.Distance from the house main electrical panel, to the new audio room sub panel? You may need to take into account voltage drop. You stated the new sub panel feeder will be buried 18"... 
Preamp with tuner.... connections question
Does it have tape-out outputs? If so use them and connect to a set of line-in inputs on the preamp you are using. 
Power Cord Question
07-25-08: DarkkeysJea48 writes: Many manufactures of audio equipment are building their equipment this way. Because of potential ground loop hum problems manufactures are using double insulated AC power wiring instead of having to use the safety e... 
Using a Digital Multimeter for the first time
Correct me if i'm wrong.Your suggestion is to insert the leads of the volt meter into the jacks of the amp.Then turn the amp on and wait at least 30 minutes before taking a reading.If this is correct can I play music while the meter is attached to...