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#1
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2 inputs to headphones?
I use a motorcycle and would like to be able to listen to two audio sources
at once through headphones. The main source would be a standard 'Walkman' type, the second source is a Dell Axim PDA running a navigation / speed camera warning system. The cabling up doesn't seem a problem and I do not feel that either or even both inputs would be excessive for the earphones. My concern is that the walkman would feed it's output to the Axim and vice versa. Will this cause any problems? is anyone aware of anything I can use to prevent the backwards feeding? Any help appreciated. RJO |
#2
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2 inputs to headphones?
An easier solution, and much safer too, especially
for other road users, is if you get your testosterone under control and obeyed the laws of the road, then you'd have no need to worry about speed camera'a etc. |
#3
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2 inputs to headphones?
"R.J.O." wrote: I use a motorcycle and would like to be able to listen to two audio sources at once through headphones. The main source would be a standard 'Walkman' type, the second source is a Dell Axim PDA running a navigation / speed camera warning system. The cabling up doesn't seem a problem and I do not feel that either or even both inputs would be excessive for the earphones. My concern is that the walkman would feed it's output to the Axim and vice versa. Will this cause any problems? is anyone aware of anything I can use to prevent the backwards feeding? Any help appreciated. RJO Go to your local motorcycle shop. Such systems are out there, and are not cheap. Friend of mine has one that allows him to talk on three different radios, and listen to the computer, CD player/radio, etc. --Dale |
#4
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2 inputs to headphones?
In , on 09/23/03
at 07:39 PM, "R.J.O." said: I use a motorcycle and would like to be able to listen to two audio sources at once through headphones. The main source would be a standard 'Walkman' type, the second source is a Dell Axim PDA running a navigation / speed camera warning system. The cabling up doesn't seem a problem and I do not feel that either or even both inputs would be excessive for the earphones. My concern is that the walkman would feed it's output to the Axim and vice versa. Will this cause any problems? is anyone aware of anything I can use to prevent the backwards feeding? More than likely, just wiring the two units in parallel will work just fine -- it depends on each units design -- some designs won't like that. A safer way of doing the job is to insert a 150 Ohm resistor in series with each headphone jack before you join the outputs. The down side of this approach will be a decrease in volume. If you have volume to spare, this will not be a problem. A more robust solution would be to employ a mixer/amplifier that will combine both units and amplify them a bit. This is quite a bit more expensive, but it will allow you some extra headroom over the road noise. (Possibly causing an earlier demise of your hearing.) ----------------------------------------------------------- SPAM: wordgame:123(abc):14 9 20 5 2 9 18 4 at 22 15 9 3 5 14 5 20 dot 3 15 13 (Barry Mann) [sorry about the puzzle, SPAMers are ruining my mailbox] ----------------------------------------------------------- |
#5
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2 inputs to headphones?
"Barry Mann" wrote in message om... In , on 09/23/03 at 07:39 PM, "R.J.O." said: I use a motorcycle and would like to be able to listen to two audio sources at once through headphones. The main source would be a standard 'Walkman' type, the second source is a Dell Axim PDA running a navigation / speed camera warning system. I used a 6-channel mixer back in the '80s. Of course I had a police scanner along with my TV and VCR...I had it rigged to squelch the tunes when something came on certain channels. Ended up having to get a bigger battery for the bike. Had an awesome time working on that system. -chirs |
#6
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2 inputs to headphones?
I use a motorcycle and would like to be able to listen to two audio sources at once through headphones. The main source would be a standard 'Walkman' type, the second source is a Dell Axim PDA running a navigation / speed camera warning system. The cabling up doesn't seem a problem and I do not feel that either or even both inputs would be excessive for the earphones. My concern is that the walkman would feed it's output to the Axim and vice versa. Will this cause any problems? is anyone aware of anything I can use to prevent the backwards feeding? Any help appreciated. RJO Shopuld be able to do this with a couple of small transformers in a combining network. Richard H. Kuschel "I canna change the law of physics."-----Scotty |
#7
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2 inputs to headphones?
"R.J.O." wrote
I use a motorcycle and would like to be able to listen to two audio sources at once through headphones. The main source would be a standard 'Walkman' type, the second source is a Dell Axim PDA running a navigation / speed camera warning system. The cabling up doesn't seem a problem and I do not feel that either or even both inputs would be excessive for the earphones. My concern is that the walkman would feed it's output to the Axim and vice versa. Will this cause any problems? is anyone aware of anything I can use to prevent the backwards feeding? You could feed the (left, or right, or sum l+r for mono) walkman into the left ear and the (left, or right, or sum l+r for mono) PDA into the right ear. You'd lose stereo audio, but it may easier to understand the navigation instructions if they come in a different ear from the music. AIUI this split feed is used in aircraft for separating crew and radio comms. This would mean the two equipments grounds would be common but not the signal wires. Owain |
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