Personal computing discussed
Moderators: renee, mac_h8r1, Nemesis
keltor wrote:buy a 100 Quid LCD monitor and be happy
just brew it! wrote:Does the buzz change in volume and/or tone if you move the microphone cables around, or move the monitor relative to the PCs? If so, it isn't coming through the power cord, it is being induced by the magnetic field of the CRT deflection coils and/or radiated EMI from the flyback transformer.
The Egg wrote:Try looking for something called a "ground loop isolator". Most power conditioners for audio equipment would also take care of the issue, but I don't think you want to spend anywhere near that type of money, considering you're using a CRT.
just brew it! wrote:Does the buzz only occur when the mic is plugged in to the computer?
SecretSquirrel wrote:Are the mics condenser or dynamic?
Meadows wrote:SecretSquirrel wrote:Are the mics condenser or dynamic?
No idea. They were cheap.
SecretSquirrel wrote:If you don't have it set up already, configure the computer to blank the screen after a period of inactivity. This will leave the monitor power on but turn off the HV and beam sweep. If it goes away, you know the problem isn't a ground loop in and of itself.
Meadows wrote:SecretSquirrel wrote:If you don't have it set up already, configure the computer to blank the screen after a period of inactivity. This will leave the monitor power on but turn off the HV and beam sweep. If it goes away, you know the problem isn't a ground loop in and of itself.
I tried just that, the sound went much fainter but did not disappear completely and the tone did not change either. The sound only went away completely after I turned off the screen, even in that blank state. (Someone recommended checking the VGA cable but unplugging that hasn't changed a thing.) So what does this mean? Do I own a weapon of mass distraction?
SecretSquirrel wrote:Did you try the refresh rate change?
PenGun wrote:I just gave my mighty Sony 34" XS955 away. Still a very nice TV but my 30" 2560x1600 Korean monitor is so much nicer. I did not expect it to be so good.
Meadows wrote:PenGun wrote:I just gave my mighty Sony 34" XS955 away. Still a very nice TV but my 30" 2560x1600 Korean monitor is so much nicer. I did not expect it to be so good.
Nice troll, but if it can't do >120 Hz, it is inferior.
Meadows wrote:The Egg wrote:Try looking for something called a "ground loop isolator". Most power conditioners for audio equipment would also take care of the issue, but I don't think you want to spend anywhere near that type of money, considering you're using a CRT.
That doesn't sound like it would help, based on the responses from the other guys.
Also, I don't still use a CRT because I'm frugal or anything. At the time of purchase, this was the best screen with the highest desktop resolution supporting the highest refresh rates: 2048×1536 @ 80 Hz on the desktop and in most games (if my GPU can handle it), or straight 1280×960 @ 125 Hz for playing Quake Live at 125 fps (for example). It's probably still the best, considering the value I'm getting out of it. If I were to get an LCD, I would either suffer lower refresh rates or a lower resolution, and neither is acceptable.
So, not at this time.
Starfalcon wrote:My Sony CRT does 1920 x 1200 @ 85
The Egg wrote:It's possible that I've dealt with this issue before. The interference is being injected into the ground by the monitor, and then picked back up by other devices which are connected to the same ground. Considering you can find highly rated units for about $12, it's unquestionably the least expensive fix. If it doesn't work, you're only out 12 bucks at most.
Meadows wrote:I managed to disconnect the ground on the CRT using a wall socket converter and just for testing purposes I disconnected the ground on the PC itself too, and the issue never went away. Thus the only thing left is the microphone cable itself. The monitor's electromagnetic field is probably significant for some reason, so we'll look into shielding the microphone cable so it stops acting as a radio receiver.
The Egg wrote:Well.....definitely not the ground then. You might try a couple cheap ferrites for the mic cable as a last resort.