I use my headset with my K2, but would like to try it with another rig that supplies 10v. To get my other rig voltage down to the 3-4v region require about 12 meg ohms in series with the 10volts supplied.
An electret does not draw current in the classic sense. 5.6K seems to be a good value of resistor for almost anything from 5 to 8V but 12K might be safer for your 10-12V. The "big name" aviation headsets use 33 - 48K resistors for the typical 48V aircraft system. They tend to not work well with the 3-5V ham and computer supplies but if they are opened and the resistor removed (or replaced with a 2K2 depending on whether the equipment already contains a resistor), they work perfectly well at the lower voltage. I've always used a rule of thumb of 1K/V for electret mics. 73, ... Joe, W4TV On 3/14/2013 2:45 PM, Dr Ira J Saber wrote:
GA Everyone I hope this has not been answered before, but I could not find my answer in the archives, so here goes. Can anyone tell me how much bias the microphone is able to tolerate? Since the battery pack supplies 3v dc, I am sure that 4-5 volts probable won't hurt. But how about 10-12v DC? I use my headset with my K2, but would like to try it with another rig that supplies 10v. To get my other rig voltage down to the 3-4v region require about 12 meg ohms in series with the 10volts supplied. All of you guys and gals are a great source for info regardless of topic and I wish to thank all and any of you who choose to answer my "novice" question. I have learned something in my years on this earth, that if you don't ask you do not get any answers. Thanks again in advance. 73 Ira N2IS ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
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