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| Thread ID: 30865 | 2003-03-05 08:02:00 | Headset with long cable | somebody (208) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 125714 | 2003-03-05 08:02:00 | Previously, I've asked about how to use a headset w/mic through a PA system. I'm wondering now, is it possible for me to use 10m of extra cable without losing too much signal? My previous request was answered with info on using a 9v battery, 10uF capacitor, and a 2.2k resistor. It also stated that because of the output impendance, that they do not recommend using it over long cables. Does anybody with more knowledge on electronics (than me - unfortunately I don't know a great deal) know if using a 10m cable (with the "power supply" - battery, resistor, capacitor far away from the actual headset) would work?. Also, does anybody know if this method could power 4 headsets wired together, so 4 people on 4 headsets could talk at once? |
somebody (208) | ||
| 125715 | 2003-03-05 08:58:00 | > Previously, I've asked about how to use a headset > w/mic through a PA system. I'm wondering now, is it > possible for me to use 10m of extra cable without > losing too much signal? Its not the signal loss, 10m is not that long > My previous request was answered with info on using a > 9v battery, 10uF capacitor, and a 2.2k resistor. It > also stated that because of the output impendance, > that they do not recommend using it over long > cables. That likely because the cable is like a capacitor, and overly long cables will begin to act as a microphone (kick a cable and you will hear a "thud" in the PA system). An "electret" microphone insert is actually a capacitor, so the cable acts as a part of the microphone. > > Does anybody with more knowledge on electronics (than > me - unfortunately I don't know a great deal) know if > using a 10m cable (with the "power supply" - battery, > resistor, capacitor far away from the actual headset) > would work?. Also, does anybody know if this method > could power 4 headsets wired together, so 4 people on > 4 headsets could talk at once? You would totally upset the stability in my opinion, with impedances being all far too low. You would need a mixer and preferrably dynamic mics. You are trying to use the wrong equipment. Like washing your dishes in a clothes dryer. Look similar, act differently. |
godfather (25) | ||
| 125716 | 2003-03-06 02:43:00 | Ok. Thanks for your advice. I will investigate other options. | somebody (208) | ||
| 125717 | 2003-03-06 02:56:00 | Have a look at the Warehouse (toys) area. :D Or Dick Smith's for more expensive toys. There are some quite cheap UHF walkytalkies which might do what you want. Whatever that is. :D | Graham L (2) | ||
| 125718 | 2003-03-08 00:03:00 | I have investigated quite a lot of options including DSE's UHF RTs, Warehouse walkie talkies, or even hiring RTs as needed. However, I am pleased to announce that I have managed to get that system going using a PC Soundcard to power the mics/headphones and using my long homemade cables. I only tried this with one headphone, and two mics, but theoratically it will work with 4 sets of them (hopefully). |
somebody (208) | ||
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