. I was thinking of a transformer in the microphone case and the 9 foot cord which goes against my grain. I know we can make any of them work. When I hear AM radio guys talk about HighZ I think of a D-104 and it's ilk at about 5 megohms, this is high Z! When I hear 30K ohms I am thinking of a Hi-Z SSB like Kenwood TS520s,Drakes and Collins. That is what they call high Z. Most broadcast mics, I think are about 50 ohms ( dynamic types). I notice that a Shure 515SB is rated at 150 ohms, actual is 170 ohms and is for use on 19 to 300 ohm inputs..I too like the mixer plan.. 73.. Mike ----- Original Message ----- From: "John E. Coleman (ARS WA5BXO)" <[EMAIL PROTECTED]> To: "'Mike Dorworth, K4XM'" <[EMAIL PROTECTED]>; "'Discussion of AM Radio in the Amateur Service'" <amradio@mailman.qth.net> Sent: Thursday, August 31, 2006 5:40 PM Subject: RE: [AMRadio] Microphone assistance
> You are correct Mike, > One way to help with the cable capacitance trouble, if a XFMR is to > be used to step up the voltage, is to put the XRMR close the input circuit > or preferably in the speech amp chassis and incorporate a 3 pin XLR > connector. Run balanced low Z from the microphone to the XLR input and > using the shield of the cable for just a shield and not common the audio of > the microphone. The mixer is a good plan if available and may have other > uses. ______________________________________________________________ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
