|   CD signal converter | lawmay
Nov 28, 2001 6:05 AM | | Hello,
I would like to connect a CD player, TV, and computer sound card to my stereo system. But I have an older stereo receiver (Luxor 3002) which has only 2 inputs: phono and tape (e.g. no CD or aux input). Does anyone make a converter which matches the impedence and signal strength of the CD, TV, and sound card outputs to the phono (or tape) input on my receiver? If not, are schematics available so that I can build such a converter myself? (Werent such converters in large demand when CD players were first introduced and most receivers lacked a CD input?) (To send a CD output into a phono input, which requires a weaker signal, wouldnt a simple resistor bridge suffice?)
I would greatly appreciate a reply ASAP.
Sincerely,
Lawrence Mayer <lawmay@ki.se>
Umeå, Sweden |
| It's simpler than you think. | Markw*
Nov 28, 2001 6:17 AM | | First off, the CD player, Television and the souund card all producte what is called a "line level" output. This can feed directly into the AUX input on your receiver.
You do NOT want to feed these into the phono input because it is too high a level and will overdrive your unit which will distort the sound tremendously.
Now, as to getting all three into that one input? All you need is a switch wit hmultiple inputs and one output. If you have Radio Shack there, theu have available (for US$15) a small switchbox which does exactly this. I've usesd this on some of my stuff for years and it works like a charm and doesn't hurt the sound at all.
If there is no Radio Shack local, you might try some local consumer electronics suppliers or even the internet. They ain't exactly high tech devices. |
| re: CD signal converter | AllanH
Nov 28, 2001 7:11 AM | | There's another reason why you can't use the phono input. Line level inputs are usually 'flat' in frequency response, but the phono input has a correction filter ( the RIAA curve ) which has a treble cut and bass boost to compensate for the inverse characteristic actually put on a vinyl record. Even if you attenuated the signals from your high-level sources down to the appropriate level ( I'd start off with about 50dB) it would sound awful because of this filter.
Markw's suggestions above are sensible.
Allan. |
| I don't HAVE an AUX input! | lawmay
Nov 30, 2001 6:50 AM | | Thanks for your reply. Unfortunately, my receiver doesn't HAVE an AUX input! (As I mentioned in my original posting, my receiver has only 2 inputs: PHONO and TAPE). I tried connecting my computer sound card's LINE OUT to my receiver's TAPE input, but that didn't work at all (all I got was soft, unstable whiperings of the music). So I drew the conclusion that a CD (or sound card) output has the wrong signal strength and/or impedence for the TAPE input.
Which brings me back to my original question. Does anyone make a converter to allow me to go into the TAPE (or PHONO) input of my receiver, or are schematics available so that I can build one myself? |
| I don't HAVE an AUX input! | Markw*
Nov 30, 2001 7:48 AM | | In virtually all reveivers I have run into in the past, a tape input will accept these line level signals, just as an AUX input will.
Likewise, virtually all receivers I have worked with have at least one high level (aux/cd/line) input available for just this purpose.
The fact that you cannot get any of these signals to work through your tape input causes me to question wether a) the receiver is working properly or b) if it is equipped to do what you are asking.
If the answer is "a" then perhaps you can get it fixed.
If it's "b", then this is a truly non standard unit and there's not much anyone can do without knowing the unit better.
In either case, it's probably more economical to be looking for a new receiver with an aux or cd input. It will be difficult to find one without one. Sorry. |
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