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james1969

Responses from james1969

high frequency intermittent noise
@toddverrone  I agree, I've listened to people on YouTube playing the sound of cell towers through their test tools, and it sounds like cell tower noise to me as well.What if the cell phone tower across the street is injecting noise into the elect... 
high frequency intermittent noise
@jea48 This noise issue has been in my system for as long as I have used my system in my current apartment. So it was there before I swapped out my receptacle outlet.  Keep in mind, this noise is just below the noise floor of my apartment, so you ... 
THE LITTLE BLACK BOX, 399.00 ABSOLUTLY NUTS
If you were a small business with very limited resources (manufacturing all by hand) and could only produce X amount of products per year, and your product became very popular (demand increases exponentially), the only thing you can do is raise yo... 
high frequency intermittent noise
@kosst_amojan  My interconnects are all shielded, but they could be under-shielded.  If I turn everything off in my system except for my amps, I can still hear the noise.  So in that case we would look at the speaker cables, they are shielded too.... 
high frequency intermittent noise
@jea48 Thank you for all your expertise.  I will pick up that receptacle tester and check it out. 
high frequency intermittent noise
@jea48 Funny you should mention socket outlets, I just changed my socket outlet from a generic to a Furutech outlet (audiophile brand).  When I opened up the original socket, there were only 2 connections made with no ground.  That is how I know t... 
high frequency intermittent noise
Actually the new hot spot is Hudson Yards, that is where new construction is happening.  But I hear you, our infrastructure is falling apart. 
For tube sound, which is more important: preamp or power amp?
Another reason to stay with 1 designer, they will make sure their components have synergy. 
For tube sound, which is more important: preamp or power amp?
@toddverrone What kind of speakers are you using? 
high frequency intermittent noise
If I listen carefully, I can hear the train go by underneath my building,  There is a low frequency buildup when this occurs looking at a real time analyzer, and I can actually hear the subway cars on the rails, so today I am listening carefully i... 
high frequency intermittent noise
I live in a neighborhood where we have the oldest electrical system in the city.  A few years back, an underground power transformer blew up and caused quite a stir in the neighborhood - black smoke from the electrical fire coming out of a manhole... 
high frequency intermittent noise
@willemj Very good distinction.  I think the battery powered radio was a test to see if it was air born, which leads me to think it is not.  So then it is in the power.  I hope this is the case.  I have a Furman P-2400 IT on order, I'm going to gi... 
For tube sound, which is more important: preamp or power amp?
@willemj Good point, there are two prices a designer has to think about, the cost of manufacturing and the retail price of the product. 
For tube sound, which is more important: preamp or power amp?
@inna What drives a designer to design such products? For some, cost is no object in their designs, so it becomes a matter of performance at the cost of trade-offs. 
high frequency intermittent noise
As I was writing my last post I realized another important fact:The subway runs under my building.I just noticed the noise appearing when I listened for a train to go by.  There seems to be a correlation here, perhaps it's the subway system:  when...