[PLUG-TALK] Ubuntu desktop to stereo receiver

[Gregory Salter]

Get yourself a pair of choke ferrites and wrap the speaker cables a loop though each one. 

have to do this as a ham to block my own radio emissions. 


Gregory.




>________________________________
> From: John Jason Jordan <johnxj at comcast.net>
>To: PLUG-Talk <plug-talk at lists.pdxlinux.org> 
>Sent: Saturday, April 28, 2012 11:02 AM
>Subject: [PLUG-TALK] Ubuntu desktop to stereo receiver
> 
>I stream internet radio (and the occasional movie) to my home stereo
>receiver's auxiliary RCA inputs via a long cable running across the
>room. It connects to the audio out jack on my desktop computer,
>currently running Lucid, x86_64, although that may change in the near
>future. There is an adapter at the back of the computer that converts
>the 3.5 mm out to RCA, and then the cable across the room is a specially
>purchased shielded 20 foot RCA stereo cable. 
>
>I have been using this setup for some time, but it is problematic.
>First, the cables and/or sound chip on the motherboard pick up RF from
>the environment - two computers, laser printer, electric fan motors,
>possibly the refrigerator in the next room, and maybe even my brain.
>OK, probably not much RF output from my brain, or much of anything else
>either, but I definitely get a bit of 60 Hz hum, and when the
>screensaver comes on I hear soft rhythmic thumps. On top of that, the
>audio quality is not perfect, which I suspect is due to impedance
>mismatch between what the audio out on the computer delivers and what
>the auxiliary input on the stereo receiver is expecting. I don't know
>the impedance of either end, so that is a guess. The results are
>tolerable, but I know the stereo and speakers (ESS Amt10b) are capable
>of better sound.
>
>I am considering replacing the cable + adapter with a wireless
>transmitter/receiver setup, possibly this one:
>
>http://tinyurl.com/7rsft8k , or this one:  http://tinyurl.com/6n378ad
>
>As an alternative I am looking for a new receiver, one that has a
>built-in bluetooth receiver for audio input. I don't know if such
>exists, but it might be cool. The advantage of bluetooth, either built
>into the receiver or via one of the adapters in the above links, is
>that I can then stream from my phone if I want to. I currently stream
>internet radio stations via my phone to a pair of audiophile bluetooth
>headphones, and the sound is superb. I do this all the time - when
>outdoors hiking, or in the library at PSU, etc. However, the desktop
>computer does not have bluetooth, although I have a USB bluetooth
>dongle that I could plug in.
>
>Or maybe I need a different sound card in the computer, one that can
>transmit. Currently I'm using whatever ASUS put on the motherboard. But
>I don't know if such sound cards exist. 
>
>I'm fishing for ideas and suggestions. Any input is welcome. 
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